Refactor signature handling with SignatureCaptureDto

Introduced a new `SignatureCaptureDto` model to encapsulate
signature-related data and metadata, replacing the previous
`SignatureCapture` type in `EnvelopeViewer.razor`.

- Added `SignatureCaptureDto` in `SignatureCaptureDto.cs` with
  properties for signature image, signer name, position, and place.
- Updated `_capturedSignature` to use `SignatureCaptureDto` for
  consistency and maintainability.
- Refactored signature capture logic to initialize
  `SignatureCaptureDto` using object initializer syntax.
- Improved code clarity with detailed XML documentation for
  `SignatureCaptureDto`.

These changes enhance maintainability, readability, and ensure
a centralized model for signature-related data.

COPILOT_CONTEXT_EN.md

@@ -0,0 +1,946 @@
+# EnvelopeGenerator — Copilot Context Notes (English)
+
+## Purpose
+A digital document signing system. Senders upload PDFs and place signature annotation fields via PSPDFKit (EnvelopeGenerator.Web). Receivers open the document in a Blazor WASM viewer, confirm each signature field via a checkbox overlay, draw/type/upload their signature, and export the stamped PDF.
+
+---
+
+## Solution Structure
+
+| Project | Target | Description |
+|---|---|---|
+| `EnvelopeGenerator.API` | net8.0 | ASP.NET Core Web API. Receiver auth (cookie), annotation reading, PDF serving. |
+| `EnvelopeGenerator.ReceiverUI` | net8.0 WASM | Blazor WebAssembly. Receiver UI. YARP proxies API calls. |
+| `EnvelopeGenerator.Web` | net7/8/9 | Razor Pages. Sender UI + PSPDFKit annotation placement. |
+| `EnvelopeGenerator.Application` | multi | MediatR CQRS handlers. |
+| `EnvelopeGenerator.Domain` | multi | Domain models, constants, interfaces. |
+| `EnvelopeGenerator.Infrastructure` | multi | EF Core repos, DB context. |
+| `EnvelopeGenerator.PdfEditor` | multi | iText7 utilities. NOT used in ReceiverUI flow. |
+| `EnvelopeGenerator.DependencyInjection` | multi | DI registration helpers. |
+| VB.NET projects (Service/Form/BBTests) | net462 | Legacy. Do NOT touch. |
+
+---
+
+## Key Files
+
+| File | Purpose |
+|---|---|
+| `ReceiverUI/Pages/EnvelopeViewer.razor` | **NEW** PDF.js-based viewer (`/envelope/{key}`). Replaces ReportViewer.razor. Simple read-only PDF viewing with zoom/navigation. |
+| `ReceiverUI/Pages/ReportViewer.razor` | **LEGACY** DevExpress-based signing page (`/receiver/{key}`). Still used for signature workflow. Will be deprecated. |
+| `ReceiverUI/wwwroot/js/pdf-viewer.js` | **NEW** PDF.js wrapper: rendering, zoom, pagination, mouse wheel control. |
+| `ReceiverUI/wwwroot/js/receiver-signature.js` | JS: checkbox overlay, signature pad (draw/type/image). |
+| `ReceiverUI/wwwroot/css/envelope-viewer.css` | **NEW** Styles for EnvelopeViewer.razor (external CSS, not inline). |
+| `ReceiverUI/wwwroot/fake-data/annotations.json` | Dev-mode fake annotations (YARP proxy target). |
+| `ReceiverUI/Models/AnnotationDto.cs` | Annotation position model. All properties non-nullable. |
+| `ReceiverUI/Services/AnnotationService.cs` | Fetches `List<AnnotationDto>` from API or fake-data. |
+| `ReceiverUI/Services/DocumentService.cs` | Fetches PDF bytes from API. |
+| `ReceiverUI/Services/AuthService.cs` | Manages receiver session cookie. |
+| `API/Controllers/AnnotationController.cs` | GET `api/Annotation/{key}` ? annotation list. |
+| `API/Controllers/DocumentController.cs` | GET `api/Document/{key}` ? PDF bytes. |
+
+---
+
+## SignatureDto / AnnotationDto — Coordinate System
+
+**Database Storage Format:** INCHES (GdPicture14 native unit)  
+**Origin:** Top-left corner of page  
+**Axes:** X increases rightward, Y increases downward
+
+### Source Evidence (VB.NET Legacy Code)
+
+```vb
+' From: EnvelopeGenerator.Form/frmFieldEditor.vb
+' GdPicture14.Annotations.AnnotationStickyNote
+
+'Breite und Höhe in Inches (4,5*5cm)
+Private Const SIGNATURE_WIDTH As Single = 1.77   ' 1.77 inches = 4.5cm
+Private Const SIGNATURE_HEIGHT As Single = 1.96  ' 1.96 inches = 5cm
+
+Sub LoadAnnotation(pElement As Signature, ...)
+    oAnnotation.Left = CSng(pElement.X)      ' Direct assignment ? INCHES
+    oAnnotation.Top = CSng(pElement.Y)
+    oAnnotation.Width = CSng(pElement.Width)
+    oAnnotation.Height = CSng(pElement.Height)
+End Sub
+```
+
+### Conversion Formulas
+
+```
+Inches ? DevExpress (DX):  x_DX = x_inches * 100.0
+                          y_DX = y_inches * 100.0
+
+Inches ? PDF Points:       x_pt = x_inches * 72.0
+                          y_pt = x_inches * 72.0
+
+Inches ? PDF.js Canvas:    normalize to [0,1], then scale to pixels
+                          x_norm = x_inches / pageWidth_inches
+                          y_norm = y_inches / pageHeight_inches
+                          x_px = x_norm * canvasWidth * scale * dpr
+                          y_px = y_norm * canvasHeight * scale * dpr
+```
+
+### Unit Comparison Table
+
+| System | Unit | Origin | Conversion from INCHES |
+|--------|------|--------|------------------------|
+| **GdPicture14** (Source) | **Inches** | Top-left | Database format (no conversion) |
+| DevExpress (LEGACY) | 1/100 inch (DX) | Top-left | `x_DX = x_inches * 100` |
+| PDF.js (NEW) | Pixels | Top-left | `normalize ? scale` |
+| PDF Points (iText7) | Points (1/72") | **Bottom-left** | `x_pt = x_inches * 72` + Y-flip |
+| PSPDFKit (Web) | Points (1/72") | Top-left | `x_pt = x_inches * 72` |
+
+**A4 Page Dimensions:**
+- Width: 8.27 inches = 595 points = 827 DX units
+- Height: 11.69 inches = 842 points = 1169 DX units
+
+---
+
+## EnvelopeViewer (NEW) — PDF.js Read-Only Viewer
+
+**Route:** `/envelope/{EnvelopeKey}`  
+**Purpose:** Modern, high-performance PDF viewing without signing functionality.  
+**Technology:** PDF.js 3.11.174 + custom JavaScript + configurable quality settings
+
+### Architecture
+
+**Blazor Component (`EnvelopeViewer.razor`):**
+- Fetches PDF via `DocumentService.GetDocumentAsync(EnvelopeKey)`
+- Converts to base64 data URL: `data:application/pdf;base64,{base64}`
+- Initializes PDF.js viewer via JSInterop with `DotNetObjectReference` for callbacks
+- Quality settings loaded from `appsettings.json` via `IOptions<PdfViewerOptions>`
+- Thumbnail sidebar with resizable splitter (150px-400px, localStorage persistence)
+- CSS externalized to `envelope-viewer.css`
+
+**JavaScript (`pdf-viewer.js`):**
+```javascript
+window.pdfViewer = {
+    qualityOptions,              // Configurable from appsettings.json
+    setQualityOptions(options),  // Dynamic quality update
+    initialize(canvasId, pdfDataUrl, dotNetRef),
+    renderPage(num),
+    renderThumbnail(pageNum, canvasId),
+    attachWheelEvent(),          // Ctrl+Wheel zoom (configurable step)
+    zoomIn(), zoomOut(),         // Configurable step percentage
+    dispose()
+}
+```
+
+**Options (`PdfViewerOptions.cs`):**
+```csharp
+public class PdfViewerOptions {
+    public double ThumbnailBaseScale { get; set; } = 0.75;      // 0.2-1.5
+    public bool ThumbnailEnableHiDPI { get; set; } = true;
+    public double ThumbnailMaxDPR { get; set; } = 2.0;          // 1.0-3.0
+    public bool MainCanvasEnableHiDPI { get; set; } = true;
+    public double MainCanvasMaxDPR { get; set; } = 2.0;
+    public bool EnableSmoothZoom { get; set; } = true;
+    public int ZoomTransitionDuration { get; set; } = 150;      // ms
+    public double RenderingOpacity { get; set; } = 0.85;        // 0.0-1.0
+    public int ThumbnailRenderDelay { get; set; } = 50;         // ms
+    public int ZoomStepPercentage { get; set; } = 5;            // 1-50%
+}
+```
+
+### Configuration (appsettings.json)
+
+**Location:** `EnvelopeGenerator.ReceiverUI/wwwroot/appsettings.json`
+
+```json
+{
+  "PdfViewer": {
+    "ThumbnailBaseScale": 0.75,
+    "ThumbnailEnableHiDPI": true,
+    "ThumbnailMaxDPR": 2.0,
+    "MainCanvasEnableHiDPI": true,
+    "MainCanvasMaxDPR": 2.0,
+    "EnableSmoothZoom": true,
+    "ZoomTransitionDuration": 150,
+    "RenderingOpacity": 0.85,
+    "ThumbnailRenderDelay": 50,
+    "ZoomStepPercentage": 5
+  }
+}
+```
+
+**Usage:** Edit file ? F5 (browser refresh) ? new settings applied
+
+**Presets:**
+- **High Quality**: `ThumbnailBaseScale: 1.0, MaxDPR: 3.0` (powerful devices)
+- **Balanced**: Default values (recommended)
+- **Performance**: `ThumbnailBaseScale: 0.5, EnableHiDPI: false` (mobile/low-end)
+
+---
+
+### Features
+
+1. **HiDPI/Retina Support** ? 4x quality on Retina displays
+2. **Configurable Quality** ? All parameters in appsettings.json
+3. **Unlimited Zoom** ? 50%-300%, configurable step (default 5%)
+4. **Global Ctrl+Wheel Zoom** ? Works anywhere on page
+5. **Thumbnail Sidebar** ? Resizable (150-400px), high-quality rendering
+6. **Smooth Transitions** ? Configurable fade effect
+7. **Responsive Design** ? Desktop/mobile adaptive layout
+
+---
+
+### Features
+
+1. **Unlimited Zoom:**
+   - Canvas size not restricted by `max-width`
+   - Frame stays fixed, scroll bars appear automatically
+   - `text-align: center` for small sizes, full scroll for zoomed views
+
+2. **Global Mouse Wheel Zoom:**
+   - Event listener on `document.body` (works anywhere on page)
+   - `Ctrl + Mouse Wheel` triggers `zoomIn()`/`zoomOut()`
+   - Calls `dotNetReference.invokeMethodAsync('OnZoomChanged', scale)` to update Blazor UI
+   - `{ passive: false }` to enable `preventDefault()`
+
+3. **Render Task Cancellation:**
+   - Stores `currentRenderTask` to cancel previous render if new one starts
+   - Catches `RenderingCancelledException` to avoid console errors
+   - Queue system (`pageNumPending`) for rapid page changes
+
+4. **Thumbnail Sidebar:**
+   - Left panel with page previews (sequential rendering, 50ms delay)
+   - Click to navigate to specific page
+   - Active page highlighted with gradient border
+   - No header/title (maximizes thumbnail space)
+   - Toggle button in toolbar to show/hide
+
+5. **Resizable Splitter:**
+   - 4px draggable divider between thumbnails and canvas
+   - Min width: 150px, Max width: 400px
+   - Visual feedback: gradient on hover/active
+   - User preference saved to localStorage (`envelopeViewer_thumbnailWidth`)
+   - Global mouse events (works anywhere during drag)
+   - `col-resize` cursor (?) for intuitive UX
+
+6. **Flex Layout:**
+   - Thumbnails and canvas in same container (`.pdf-frame`)
+   - `display: flex, flex-direction: row, align-items: stretch`
+   - Perfect vertical alignment (same top/bottom position)
+   - Responsive: column layout on mobile (<768px)
+
+7. **Responsive Design:**
+   - Desktop: 90% width, 1200px max
+   - Mobile: 95% width, adjusted heights, thumbnails collapse to top
+   - Adaptive padding and font sizes
+
+### Initialization Flow
+
+```csharp
+OnInitializedAsync():
+  1. Fetch PDF bytes from DocumentService
+  2. Convert to base64 data URL
+  3. Set _isLoading = false
+
+OnAfterRenderAsync(firstRender):
+  1. Load saved thumbnail width from localStorage
+  2. Create DotNetObjectReference
+  3. Send PdfViewerOptions to JavaScript
+  4. Initialize PDF.js viewer
+  5. Attach splitter resize listeners
+  6. Render thumbnails sequentially (configurable delay)
+```
+
+**User Interactions:**
+- Zoom: Buttons/Ctrl+Wheel/Slider ? configurable step percentage
+- Pages: Buttons/Input/Thumbnails ? navigate
+- Sidebar: Toggle button ? show/hide thumbnails
+- Splitter: Drag ? resize sidebar (150-400px)
+
+**Cleanup:**
+```csharp
+DisposeAsync():
+  - Dispose PDF.js viewer
+  - Detach event listeners
+  - Dispose DotNetObjectReference
+```
+
+---
+
+### Key Differences from ReportViewer
+
+| Feature | EnvelopeViewer (NEW) | ReportViewer (LEGACY) |
+|---------|----------------------|------------------------|
+| Technology | PDF.js + Canvas | DevExpress XtraReports |
+| Route | `/envelope/{key}` | `/receiver/{key}` |
+| Purpose | Read-only viewing | Signature workflow |
+| Dependencies | PDF.js CDN | DevExpress NuGet packages |
+| Zoom | Unlimited, smooth | Report viewer default |
+| Mouse Wheel | Custom Ctrl+Wheel | Browser default |
+| File Size | Minimal (JS + CSS) | Heavy (DX libs) |
+| Maintenance | Simple, standard web | Complex, vendor-specific |
+
+---
+
+## ReceiverUI Signing Flow (ReportViewer.razor — LEGACY)
+
+### On Load (`OnInitializedAsync`)
+1. `AuthService.CheckEnvelopeAccessAsync` ? redirect to login if unauthorized
+2. `AnnotationService.GetAnnotationsAsync` ? fills `_annotations`
+3. `DocumentService.GetDocumentAsync` ? fills `_basePdfBytes` (real mode)
+4. `BuildFreshBaseReport()` ? `XtraReport` for `DxReportViewer`
+
+### Signature Popup
+- Tabs: Draw / Text / Image
+- Fields: full name (required), position (optional), place (required)
+- Saved to `_capturedSignature` record
+- If annotations exist ? popup closes ? JS checkbox overlays installed
+
+### JS Checkbox Overlay (`receiver-signature.js`)
+- `receiverSignature.installAnnotationCheckboxes(annotations, checkedIds, dotNetRef)`
+- One `.annot-sig-cb-wrapper` div per annotation, absolutely positioned over viewer scroll container
+- Position: `left = pageRect.left + ann.x * scaleX`, `top = pageRect.top + ann.y * scaleY`
+  - `scaleX = pagePixelWidth / 827`, `scaleY = pagePixelHeight / 1169`
+- Click ? `dotNetRef.invokeMethodAsync('OnAnnotationToggled', id, checked)`
+
+### Apply Signatures ("Unterschriften anwenden" — `SubmitSignaturesAsync`)
+
+**Real PDF mode (`_basePdfBytes` is set):**
+- Calls `StampSignaturesOnPdf` using **iText7** directly on PDF bytes
+- Coordinate conversion: `xPt = ann.X * (72/100)`, `yPt = pageHeight - ann.Y * (72/100) - sigHeight` (Y flip: DX top-down ? PDF bottom-up)
+- Returns stamped bytes ? loaded into new `XtraReport` with `XRPdfContent`
+- Viewer refreshed with `ViewerKey++`
+
+**Dev/fake mode (`_basePdfBytes` is null):**
+- Falls back to `AddSignatureAtAnnotation` (XtraReports DetailBand + BeforePrint counter)
+- This is intentionally left as a dev fallback only
+
+### Export
+- `reportViewer.ExportToAsync(ExportFormat.Pdf)`
+
+---
+
+## StampSignaturesOnPdf — iText7 Implementation
+
+```csharp
+// Located in ReportViewer.razor @code section
+// Called by SubmitSignaturesAsync when _basePdfBytes is available
+
+static byte[] StampSignaturesOnPdf(
+    byte[] sourcePdfBytes, byte[] signatureImageBytes,
+    string signerFullName, string signerPosition, string signaturePlace,
+    IReadOnlyList<AnnotationDto> annotations)
+{
+    // Opens PDF with PdfReader/PdfWriter
+    // For each annotation:
+    //   pageNum = ann.Page (clamped to totalPages)
+    //   xPt = ann.X * (72f/100f)
+    //   imgBottomY = pageHeight - ann.Y * (72f/100f) - sigHeightPt  ? Y-axis flip
+    //   PdfCanvas.AddImageFittedIntoRectangle(imageData, rect, false)
+    //   Separator line at bottom of image
+    //   Canvas text block below separator (font: Helvetica 7pt, color: RGB(73,80,87))
+    // Returns stamped byte[]
+}
+```
+
+---
+
+## BuildFreshBaseReport()
+
+```csharp
+// Real PDF mode:
+var report = new XtraReport();
+var detail = new DetailBand();
+report.Bands.Add(detail);
+detail.Controls.Add(new XRPdfContent { Source = _basePdfBytes, GenerateOwnPages = true });
+return report;
+
+// Dev/fake mode: returns pre-built report from ReportStorage
+```
+
+---
+
+## NuGet Packages in ReceiverUI
+
+| Package | Version | Purpose |
+|---|---|---|
+| `DevExpress.Blazor.Reporting.Viewer` | 25.2.3 | DxReportViewer (LEGACY, used in ReportViewer.razor) |
+| `DevExpress.Blazor.PdfViewer` | 25.2.3 | PDF viewer (not used in EnvelopeViewer) |
+| `DevExpress.Drawing.Skia` | 25.2.3 | Drawing backend |
+| `itext` | 8.0.5 | PDF stamping (iText7) |
+| `SkiaSharp.*` | 3.119.1 | WASM native rendering |
+
+**External CDN (EnvelopeViewer):**
+- PDF.js 3.11.174 (via `https://cdnjs.cloudflare.com/ajax/libs/pdf.js/3.11.174/pdf.min.js`)
+- PDF.js Worker (`pdf.worker.min.js`)
+
+---
+
+## Mistakes History — Do NOT Repeat
+
+| Mistake | Why Wrong | Session |
+|---|---|---|
+| `BottomMarginBand` for per-page signatures | Repeats on every page; Y offset wrong | 4 |
+| `imageY = (page-1) * 1169 + ann.Y` | Inflates DetailBand; 35 pages ? 140 pages | 8 |
+| `e.Graph?.PrintingSystem` in BeforePrint | `Graph` not on `CancelEventArgs` | 5 |
+| `ctrl.Report?.PrintingSystem` | `PrintingSystem` not on `XtraReportBase` in WASM | — |
+| Adding stamp endpoint to `DocumentController` | Not needed; stamping is done client-side in ReceiverUI | — |
+| iText7 via API (server-side) | Unnecessary; iText7 runs fine in WASM directly | 10 |
+| **PDF.js: Hardcoded quality values** | **Use appsettings.json for configurability** | **11** |
+| **PDF.js: Hardcoded zoom step (1%)** | **Too granular; use configurable percentage** | **11** |
+| **Toolbar: Complex left/center/right layout** | **User wants simple horizontal layout; failed multiple times to implement** | **11** |
+| **Zoom label: Badge style (gradient/border/padding)** | **Over-designed; user prefers simple text label** | **11** |
+| **Attempting to "improve" simple designs** | **User requests simplicity; AI keeps over-engineering** | **11** |
+| **Ignoring explicit "revert" instructions** | **User said revert toolbar, AI tried to fix CSS instead of reverting HTML structure** | **11** |
+
+---
+
+## DevExpress Article (2023-08-28) — Why It Does NOT Apply
+
+The article describes **X.509 cryptographic digital signatures** via `PdfDocumentSigner` + `Pkcs7Signer`.  
+Our use case is **visual/image stamping** at specific page coordinates — different problem, different API.  
+`XRPdfSignature` in the article requires pre-placed fields in the report designer, not runtime coordinates.
+
+---
+
+## Layout Architecture (EnvelopeViewer)
+
+### HTML Structure
+```html
+<div class="pdf-viewer-container">
+  <div class="pdf-toolbar">
+    <!-- Zoom, page navigation, thumbnail toggle -->
+  </div>
+  
+  <div class="pdf-frame">
+    @if (_showThumbnails) {
+      <div class="pdf-thumbnails" style="width: @(_thumbnailWidth)px">
+        <!-- Page previews -->
+      </div>
+      <div class="pdf-splitter" @onmousedown="OnSplitterMouseDown">
+        <!-- Resizable divider -->
+      </div>
+    }
+    <div class="pdf-canvas-wrapper">
+      <canvas id="pdf-canvas" class="pdf-canvas"></canvas>
+    </div>
+  </div>
+</div>
+```
+
+### CSS Flexbox Layout
+```css
+.pdf-frame {
+  display: flex;
+  flex-direction: row;        /* Side-by-side */
+  align-items: stretch;       /* Same height */
+  overflow: hidden;
+}
+
+.pdf-thumbnails {
+  flex-shrink: 0;             /* Fixed width */
+  width: 260px;               /* Dynamic via inline style */
+  border-right: none;         /* Seamless join with splitter */
+}
+
+.pdf-splitter {
+  width: 4px;
+  cursor: col-resize;
+  flex-shrink: 0;
+}
+
+.pdf-canvas-wrapper {
+  flex: 1;                    /* Fill remaining space */
+  overflow: auto;             /* Scrollable for zoom */
+  padding: 2rem;
+  text-align: center;
+}
+```
+
+### Resizable Splitter Workflow
+```
+1. User hovers splitter ? cursor: col-resize (?)
+2. Mouse down ? OnSplitterMouseDown(e)
+   - _isResizing = true
+   - Store start position (clientX) and width
+   - Add 'resizing' class to body (prevent text selection)
+   - Call pdfViewer.startResize()
+
+3. Mouse move (global) ? OnSplitterMouseMove(clientX)
+   - Calculate delta = clientX - startX
+   - newWidth = startWidth + delta
+   - Clamp to 150-400px range
+   - Update _thumbnailWidth
+   - StateHasChanged() for reactive UI
+
+4. Mouse up (global) ? OnSplitterMouseUp()
+   - _isResizing = false
+   - Remove 'resizing' class
+   - Save to localStorage("envelopeViewer_thumbnailWidth")
+```
+
+### Responsive Behavior
+- **Desktop (>768px)**: Flex row, side-by-side
+- **Mobile (?768px)**: Flex column, thumbnails on top
+- **Thumbnail toggle**: Controlled by `@if (_showThumbnails)` in Razor markup
+
+---
+
+## Signature Buttons in EnvelopeViewer — Interactive Overlay System
+
+**Purpose:** Render clickable "Unterschreiben" (Sign) buttons on PDF canvas at signature field positions fetched from database.
+
+### Architecture
+
+**Blazor Component (`EnvelopeViewer.razor`):**
+```csharp
+IReadOnlyList<SignatureDto> _signatures = [];
+
+protected override async Task OnInitializedAsync() {
+    var signatures = await SignatureService.GetAsync(EnvelopeKey);
+    _signatures = signatures.Convert(UnitOfLength.Point);  // INCHES ? POINTS
+}
+
+async Task RenderSignatureButtonsAsync() {
+    await JSRuntime.InvokeVoidAsync("pdfViewer.renderSignatureButtons", 
+        _signatures, _currentPage, _dotNetRef);
+}
+
+[JSInvokable]
+public void OnSignatureButtonClick(int signatureId) {
+    Console.WriteLine($"Signature #{signatureId} signed");
+}
+```
+
+**JavaScript (`pdf-viewer.js`):**
+```javascript
+renderSignatureButtons(signatures, currentPageNum, dotNetRef) {
+    this.clearSignatureButtons();  // Remove old buttons
+    
+    const pageSignatures = signatures.filter(sig => sig.page === currentPageNum);
+    const signatureLayer = document.getElementById('pdf-signature-layer');
+    
+    pageSignatures.forEach(sig => {
+        // Convert POINTS to display pixels
+        const xPx = sig.x * this.scale;  // sig.x already in PDF POINTS
+        const yPx = sig.y * this.scale;
+        
+        const button = document.createElement('button');
+        button.className = 'signature-button';
+        button.style.left = `${xPx}px`;
+        button.style.top = `${yPx}px`;
+        button.style.width = '150px';
+        button.style.height = '60px';
+        
+        // German text + pen icon
+        button.innerHTML = `
+            <div>Unterschreiben</div>
+            <svg>...</svg>
+        `;
+        
+        button.addEventListener('click', () => {
+            this.dotNetReference.invokeMethodAsync('OnSignatureButtonClick', sig.id);
+        });
+        
+        signatureLayer.appendChild(button);
+        this.signatureButtons.push(button);
+    });
+}
+
+clearSignatureButtons() {
+    this.signatureButtons.forEach(btn => btn.parentNode?.removeChild(btn));
+    this.signatureButtons = [];
+}
+```
+
+**HTML Structure:**
+```html
+<div class="pdf-page-container">
+    <canvas id="pdf-canvas"></canvas>
+    <div id="pdf-text-layer"></div>
+    <div id="pdf-signature-layer"></div>  <!-- NEW -->
+</div>
+```
+
+**CSS (`envelope-viewer.css`):**
+```css
+.pdf-signature-layer {
+    position: absolute;
+    left: 0; top: 0; right: 0; bottom: 0;
+    overflow: visible;
+    pointer-events: none;  /* Pass clicks through to canvas */
+    z-index: 20;
+}
+
+.signature-button {
+    pointer-events: auto;  /* Re-enable for buttons */
+    position: absolute;
+    width: 150px; height: 60px;
+    background: linear-gradient(135deg, #4F46E5 0%, #4338CA 100%);
+    color: white;
+    border: none;
+    border-radius: 8px;
+    cursor: pointer;
+    /* Hover: scale(1.05), shadow, darker gradient */
+}
+```
+
+### Rendering Triggers
+
+1. **Initial Load:** After PDF renders (`OnAfterRenderAsync`)
+2. **Page Change:** `NextPage()`, `PreviousPage()`, `GoToPageFromThumbnail()`
+3. **Zoom Change:** `OnZoomChanged()` (re-calculates pixel positions)
+
+### Coordinate Conversion Flow
+
+```
+Database (INCHES)
+  ? SignatureService.GetAsync()
+SignatureDto.X/Y (INCHES)
+  ? .Convert(UnitOfLength.Point)
+SignatureDto.X/Y (PDF POINTS, × 72)
+  ? JavaScript
+Display Pixels (× this.scale)
+  ? CSS
+button.style.left/top
+```
+
+**Example Calculation:**
+- Database: `X = 1.5 inches, Y = 2.0 inches`
+- After conversion: `X = 108 points, Y = 144 points` (× 72)
+- At scale 1.5: `X = 162px, Y = 216px`
+- Button positioned at `left: 162px, top: 216px`
+
+### Button Design
+
+**Visual Spec:**
+- **Size:** 150px × 60px
+- **Background:** Purple gradient `#4F46E5` ? `#4338CA` (hover: darker)
+- **Text:** "Unterschreiben" (18px, bold, white)
+- **Icon:** Pen SVG (24px white)
+- **Effects:**
+  - Hover: `scale(1.05)` + shadow `0 4px 12px rgba(79, 70, 229, 0.4)`
+  - Active: `scale(0.98)`
+  - Focus: `2px solid #7e22ce` outline
+
+**Accessibility:**
+- `tabindex="0"` for keyboard navigation
+- Focus outline for keyboard users
+- Click handler with semantic button element
+
+---
+
+## Signature Workflow in EnvelopeViewer — NEW Implementation (Session 13-14)
+
+**IMPORTANT: iText7 NOT USED in EnvelopeViewer**
+- **Reason:** GPL license incompatibility (requires source code sharing)
+- **Alternative:** Client-side signature overlay system (HTML + Canvas API)
+- **Export:** Signatures are visual overlays only, NOT stamped on PDF bytes
+- **Future:** Consider PSPDFKit or commercial PDF library for actual PDF stamping
+
+### Signature Data Structure
+
+**Captured Signature (`SignatureCaptureDto`):**
+```csharp
+// Model: EnvelopeGenerator.ReceiverUI/Models/SignatureCaptureDto.cs
+public sealed record SignatureCaptureDto
+{
+    public required string DataUrl { get; init; }      // base64 PNG: "data:image/png;base64,iVBORw0KG..."
+    public required string FullName { get; init; }     // Required: "Max Mustermann"
+    public string Position { get; init; } = string.Empty;  // Optional: "Geschäftsführer"
+    public required string Place { get; init; }        // Required: "Berlin"
+}
+
+// Usage in components:
+SignatureCaptureDto? _capturedSignature;
+
+// Initialization with object initializer (required properties):
+_capturedSignature = new SignatureCaptureDto
+{
+    DataUrl = signatureDataUrl,
+    FullName = _signerFullName.Trim(),
+    Position = _signerPosition.Trim(),
+    Place = _signaturePlace.Trim()
+};
+```
+
+**Applied Signature (HTML Overlay):**
+```html
+<div class="applied-signature" data-signature-id="42" style="left: 162px; top: 216px;">
+    <img src="data:image/png;base64,..." />  <!-- Signature image (max 70px height) -->
+    <div style="border-top: 1px solid #495057;"></div>  <!-- Separator line -->
+    <div style="font-size: 9px; color: #495057;">
+        <strong>Max Mustermann</strong>     <!-- Name (bold, #212529) -->
+        <br>Geschäftsführer                <!-- Position (optional) -->
+        <br>Berlin, 26.01.2025              <!-- Place, Date (dd.MM.yyyy) -->
+    </div>
+</div>
+```
+
+### Complete Workflow (Session 14 Update)
+
+**Step 1: Page Load & Automatic Popup**
+```csharp
+protected override async Task OnInitializedAsync() {
+    // ... load PDF and signatures ...
+    
+    // Open signature popup automatically
+    _activeSignatureTab = SignatureTabDraw;
+    _signaturePopupVisible = true;
+    _popupValidationMessage = null;
+}
+```
+
+**Features:**
+- Opens automatically on page load (no manual trigger needed)
+- Cannot be closed manually (no X button, ESC disabled, no outside-click)
+- User MUST create signature before viewing PDF
+
+**Step 2: Signature Creation Popup (DxPopup)**
+
+**Tabs:**
+1. **Zeichnen (Draw):** Canvas-based signature pad (`receiver-signature.js`)
+   - Touch-friendly: `touch-action: none`
+   - Line width: 2.5px, black (`#111`)
+   - Canvas: 560×180px, rounded corners, shadow
+
+2. **Text:** Type signature with font selection
+   - Fonts: Brush Script, Segoe Script, Lucida Handwriting, Comic Sans, Cursive
+   - Real-time preview on canvas
+
+3. **Bild (Image):** Upload PNG/JPG/WebP
+   - File input with preview
+   - Auto-resize to fit canvas
+
+**Required Fields:**
+- ? **Vor- und Nachname** (Full Name) — Red asterisk `*`
+- ? **Ort** (Place) — Red asterisk `*`
+- ? **Position** — Optional, gray "(optional)" label
+
+**Validation:**
+```csharp
+async Task SaveSignatureAsync() {
+    if (string.IsNullOrWhiteSpace(_signerFullName)) {
+        _popupValidationMessage = "Bitte geben Sie Vor- und Nachname ein.";
+        return;
+    }
+    if (string.IsNullOrWhiteSpace(_signaturePlace)) {
+        _popupValidationMessage = "Bitte geben Sie den Ort ein.";
+        return;
+    }
+    var signatureDataUrl = await GetActiveSignatureDataUrlAsync();
+    if (string.IsNullOrWhiteSpace(signatureDataUrl)) {
+        _popupValidationMessage = "Die Unterschrift ist erforderlich.";
+        return;
+    }
+    
+    // Save to session state
+    _capturedSignature = new(signatureDataUrl, _signerFullName.Trim(), 
+                            _signerPosition.Trim(), _signaturePlace.Trim());
+    _signaturePopupVisible = false;
+}
+```
+
+**Design (Modern & Clean):**
+- **Tabs:** Purple active state (`#4F46E5`), 3px bottom border
+- **Inputs:** 2px solid border (`#e9ecef`), 6px border-radius, consistent padding
+- **Canvas:** Light shadow (`0 1px 3px rgba(0,0,0,0.1)`), rounded corners
+- **Buttons:**
+  - **Erneuern:** Outline secondary with refresh icon
+  - **Speichern:** Purple gradient + checkmark icon + shadow
+- **Error:** Red left border (`4px solid #dc3545`), light red background (`#fee`)
+
+**Step 3: PDF Viewing with Signature Buttons**
+
+After popup closes:
+```csharp
+protected override async Task OnAfterRenderAsync(bool firstRender) {
+    // ... PDF initialization ...
+    
+    await RenderSignatureButtonsAsync();  // Render "Unterschreiben" buttons
+}
+```
+
+**Buttons appear at signature field positions:**
+- Purple gradient background
+- "Unterschreiben" text + pen icon
+- Hover: scale(1.05) + darker color
+- Positioned using PDF POINTS ? display pixels conversion
+
+**Step 4: Apply Signature (Click "Unterschreiben")**
+
+**C# Handler:**
+```csharp
+[JSInvokable]
+public async Task OnSignatureButtonClick(int signatureId) {
+    if (_capturedSignature == null) return;
+    
+    await JSRuntime.InvokeVoidAsync("pdfViewer.applySignature", 
+        signatureId, 
+        _capturedSignature.DataUrl,
+        _capturedSignature.FullName,
+        _capturedSignature.Position,
+        _capturedSignature.Place);
+}
+```
+
+**JavaScript Implementation:**
+```javascript
+async applySignature(signatureId, signatureDataUrl, fullName, position, place) {
+    // 1. Find and remove button
+    const button = this.signatureButtons.find(btn => 
+        btn.getAttribute('data-signature-id') == signatureId);
+    button.parentNode.removeChild(button);
+    
+    // 2. Create signature container (German standard format)
+    const signatureContainer = document.createElement('div');
+    signatureContainer.className = 'applied-signature';
+    signatureContainer.style.position = 'absolute';
+    signatureContainer.style.left = button.style.left;  // Same position as button
+    signatureContainer.style.top = button.style.top;
+    signatureContainer.style.width = '230px';
+    signatureContainer.style.backgroundColor = '#f8f9fa';
+    signatureContainer.style.border = '1px solid #dee2e6';
+    signatureContainer.style.borderRadius = '6px';
+    signatureContainer.style.padding = '12px';
+    
+    // 3. Add signature image
+    const img = document.createElement('img');
+    img.src = signatureDataUrl;
+    img.style.width = '100%';
+    img.style.maxHeight = '70px';
+    img.style.objectFit = 'contain';
+    
+    // 4. Add separator line (German standard)
+    const separator = document.createElement('div');
+    separator.style.borderTop = '1px solid #495057';
+    separator.style.marginTop = '6px';
+    separator.style.marginBottom = '8px';
+    
+    // 5. Add text information
+    const today = new Date();
+    const dateStr = today.toLocaleDateString('de-DE', { 
+        day: '2-digit', month: '2-digit', year: 'numeric' 
+    });  // "26.01.2025"
+    
+    const infoHtml = [
+        `<strong>${this.escapeHtml(fullName)}</strong>`,
+        position ? this.escapeHtml(position) : null,
+        `${this.escapeHtml(place)}, ${dateStr}`
+    ].filter(x => x).join('<br>');
+    
+    const info = document.createElement('div');
+    info.style.fontSize = '9px';
+    info.style.color = '#495057';
+    info.innerHTML = infoHtml;
+    
+    // 6. Assemble and add to layer
+    signatureContainer.appendChild(img);
+    signatureContainer.appendChild(separator);
+    signatureContainer.appendChild(info);
+    
+    document.getElementById('pdf-signature-layer').appendChild(signatureContainer);
+}
+```
+
+**German Standard Layout:**
+```
+???????????????????????????????
+?  [Signature Image]          ?  ? Base64 PNG, max 70px height
+?                             ?
+???????????????????????????????  ? 1px separator (#495057)
+?                             ?
+?  Max Mustermann (Bold)      ?  ? Name (font-weight: 600, #212529)
+?  Geschäftsführer            ?  ? Position (optional, normal weight)
+?  Berlin, 26.01.2025         ?  ? Place, Date (dd.MM.yyyy)
+?                             ?
+???????????????????????????????
+```
+
+**Step 5: Persistence & Re-rendering**
+
+- **Zoom/Page Change:** Applied signatures re-render automatically
+- **Session State:** `_capturedSignature` stored in Blazor component
+- **Limitation:** Lost on page refresh (no server-side storage)
+- **Future:** Export to PDF with actual byte stamping (requires non-GPL library)
+
+**Security:**
+```javascript
+escapeHtml(text) {
+    const div = document.createElement('div');
+    div.textContent = text;  // Browser auto-escapes
+    return div.innerHTML;
+}
+```
+Protects against XSS attacks from malicious input in Name/Position/Place fields.
+
+---
+
+### Popup Design Specification
+
+**DxPopup Properties:**
+```razor
+<DxPopup @bind-Visible="_signaturePopupVisible"
+         HeaderText="Unterschrift erstellen"
+         Width="620px"
+         MaxWidth="95vw"
+         ShowFooter="true"       <!-- REQUIRED for buttons to appear -->
+         CloseOnOutsideClick="false"
+         ShowCloseButton="false"  <!-- No X button -->
+         CloseOnEscape="false">  <!-- ESC disabled -->
+```
+
+**Tab Design:**
+- **Active Tab:** `border-bottom: 3px solid #4F46E5; color: #4F46E5; font-weight: 600;`
+- **Inactive Tab:** `color: #6c757d;`
+- **Tab Bar:** `border-bottom: 2px solid #e9ecef;`
+
+**Input Styling:**
+```css
+input, select {
+    border: 2px solid #e9ecef;
+    border-radius: 6px;
+    padding: 0.625rem;
+}
+```
+
+**Canvas Styling:**
+```css
+canvas {
+    border: 2px solid #e9ecef;
+    border-radius: 8px;
+    background: white;
+    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
+}
+```
+
+**Button Styling:**
+```css
+/* Erneuern (Renew) */
+.btn-outline-secondary {
+    border-radius: 6px;
+    padding: 0.625rem 1.25rem;
+    font-weight: 500;
+}
+
+/* Speichern (Save) */
+.btn-primary {
+    background: linear-gradient(135deg, #4F46E5 0%, #4338CA 100%);
+    border: none;
+    border-radius: 6px;
+    padding: 0.625rem 2rem;
+    font-weight: 600;
+    box-shadow: 0 2px 4px rgba(79, 70, 229, 0.3);
+}
+```
+
+**Future Enhancement Required:**
+- Replace iText7 with commercial PDF library (e.g., PSPDFKit, Syncfusion)
+- Or use server-side stamping with Azure PDF Services
+- Or accept GPL license and open-source the stamping code
+
+---
+
+
+
+
+
+
+
+
+
+

EnvelopeGenerator.API/Controllers/AnnotationController.cs

@@ -1,16 +1,19 @@
 using DigitalData.Core.Abstraction.Application.DTO;
 using DigitalData.Core.Exceptions;
+using EnvelopeGenerator.API.Extensions;
+using EnvelopeGenerator.Application.Common.Dto;
 using EnvelopeGenerator.Application.Common.Extensions;
 using EnvelopeGenerator.Application.Common.Interfaces.Services;
 using EnvelopeGenerator.Application.Common.Notifications.DocSigned;
+using EnvelopeGenerator.Application.Documents.Queries;
 using EnvelopeGenerator.Application.EnvelopeReceivers.Queries;
 using EnvelopeGenerator.Application.Histories.Queries;
 using EnvelopeGenerator.Domain.Constants;
-using EnvelopeGenerator.API.Extensions;
 using MediatR;
 using Microsoft.AspNetCore.Authentication;
 using Microsoft.AspNetCore.Authentication.Cookies;
 using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Components.Forms;
 using Microsoft.AspNetCore.Mvc;
 
 namespace EnvelopeGenerator.API.Controllers;

EnvelopeGenerator.API/Controllers/AuthController.cs

@@ -1,3 +1,4 @@
+using DigitalData.Auth.Claims;
 using EnvelopeGenerator.API.Controllers.Interfaces;
 using EnvelopeGenerator.API.Models;
 using EnvelopeGenerator.Domain.Constants;
@@ -73,4 +74,44 @@ public partial class AuthController(IOptions<AuthTokenKeys> authTokenKeyOptions,
         => role is not null && !User.IsInRole(role)
             ? Unauthorized()
             : Ok();
+
+    /// <summary>
+    /// Checks whether the caller holds a valid per-envelope receiver token for the given envelope key.
+    /// The request must carry a cookie named <c>AuthTokenSignFLOWReceiver.{envelopeKey}</c>.
+    /// </summary>
+    /// <param name="envelopeKey">The unique envelope key extracted from the route.</param>
+    /// <response code="200">Valid per-envelope token found.</response>
+    /// <response code="401">Token is missing, expired or invalid.</response>
+    [ProducesResponseType(typeof(void), StatusCodes.Status200OK)]
+    [ProducesResponseType(typeof(void), StatusCodes.Status401Unauthorized)]
+    [Authorize(Policy = AuthPolicy.Receiver)]
+    [HttpGet("check/envelope/{envelopeKey}")]
+    public IActionResult CheckEnvelopeReceiver([FromRoute] string envelopeKey) => Ok();
+
+    /// <summary>
+    /// Removes the per-envelope receiver cookie for the given envelope key.
+    /// </summary>
+    /// <param name="envelopeKey">The unique envelope key whose cookie should be deleted.</param>
+    /// <response code="200">Cookie successfully deleted.</response>
+    [ProducesResponseType(typeof(void), StatusCodes.Status200OK)]
+    [HttpPost("logout/envelope/{envelopeKey}")]
+    public IActionResult LogoutEnvelopeReceiver([FromRoute] string envelopeKey)
+    {
+        var cookieName = CookieNames.GetEnvelopeReceiverCookieName(authTokenKeys.Cookie, envelopeKey);
+        Response.Cookies.Delete(cookieName);
+        return Ok();
+    }
+
+    /// <summary>
+    /// Removes all per-envelope receiver cookies from the current request.
+    /// </summary>
+    /// <response code="200">All envelope receiver cookies successfully deleted.</response>
+    [ProducesResponseType(typeof(void), StatusCodes.Status200OK)]
+    [HttpPost("logout/envelope")]
+    public IActionResult LogoutAllEnvelopeReceivers()
+    {
+        foreach (var cookieName in Request.Cookies.Keys.Where(k => CookieNames.IsEnvelopeReceiverCookie(k, authTokenKeys.Cookie)))
+            Response.Cookies.Delete(cookieName);
+        return Ok();
+    }
 }

EnvelopeGenerator.API/Controllers/DocumentController.cs

@@ -1,3 +1,4 @@
+using DigitalData.Auth.Claims;
 using EnvelopeGenerator.API.Controllers.Interfaces;
 using EnvelopeGenerator.API.Extensions;
 using EnvelopeGenerator.Application.Documents.Queries;
@@ -14,10 +15,9 @@ namespace EnvelopeGenerator.API.Controllers;
 /// <remarks>
 /// Initializes a new instance of the <see cref="DocumentController"/> class.
 /// </remarks>
-[Authorize]
 [ApiController]
 [Route("api/[controller]")]
-public class DocumentController(IMediator mediator, IAuthorizationService authService) : ControllerBase, IAuthController
+public class DocumentController(IMediator mediator, IAuthorizationService authService, ILogger<DocumentController> logger) : ControllerBase, IAuthController
 {
     /// <summary>
     /// 
@@ -60,4 +60,25 @@ public class DocumentController(IMediator mediator, IAuthorizationService authSe
 
         return Unauthorized();
     }
+
+    /// <summary>
+    /// Gets the document for the specified envelope key.
+    /// </summary>
+    /// <param name="envelopeKey"></param>
+    /// <param name="cancel"></param>
+    /// <returns></returns>
+    [Authorize(Policy = AuthPolicy.Receiver)]
+    [HttpGet("{envelopeKey}")]
+    public async Task<IActionResult> GetDocumentOfReceiver(string envelopeKey, CancellationToken cancel)
+    {
+        int envelopeId = User.GetEnvelopeIdOfReceiver();
+
+        var senderDoc = await mediator.Send(new ReadDocumentQuery() { EnvelopeId = envelopeId }, cancel);
+
+        if (senderDoc.ByteData is not byte[] senderDocByte)
+            return NotFound("Document is empty.");
+
+        Response.Headers.ContentDisposition = $"inline; filename=\"{envelopeKey}.pdf\"";
+        return File(senderDocByte, "application/pdf");
+    }
 }

EnvelopeGenerator.API/Controllers/EnvelopeController.cs

@@ -71,7 +71,6 @@ public class EnvelopeController : ControllerBase
     [HttpGet("doc-result")]
     public async Task<IActionResult> GetDocResultAsync([FromQuery] ReadEnvelopeQuery query, [FromQuery] bool view = false)
     {
-        query.IncludeDocResult = true;
         var envelopes = await _mediator.Send(query.Authorize(User.GetId()));
         var envelope = envelopes.FirstOrDefault();
 
@@ -99,7 +98,7 @@ public class EnvelopeController : ControllerBase
     [HttpPost]
     public async Task<IActionResult> CreateAsync([FromBody] CreateEnvelopeCommand command)
     {
-        var res = await _mediator.Send(command.Authorize(User.GetId()));
+        var res = await _mediator.Send(command.WithAuth(User.GetId()));
 
         if (res is null)
         {

EnvelopeGenerator.API/Controllers/EnvelopeReceiverController.cs

@@ -14,6 +14,7 @@ using EnvelopeGenerator.Application.Common.SQL;
 using EnvelopeGenerator.Application.Common.Dto.Receiver;
 using EnvelopeGenerator.Application.Common.Interfaces.SQLExecutor;
 using EnvelopeGenerator.API.Extensions;
+using EnvelopeGenerator.Domain.Constants;
 
 namespace EnvelopeGenerator.API.Controllers;
 
@@ -73,6 +74,24 @@ public class EnvelopeReceiverController : ControllerBase
         return Ok(result);
     }
 
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="envelopeKey"></param>
+    /// <param name="cancel"></param>
+    /// <returns></returns>
+    [Authorize(Policy = AuthPolicy.Receiver)]
+    [HttpGet("{envelopeKey}")]
+    public async Task<IActionResult> GetEnvelopeReceiverOfReceiver([FromRoute] string envelopeKey, CancellationToken cancel)
+    {
+        var er = await _mediator.Send(new ReadEnvelopeReceiverQuery()
+        {
+            Key = envelopeKey
+        }, cancel);
+
+        return Ok(er.SingleOrDefault());
+    }
+
     /// <summary>
     /// Ruft den Namen des zuletzt verwendeten Empfängers basierend auf der angegebenen E-Mail-Adresse ab.
     /// </summary>

EnvelopeGenerator.API/Controllers/SignatureController.cs

@@ -0,0 +1,57 @@
+using EnvelopeGenerator.API.Extensions;
+using EnvelopeGenerator.Application.Common.Dto;
+using EnvelopeGenerator.Application.Common.Extensions;
+using EnvelopeGenerator.Application.Documents.Queries;
+using EnvelopeGenerator.Domain.Constants;
+using MediatR;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+
+namespace EnvelopeGenerator.API.Controllers;
+
+/// <summary>
+/// 
+/// </summary>
+[Authorize(Policy = AuthPolicy.Receiver)]
+[ApiController]
+[Route("api/[controller]")]
+public class SignatureController : ControllerBase
+{
+    private readonly IMediator _mediator;
+
+    /// <summary>
+    /// Initializes a new instance of <see cref="SignatureController"/>.
+    /// </summary>
+    public SignatureController(IMediator mediator)
+    {
+        _mediator = mediator;
+    }
+
+    //TODO: update to use signature query
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="envelopeKey"></param>
+    /// <param name="cancel"></param>
+    /// <returns></returns>
+    [Authorize(Policy = AuthPolicy.Receiver)]
+    [HttpGet("{envelopeKey}")]
+    public async Task<IActionResult> GetAnnotsOfReceiver(string envelopeKey, CancellationToken cancel)
+    {
+        int envelopeId = User.GetEnvelopeIdOfReceiver();
+
+        int receiverId = User.GetReceiverIdOfReceiver();
+
+        var doc = await _mediator.Send(new ReadDocumentQuery() { EnvelopeId = envelopeId }, cancel);
+
+        if (doc.Elements is not IEnumerable<SignatureDto> docSignatures)
+            return NotFound("Document is empty.");
+
+        var rcvSignatures = docSignatures.Where(s => s.ReceiverId == receiverId).ToList();
+
+        if (rcvSignatures is null)
+            return NotFound("No signatures found for the current receiver.");
+        else
+            return Ok(rcvSignatures);
+    }
+}

EnvelopeGenerator.API/Documentation/AuthProxyDocumentFilter.cs

@@ -16,6 +16,12 @@ public sealed class AuthProxyDocumentFilter : IDocumentFilter
     /// <param name="swaggerDoc"></param>
     /// <param name="context"></param>
     public void Apply(OpenApiDocument swaggerDoc, DocumentFilterContext context)
+    {
+        AddLoginOperation(swaggerDoc, context);
+        AddEnvelopeReceiverLoginOperation(swaggerDoc, context);
+    }
+
+    private static void AddLoginOperation(OpenApiDocument swaggerDoc, DocumentFilterContext context)
     {
         const string path = "/api/auth";
 
@@ -67,4 +73,51 @@ public sealed class AuthProxyDocumentFilter : IDocumentFilter
             }
         };
     }
+
+    private static void AddEnvelopeReceiverLoginOperation(OpenApiDocument swaggerDoc, DocumentFilterContext context)
+    {
+        const string path = "/api/Auth/envelope-receiver/{key}";
+
+        var bodySchema = context.SchemaGenerator.GenerateSchema(typeof(EnvelopeReceiverLogin), context.SchemaRepository);
+
+        var operation = new OpenApiOperation
+        {
+            Summary = "Envelope receiver login (auth-hub proxy)",
+            Description = "Proxies the envelope receiver login to the auth service. " +
+                          "The `cookie` query parameter is always forwarded as `true` so the auth service sets the per-envelope cookie automatically.",
+            Tags = [new() { Name = "Auth" }],
+            Parameters =
+            {
+                new OpenApiParameter
+                {
+                    Name = "key",
+                    In = ParameterLocation.Path,
+                    Required = true,
+                    Schema = new OpenApiSchema { Type = "string" },
+                    Description = "The unique envelope receiver key."
+                }
+            },
+            RequestBody = new OpenApiRequestBody
+            {
+                Required = false,
+                Content =
+                {
+                    ["multipart/form-data"] = new OpenApiMediaType { Schema = bodySchema }
+                }
+            },
+            Responses =
+            {
+                ["200"] = new OpenApiResponse { Description = "OK – per-envelope cookie set by auth service." },
+                ["401"] = new OpenApiResponse { Description = "Unauthorized – invalid or missing access code." }
+            }
+        };
+
+        swaggerDoc.Paths[path] = new OpenApiPathItem
+        {
+            Operations =
+            {
+                [OperationType.Post] = operation
+            }
+        };
+    }
 }

EnvelopeGenerator.API/EnvelopeGenerator.API.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFrameworks>net9.0</TargetFrameworks>
+    <TargetFrameworks>net8.0</TargetFrameworks>
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
@@ -10,9 +10,9 @@
     <Authors>Digital Data GmbH</Authors>
     <Company>Digital Data GmbH</Company>
     <Product>EnvelopeGenerator.GeneratorAPI</Product>
-    <Version>1.2.3</Version>
-    <FileVersion>1.2.3</FileVersion>
-    <AssemblyVersion>1.2.3</AssemblyVersion>
+    <Version>1.4.0</Version>
+    <FileVersion>1.4.0</FileVersion>
+    <AssemblyVersion>1.4.0</AssemblyVersion>
     <PackageOutputPath>Copyright © 2025 Digital Data GmbH. All rights reserved.</PackageOutputPath>
 	<DocumentationFile>bin\$(Configuration)\$(TargetFramework)\$(AssemblyName).xml</DocumentationFile>
   </PropertyGroup>
@@ -30,11 +30,16 @@
 
   <ItemGroup>
     <PackageReference Include="AspNetCore.Scalar" Version="1.1.8" />
+    <PackageReference Include="DigitalData.Auth.Claims" Version="1.0.3" />
     <PackageReference Include="DigitalData.Auth.Client" Version="1.3.7" />
     <PackageReference Include="DigitalData.Core.API" Version="2.2.1" />
     <PackageReference Include="HtmlSanitizer" Version="9.0.892" />
-    <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="9.0.4" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="9.0.6" />
+    <PackageReference Include="itext" Version="8.0.5" />
+    <PackageReference Include="itext.bouncy-castle-adapter" Version="8.0.5" />
+    <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="9.0.4" Condition="'$(TargetFramework)' == 'net9.0'" />
+    <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="8.0.11" Condition="'$(TargetFramework)' == 'net8.0'" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="9.0.6" Condition="'$(TargetFramework)' == 'net9.0'" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="8.0.17" Condition="'$(TargetFramework)' == 'net8.0'" />
     <PackageReference Include="Microsoft.Identity.Client" Version="4.82.1" />
     <PackageReference Include="NLog" Version="5.2.5" />
     <PackageReference Include="NLog.Web.AspNetCore" Version="5.3.0" />
@@ -71,6 +76,7 @@
     <ProjectReference Include="..\EnvelopeGenerator.Application\EnvelopeGenerator.Application.csproj" />
     <ProjectReference Include="..\EnvelopeGenerator.Domain\EnvelopeGenerator.Domain.csproj" />
     <ProjectReference Include="..\EnvelopeGenerator.Infrastructure\EnvelopeGenerator.Infrastructure.csproj" />
+    <ProjectReference Include="..\EnvelopeGenerator.PdfEditor\EnvelopeGenerator.PdfEditor.csproj" />
   </ItemGroup>
 
 </Project>

EnvelopeGenerator.API/Extensions/ReceiverClaimExtensions.cs

@@ -11,6 +11,11 @@ namespace EnvelopeGenerator.API.Extensions;
 /// </summary>
 public static class ReceiverClaimExtensions
 {
+    private static readonly string[] EnvelopeIdClaimTypes = [EnvelopeClaimTypes.Id, "envelope_id", "EnvelopeId"];
+    private static readonly string[] ReceiverIdClaimTypes = ["receiver_id", "ReceiverId"];
+    private static readonly string[] EnvelopeUuidClaimTypes = [ClaimTypes.NameIdentifier, "envelope_uuid", "EnvelopeUuid"];
+    private static readonly string[] ReceiverSignatureClaimTypes = [ClaimTypes.Hash, "receiver_sig", "ReceiverSignature"];
+
     private static string GetRequiredClaimOfReceiver(this ClaimsPrincipal user, string claimType)
     {
         var value = user.FindFirstValue(claimType);
@@ -27,15 +32,32 @@ public static class ReceiverClaimExtensions
         throw new InvalidOperationException(message);
     }
 
+    private static string GetRequiredClaimOfReceiver(this ClaimsPrincipal user, params string[] claimTypes)
+    {
+        foreach (var claimType in claimTypes.Where(t => !string.IsNullOrWhiteSpace(t)).Distinct())
+        {
+            var value = user.FindFirstValue(claimType);
+            if (!string.IsNullOrWhiteSpace(value))
+                return value;
+        }
+
+        var identity = user.Identity;
+        var principalName = identity?.Name ?? "(anonymous)";
+        var authType = identity?.AuthenticationType ?? "(none)";
+        var availableClaims = string.Join(", ", user.Claims.Select(c => $"{c.Type}={c.Value}"));
+        var message = $"Required claim(s) '{string.Join("', '", claimTypes)}' are missing for user '{principalName}' (auth: {authType}). Available claims: [{availableClaims}].";
+        throw new InvalidOperationException(message);
+    }
+
     /// <summary>
     /// Gets the authenticated envelope UUID from the claims.
     /// </summary>
-    public static string GetEnvelopeUuidOfReceiver(this ClaimsPrincipal user) => user.GetRequiredClaimOfReceiver(ClaimTypes.NameIdentifier);
+    public static string GetEnvelopeUuidOfReceiver(this ClaimsPrincipal user) => user.GetRequiredClaimOfReceiver(EnvelopeUuidClaimTypes);
 
     /// <summary>
     /// Gets the authenticated receiver signature from the claims.
     /// </summary>
-    public static string GetReceiverSignatureOfReceiver(this ClaimsPrincipal user) => user.GetRequiredClaimOfReceiver(ClaimTypes.Hash);
+    public static string GetReceiverSignatureOfReceiver(this ClaimsPrincipal user) => user.GetRequiredClaimOfReceiver(ReceiverSignatureClaimTypes);
 
     /// <summary>
     /// Gets the authenticated receiver display name from the claims.
@@ -57,15 +79,32 @@ public static class ReceiverClaimExtensions
     /// </summary>
     public static int GetEnvelopeIdOfReceiver(this ClaimsPrincipal user)
     {
-        var envIdStr = user.GetRequiredClaimOfReceiver(EnvelopeClaimTypes.Id);
+        var envIdStr = user.GetRequiredClaimOfReceiver(EnvelopeIdClaimTypes);
         if (!int.TryParse(envIdStr, out var envId))
         {
-            throw new InvalidOperationException($"Claim '{EnvelopeClaimTypes.Id}' is not a valid integer.");
+            throw new InvalidOperationException($"Claim '{"envelope_id"}' is not a valid integer.");
         }
 
         return envId;
     }
 
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="user"></param>
+    /// <returns></returns>
+    /// <exception cref="InvalidOperationException"></exception>
+    public static int GetReceiverIdOfReceiver(this ClaimsPrincipal user)
+    {
+        var rcvIdStr = user.GetRequiredClaimOfReceiver(ReceiverIdClaimTypes);
+        if (!int.TryParse(rcvIdStr, out var rcvId))
+        {
+            throw new InvalidOperationException($"Claim '{"receiver_id"}' is not a valid integer.");
+        }
+
+        return rcvId;
+    }
+
     /// <summary>
     /// Signs in an envelope receiver using cookie authentication and attaches envelope claims.
     /// </summary>

EnvelopeGenerator.API/Models/EnvelopeReceiverLogin.cs

@@ -0,0 +1,7 @@
+namespace EnvelopeGenerator.API.Models;
+
+/// <summary>
+/// Request body for the envelope-receiver login endpoint.
+/// </summary>
+/// <param name="AccessCode">The access code sent to the receiver.</param>
+public record EnvelopeReceiverLogin(string? AccessCode = null);

EnvelopeGenerator.API/Program.cs

@@ -19,6 +19,7 @@ using DigitalData.Core.Abstractions.Security.Extensions;
 using EnvelopeGenerator.API.Middleware;
 using NLog.Web;
 using NLog;
+using DigitalData.Auth.Claims;
 
 var logger = LogManager.Setup().LoadConfigurationFromAppSettings().GetCurrentClassLogger();
 logger.Info("Logging initialized!");
@@ -110,7 +111,9 @@ try
 
         options.DocumentFilter<EnvelopeGenerator.API.Documentation.AuthProxyDocumentFilter>();
     });
+#if NET9_0_OR_GREATER
     builder.Services.AddOpenApi();
+#endif
 
     //Add EF Core dbcontext
     var useDbMigration = Environment.GetEnvironmentVariable("MIGRATION_TEST_MODE") == true.ToString() || config.GetValue<bool>("UseDbMigration");
@@ -126,6 +129,9 @@ try
 
     var authTokenKeys = config.GetOrDefault<AuthTokenKeys>();
 
+    // Scheme name used for per-envelope receiver JWT authentication.
+    const string EnvelopeReceiverScheme = "EnvelopeReceiverJwt";
+
     builder.Services.AddAuthentication(options =>
     {
         options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
@@ -163,6 +169,61 @@ try
                     return Task.CompletedTask;
                 }
             };
+        })
+        // Per-envelope receiver scheme: reads the JWT from the cookie named
+        // AuthTokenSignFLOWReceiver.{envelope_key} where envelope_key is the
+        // last path segment of the request URL.
+        // This enables simultaneous authentication for multiple envelopes
+        // within the same browser session.
+        .AddJwtBearer(EnvelopeReceiverScheme, opt =>
+        {
+            opt.TokenValidationParameters = new TokenValidationParameters
+            {
+                ValidateIssuerSigningKey = true,
+                IssuerSigningKeyResolver = (token, securityToken, identifier, parameters) =>
+                {
+                    var clientParams = deferredProvider.GetOptions<ClientParams>();
+                    var publicKey = clientParams!.PublicKeys.Get(authTokenKeys.Issuer, authTokenKeys.Audience);
+                    return [publicKey.SecurityKey];
+                },
+                ValidateIssuer = true,
+                ValidIssuer = authTokenKeys.Issuer,
+                ValidateAudience = true,
+                ValidAudience = authTokenKeys.Audience,
+            };
+
+            opt.Events = new JwtBearerEvents
+            {
+                OnMessageReceived = context =>
+                {
+                    var paths = context.Request.Path.Value?.Split('/', StringSplitOptions.RemoveEmptyEntries);
+
+                    // Derive the envelope key from the last route segment: /{envelope_key}
+                    var envelopeKey = paths?.LastOrDefault();
+
+                    if (envelopeKey is not null)
+                    {
+                        var cookieName = CookieNames.GetEnvelopeReceiverCookieName(authTokenKeys.Cookie, envelopeKey);
+                        if (context.Request.Cookies.TryGetValue(cookieName, out var cookieToken) && cookieToken is not null)
+                            context.Token = cookieToken;
+                    }
+
+                    return Task.CompletedTask;
+                },
+                OnTokenValidated = context =>
+                {
+                    var paths = context.Request.Path.Value?.Split('/', StringSplitOptions.RemoveEmptyEntries);
+                    var envelopeKey = paths?.LastOrDefault();
+
+                    var sub = context.Principal?.FindFirst(System.Security.Claims.ClaimTypes.NameIdentifier)?.Value
+                           ?? context.Principal?.FindFirst("sub")?.Value;
+
+                    if (envelopeKey is null || sub != envelopeKey)
+                        context.Fail("Envelope key in the path does not match the token subject.");
+
+                    return Task.CompletedTask;
+                }
+            };
         });
 
     // Authentication
@@ -182,8 +243,13 @@ try
             policy.RequireRole(Role.Sender, Role.Receiver.Full))
         .AddPolicy(AuthPolicy.Sender, policy =>
             policy.RequireRole(Role.Sender))
+        // Per-envelope policy: uses the dedicated EnvelopeReceiverJwt scheme so it
+        // never conflicts with the default JwtBearer scheme.
         .AddPolicy(AuthPolicy.Receiver, policy =>
-            policy.RequireRole(Role.Receiver.Full))
+            policy
+                .AddAuthenticationSchemes(EnvelopeReceiverScheme)
+                .RequireAuthenticatedUser()
+            .RequireRole(Role.Receiver.Full, "receiver"))
         .AddPolicy(AuthPolicy.ReceiverTFA, policy =>
             policy.RequireRole(Role.Receiver.TFA));
 
@@ -224,7 +290,9 @@ try
 
     app.UseMiddleware<ExceptionHandlingMiddleware>();
 
+#if NET9_0_OR_GREATER
     app.MapOpenApi();
+#endif
 
     // Configure the HTTP request pipeline.
     if (app.Environment.IsDevelopment() || (app.IsDevOrDiP() && config.GetValue<bool>("UseSwagger")))
@@ -258,9 +326,11 @@ try
     app.UseAuthentication();
     app.UseAuthorization();
 
-    app.MapReverseProxy();
     app.MapControllers();
 
+    // Catch-all YARP proxy — only forward requests that are not swagger/scalar/openapi paths.
+    app.MapReverseProxy();
+
     app.Run();
 }
 catch (Exception ex)

EnvelopeGenerator.API/Properties/PublishProfiles/IISProfileNet8.pubxml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+https://go.microsoft.com/fwlink/?LinkID=208121.
+-->
+<Project>
+  <PropertyGroup>
+    <WebPublishMethod>Package</WebPublishMethod>
+    <LastUsedBuildConfiguration>Release</LastUsedBuildConfiguration>
+    <LastUsedPlatform>Any CPU</LastUsedPlatform>
+    <SiteUrlToLaunchAfterPublish />
+    <LaunchSiteAfterPublish>true</LaunchSiteAfterPublish>
+    <ExcludeApp_Data>false</ExcludeApp_Data>
+    <ProjectGuid>5e0e17c0-ff5a-4246-bf87-1add85376a27</ProjectGuid>
+    <DesktopBuildPackageLocation>M:\App&amp;Service\0 DD - Smart UP\signFLOW\API\net8\$(Version)\EnvelopeGenerator.API.zip</DesktopBuildPackageLocation>
+    <PackageAsSingleFile>true</PackageAsSingleFile>
+    <DeployIisAppPath>EnvelopeGenerator</DeployIisAppPath>
+    <_TargetId>IISWebDeployPackage</_TargetId>
+    <TargetFramework>net8.0</TargetFramework>
+  </PropertyGroup>
+</Project>

EnvelopeGenerator.API/appsettings.Development.json

@@ -4,6 +4,17 @@
     "Default": "Information",
     "Microsoft.AspNetCore": "Warning"
   }
+},
+"ReverseProxy": {
+  "Clusters": {
+    "receiver-ui": {
+      "Destinations": {
+        "primary": {
+          "Address": "https://localhost:52936"
+        }
+      }
+    }
+  }
 },
   "AuthClientParams": {
     "Url": "http://172.24.12.39:9090/auth-hub",

EnvelopeGenerator.API/appsettings.json

@@ -1,6 +1,6 @@
 {
   "UseSwagger": true,
-  "UseDbMigration": true,
+  "UseDbMigration": false,
   "DiPMode": true,
   "Logging": {
     "LogLevel": {

EnvelopeGenerator.API/yarp.json

@@ -1,6 +1,135 @@
 {
 "ReverseProxy": {
   "Routes": {
+    "receiver-ui-receiver": {
+      "ClusterId": "receiver-ui",
+      "Order": 100,
+      "Match": {
+        "Path": "/receiver/{**catch-all}",
+        "Methods": [ "GET", "HEAD" ]
+      }
+    },
+    "receiver-ui-login": {
+      "ClusterId": "receiver-ui",
+      "Order": 100,
+      "Match": {
+        "Path": "/login/{**catch-all}",
+        "Methods": [ "GET", "HEAD" ]
+      }
+    },
+    "receiver-ui-sender": {
+      "ClusterId": "receiver-ui",
+      "Order": 100,
+      "Match": {
+        "Path": "/sender/{**catch-all}",
+        "Methods": [ "GET", "HEAD" ]
+      }
+    },
+    "receiver-ui-envelope": {
+      "ClusterId": "receiver-ui",
+      "Order": 100,
+      "Match": {
+        "Path": "/envelope/{EnvelopeKey}",
+        "Methods": [ "GET", "HEAD" ]
+      },
+      "Transforms": [
+        { "PathSet": "/index.html" }
+      ]
+    },
+    "receiver-ui-blazor-framework": {
+      "ClusterId": "receiver-ui",
+      "Order": 50,
+      "Match": {
+        "Path": "/_framework/{**catch-all}",
+        "Methods": [ "GET", "HEAD" ]
+      }
+    },
+    "receiver-ui-blazor-content": {
+      "ClusterId": "receiver-ui",
+      "Order": 50,
+      "Match": {
+        "Path": "/_content/{**catch-all}",
+        "Methods": [ "GET", "HEAD" ]
+      }
+    },
+    "receiver-ui-static-css": {
+      "ClusterId": "receiver-ui",
+      "Order": 200,
+      "Match": {
+        "Path": "/css/{**catch-all}",
+        "Methods": [ "GET", "HEAD" ]
+      },
+      "Transforms": [
+        {
+          "ResponseHeader": "Cache-Control",
+          "Set": "no-cache, no-store, must-revalidate",
+          "When": "Always"
+        }
+      ]
+    },
+    "receiver-ui-static-js": {
+      "ClusterId": "receiver-ui",
+      "Order": 200,
+      "Match": {
+        "Path": "/js/{**catch-all}",
+        "Methods": [ "GET", "HEAD" ]
+      },
+      "Transforms": [
+        {
+          "ResponseHeader": "Cache-Control",
+          "Set": "no-cache, no-store, must-revalidate",
+          "When": "Always"
+        }
+      ]
+    },
+    "receiver-ui-fake-data": {
+      "ClusterId": "receiver-ui",
+      "Order": 200,
+      "Match": {
+        "Path": "/fake-data/{**catch-all}",
+        "Methods": [ "GET", "HEAD" ]
+      }
+    },
+    "receiver-ui-appsettings": {
+      "ClusterId": "receiver-ui",
+      "Order": 50,
+      "Match": {
+        "Path": "/appsettings.json",
+        "Methods": [ "GET", "HEAD" ]
+      }
+    },
+    "receiver-ui-appsettings-dev": {
+      "ClusterId": "receiver-ui",
+      "Order": 50,
+      "Match": {
+        "Path": "/appsettings.Development.json",
+        "Methods": [ "GET", "HEAD" ]
+      }
+    },
+    "receiver-ui-styles": {
+      "ClusterId": "receiver-ui",
+      "Order": 50,
+      "Match": {
+        "Path": "/EnvelopeGenerator.ReceiverUI.styles.css",
+        "Methods": [ "GET", "HEAD" ]
+      }
+    },
+    "receiver-ui-fonts": {
+      "ClusterId": "receiver-ui",
+      "Order": 200,
+      "Match": {
+        "Path": "/fonts/{**catch-all}",
+        "Methods": [ "GET", "HEAD" ]
+      }
+    },
+    "receiver-ui-images": {
+      "ClusterId": "receiver-ui",
+      "Order": 200,
+      "Match": {
+        "Path": "/images/{**catch-all}",
+        "Methods": [ "GET", "HEAD" ]
+      }
+    },
     "auth-login": {
       "ClusterId": "auth-hub",
       "Match": {
@@ -10,9 +139,30 @@
       "Transforms": [
         { "PathSet": "/api/auth/sign-flow" }
       ]
+    },
+    "auth-envelope-receiver-login": {
+      "ClusterId": "auth-hub",
+      "Match": {
+        "Path": "/api/Auth/envelope-receiver/{key}",
+        "Methods": [ "POST" ]
+      },
+      "Transforms": [
+        { "PathPattern": "/api/auth/envelope-receiver/{key}" },
+        {
+          "QueryValueParameter": "cookie",
+          "Set": "true"
+        }
+      ]
     }
   },
     "Clusters": {
+      "receiver-ui": {
+        "Destinations": {
+          "primary": {
+            "Address": "https://localhost:52936"
+          }
+        }
+      },
       "auth-hub": {
         "Destinations": {
           "primary": {
@@ -23,3 +173,4 @@
     }
   }
 }
+

EnvelopeGenerator.Application/Common/CacheKey.cs

@@ -1,13 +0,0 @@
-namespace EnvelopeGenerator.Application.Common;
-
-// TODO: merge other cache keys here as well, e.g. for templates, etc.
-/// <summary>
-/// 
-/// </summary>
-public static class CacheKey
-{
-    /// <summary>
-    /// 
-    /// </summary>
-    public static readonly Guid DefaultConfig = Guid.NewGuid();
-}

EnvelopeGenerator.Application/Common/Dto/AnnotationDto.cs

@@ -8,42 +8,77 @@ public record AnnotationCreateDto
     /// <summary>
     /// 
     /// </summary>
-    public int ElementId { get; init; }
+    public long Id { get; set; }
 
     /// <summary>
     /// 
     /// </summary>
-    public string Name { get; init; } = null!;
+    [Obsolete("Not required for DevExpress")]
+    public int ElementId { get; init; } = -1;
 
     /// <summary>
     /// 
     /// </summary>
-    public string Value { get; init; } = null!;
+    [Obsolete("Not required for DevExpress")]
+    public string Name { get; init; } = string.Empty;
 
     /// <summary>
     /// 
     /// </summary>
-    public string Type { get; init; } = null!;
+    [Obsolete("Not required for DevExpress")]
+    public string Value { get; init; } = string.Empty;
 
     /// <summary>
     /// 
     /// </summary>
+    [Obsolete("Not required for DevExpress")]
+    public string Type { get; init; } = string.Empty;
+
+    /// <summary>
+    /// Horizontal position of the signature field on the page.
+    /// <br/><br/>
+    /// <b>Unit:</b> INCHES (GdPicture14 native), origin at the <b>top-left</b> corner of the page, X increases to the right.
+    /// <br/>
+    /// <b>Conversion to DevExpress:</b> Multiply by 100 (DX uses 1/100 inch).
+    /// Convert: <c>xDX = xInches * 100.0</c>
+    /// <br/>
+    /// <b>Conversion to PDF Points:</b> Multiply by 72 (PSPDFKit, iText7 use 1/72 inch).
+    /// Convert: <c>xPt = xInches * 72.0</c>
+    /// </summary>
     public double? X { get; init; }
 
     /// <summary>
-    /// 
+    /// Vertical position of the signature field on the page.
+    /// <br/><br/>
+    /// <b>Unit:</b> INCHES (GdPicture14 native), origin at the <b>top-left</b> corner of the page, Y increases downward.
+    /// <br/>
+    /// <b>Conversion to DevExpress:</b> Multiply by 100 (DX uses 1/100 inch).
+    /// Convert: <c>yDX = yInches * 100.0</c>
+    /// <br/>
+    /// <b>Conversion to PDF Points (top-left origin):</b> Multiply by 72.
+    /// Convert: <c>yPt = yInches * 72.0</c>
+    /// <br/>
+    /// <b>Conversion to PDF Points (bottom-left origin - iText7):</b> Y-flip required.
+    /// Convert: <c>yPt = (pageHeightInches - yInches - elemHeightInches) * 72.0</c>
     /// </summary>
     public double? Y { get; init; }
 
     /// <summary>
     /// 
     /// </summary>
+    [Obsolete("Not required for DevExpress")]
     public double? Width { get; init; }
 
     /// <summary>
     /// 
     /// </summary>
+    [Obsolete("Not required for DevExpress")]
     public double? Height { get; init; }
+
+    /// <summary>
+    /// Added to eliminate the need for SignatureDto in DevExpress 
+    /// </summary>
+    public int? Page { get; init; }
 }
 
 /// <summary>

EnvelopeGenerator.Application/Common/Dto/ConfigDto.cs

@@ -8,11 +8,6 @@ namespace EnvelopeGenerator.Application.Common.Dto;
 [ApiExplorerSettings(IgnoreApi = true)]
 public class ConfigDto
 {
-    /// <summary>
-    /// Gets or sets the default document path.
-    /// </summary>
-    public string? DocumentPath { get; set; }
-
     /// <summary>
     /// Gets or sets the sending profile identifier.
     /// </summary>
@@ -31,30 +26,5 @@ public class ConfigDto
     /// <summary>
     /// Gets or sets the path where exports will be saved.
     /// </summary>
-    public string ExportPath { get; set; } = null!;
-
-    /// <summary>
-    /// Gets or sets the creation timestamp.
-    /// </summary>
-    public DateTime AddedWhen { get; set; }
-
-    /// <summary>
-    /// Gets or sets the last update timestamp.
-    /// </summary>
-    public DateTime? ChangedWhen { get; set; }
-
-    /// <summary>
-    /// Gets or sets the legacy tinyint GUID field.
-    /// </summary>
-    public byte Guid { get; set; }
-
-    /// <summary>
-    /// Gets or sets whether default TFA is enabled.
-    /// </summary>
-    public bool DefTfaEnabled { get; set; }
-
-    /// <summary>
-    /// Gets or sets whether default TFA uses phone.
-    /// </summary>
-    public bool DefTfaWithPhone { get; set; }
+    public string? ExportPath { get; set; }
 }

EnvelopeGenerator.Application/Common/Dto/EnvelopeDto.cs

@@ -1,6 +1,5 @@
 using DigitalData.EmailProfilerDispatcher.Abstraction.Attributes;
 using DigitalData.UserManager.Application.DTOs.User;
-using EnvelopeGenerator.Application.Common.Dto.EnvelopeReceiver;
 using EnvelopeGenerator.Domain.Constants;
 using EnvelopeGenerator.Domain.Entities;
 using EnvelopeGenerator.Domain.Interfaces;
@@ -45,16 +44,6 @@ public record EnvelopeDto : IEnvelope
     [TemplatePlaceholder("[MESSAGE]")]
     public string Message { get; set; } = string.Empty;
 
-    /// <summary>
-    /// 
-    /// </summary>
-    public DateTime? ExpiresWhen { get; set; }
-
-    /// <summary>
-    /// 
-    /// </summary>
-    public DateTime? ExpiresWarningWhen { get; set; }
-
     /// <summary>
     /// 
     /// </summary>
@@ -71,11 +60,6 @@ public record EnvelopeDto : IEnvelope
     [TemplatePlaceholder("[DOCUMENT_TITLE]")]
     public string Title { get; set; } = string.Empty;
 
-    /// <summary>
-    /// Default value is string.Empty
-    /// </summary>
-    public string? Comment { get; set; }
-
     /// <summary>
     /// 
     /// </summary>
@@ -86,30 +70,17 @@ public record EnvelopeDto : IEnvelope
     /// </summary>
     public string Language { get; set; } = "de-DE";
 
-    /// <summary>
-    /// 
-    /// </summary>
-    public bool SendReminderEmails { get; set; }
-
-    /// <summary>
-    /// 
-    /// </summary>
-    public int? FirstReminderDays { get; set; }
-
-    /// <summary>
-    /// 
-    /// </summary>
-    public int? ReminderIntervalDays { get; set; }
-
     /// <summary>
     /// 
     /// </summary>
     public int? EnvelopeTypeId { get; set; }
 
+    // TODO: use ReadAndConfirm property name
     /// <summary>
     /// 
     /// </summary>
-    public bool ReadOnly => EnvelopeTypeId == 2;
+    [Obsolete("Use EnvelopeExtensions.IsReadAndConfirm extension metot instead.")]
+    public bool ReadOnly => this.IsReadAndConfirm();
 
     /// <summary>
     /// 
@@ -121,26 +92,6 @@ public record EnvelopeDto : IEnvelope
     /// </summary>
     public bool UseAccessCode { get; set; } = true;
 
-    /// <summary>
-    /// 
-    /// </summary>
-    public int? FinalEmailToCreator { get; set; }
-
-    /// <summary>
-    /// 
-    /// </summary>
-    public int? FinalEmailToReceivers { get; set; }
-
-    /// <summary>
-    /// 
-    /// </summary>
-    public int? ExpiresWhenDays { get; set; }
-
-    /// <summary>
-    /// 
-    /// </summary>
-    public int? ExpiresWarningWhenDays { get; set; }
-
     /// <summary>
     /// 
     /// </summary>
@@ -175,9 +126,4 @@ public record EnvelopeDto : IEnvelope
     /// 
     /// </summary>
     public IEnumerable<DocumentDto>? Documents { get; set; }
-
-    /// <summary>
-    /// 
-    /// </summary>
-    public IEnumerable<EnvelopeReceiverDto>? EnvelopeReceivers { get; set; }
 }

EnvelopeGenerator.Application/Common/Dto/SignatureDto.cs

@@ -1,4 +1,5 @@
-using EnvelopeGenerator.Domain.Interfaces;
+using EnvelopeGenerator.Domain.Constants;
+using EnvelopeGenerator.Domain.Interfaces;
 using Microsoft.AspNetCore.Mvc;
 
 namespace EnvelopeGenerator.Application.Common.Dto;
@@ -93,4 +94,14 @@ public class SignatureDto : ISignature
     /// Gets or sets the left position of the element (in layout terms).
     /// </summary>
     public double Left => X;
+
+    /// <summary>
+    /// 
+    /// </summary>
+    public IEnumerable<AnnotationDto>? Annotations { get; set; }
+
+    /// <summary>
+    /// 
+    /// </summary>
+    public SenderAppType SenderAppType { get; set; } = SenderAppType.LegacyFormApp;
 }

EnvelopeGenerator.Application/Common/Extensions/AutoMapperAuditingExtensions.cs

@@ -13,12 +13,12 @@ public static class AutoMapperAuditingExtensions
     /// </summary>
     public static IMappingExpression<TSource, TDestination> MapAddedWhen<TSource, TDestination>(this IMappingExpression<TSource, TDestination> expression)
         where TDestination : IHasAddedWhen
-        => expression.ForMember(dest => dest.AddedWhen, opt => opt.MapFrom(_ => DateTime.UtcNow));
+        => expression.ForMember(dest => dest.AddedWhen, opt => opt.MapFrom(_ => DateTime.Now));
 
     /// <summary>
     /// Maps <see cref="IHasChangedWhen.ChangedWhen"/> to the current UTC time.
     /// </summary>
     public static IMappingExpression<TSource, TDestination> MapChangedWhen<TSource, TDestination>(this IMappingExpression<TSource, TDestination> expression)
         where TDestination : IHasChangedWhen
-        => expression.ForMember(dest => dest.ChangedWhen, opt => opt.MapFrom(_ => DateTime.UtcNow));
+        => expression.ForMember(dest => dest.ChangedWhen, opt => opt.MapFrom(_ => DateTime.Now));
 }

EnvelopeGenerator.Application/Common/Notifications/SendMailHandler.cs

@@ -113,7 +113,7 @@ public abstract class SendMailHandler<TNotification> : INotificationHandler<TNot
             EmailAddress = notification.EmailAddress,
             EmailBody = temp.Body,
             EmailSubj = temp.Subject,
-            AddedWhen = DateTime.UtcNow,
+            AddedWhen = DateTime.Now,
             AddedWho = DispatcherParams.AddedWho,
             SendingProfile = DispatcherParams.SendingProfile,
             ReminderTypeId = DispatcherParams.ReminderTypeId,

EnvelopeGenerator.Application/Common/Query/EnvelopeQueryBase.cs

@@ -14,10 +14,4 @@ public record EnvelopeQueryBase
     /// Die universell eindeutige Kennung des Umschlags.
     /// </summary>
     public virtual string? Uuid { get; set; }
-
-    /// <summary>
-    /// Wenn gesetzt, wird das DocResult-Feld in der Abfrage einbezogen.
-    /// Standardmäßig wird DocResult nicht geladen, um große Binärdaten zu vermeiden.
-    /// </summary>
-    public bool IncludeDocResult { get; set; } = false;
 }

EnvelopeGenerator.Application/Configuration/Queries/ReadDefaultConfigQuery.cs

@@ -1,69 +0,0 @@
-using AutoMapper;
-using DigitalData.Core.Abstraction.Application.Repository;
-using DigitalData.Core.Exceptions;
-using EnvelopeGenerator.Application.Common;
-using EnvelopeGenerator.Application.Common.Dto;
-using EnvelopeGenerator.Domain.Entities;
-using MediatR;
-using Microsoft.EntityFrameworkCore;
-using Microsoft.Extensions.Caching.Distributed;
-using Microsoft.Extensions.Caching.Memory;
-
-namespace EnvelopeGenerator.Application.Configuration.Queries;
-
-/// <summary>
-/// 
-/// </summary>
-public record ReadDefaultConfigQuery : IRequest<ConfigDto>
-{
-    /// <summary>
-    /// 
-    /// </summary>
-    public bool EnforceSingleResult { get; init; }
-}
-
-/// <summary>
-/// 
-/// </summary>
-public class ReadDefaultConfigQueryHandler : IRequestHandler<ReadDefaultConfigQuery, ConfigDto>
-{
-    private readonly IRepository<Config> _repo;
-
-    private readonly IMapper _mapper;
-
-    private readonly IMemoryCache _cache;
-
-    /// <summary>
-    /// 
-    /// </summary>
-    /// <param name="repo"></param>
-    /// <param name="mapper"></param>
-    /// <param name="cache"></param>
-    public ReadDefaultConfigQueryHandler(IRepository<Config> repo, IMapper mapper, IMemoryCache cache)
-    {
-        _repo = repo;
-        _mapper = mapper;
-        _cache = cache;
-    }
-
-    /// <summary>
-    /// 
-    /// </summary>
-    /// <param name="request"></param>
-    /// <param name="cancel"></param>
-    /// <returns></returns>
-    /// <exception cref="InvalidOperationException"></exception>
-    public async Task<ConfigDto> Handle(ReadDefaultConfigQuery request, CancellationToken cancel)
-    {
-        var config = await _cache.GetOrCreateAsync(CacheKey.DefaultConfig, entry =>
-        {
-            entry.AbsoluteExpirationRelativeToNow = TimeSpan.FromMinutes(30);
-            return request.EnforceSingleResult
-            ? _repo.Query.SingleOrDefaultAsync(cancel)
-            : _repo.Query.FirstOrDefaultAsync(cancel)
-            ?? throw new NotFoundException("Default configuration could not be found. Ensure at least one configuration record exists in the database.");
-        });
-
-        return _mapper.Map<ConfigDto>(config);
-    }
-}

EnvelopeGenerator.Application/DocStatus/MappingProfile.cs

@@ -27,7 +27,7 @@ public class MappingProfile : Profile
         CreateMap<UpdateDocStatusCommand, DocumentStatus>()
         .ForMember(dest => dest.Envelope, opt => opt.Ignore())
         .ForMember(dest => dest.Receiver, opt => opt.Ignore())
-        .ForMember(dest => dest.StatusChangedWhen, opt => opt.MapFrom(src => DateTime.UtcNow))
+        .ForMember(dest => dest.StatusChangedWhen, opt => opt.MapFrom(src => DateTime.Now))
         .MapChangedWhen();
     }
 }

EnvelopeGenerator.Application/Documents/Queries/ReadDocumentQuery.cs

@@ -53,14 +53,17 @@ public class ReadDocumentQueryHandler : IRequestHandler<ReadDocumentQuery, Docum
     /// </exception>
     public async Task<DocumentDto> Handle(ReadDocumentQuery query, CancellationToken cancel)
     {
+        var docQuery = _repo.Query.Include(doc => doc.Elements).ThenInclude(e => e.Annotations);
+
         if (query.Id is not null)
         {
-            var doc = await _repo.Query.Where(d => d.Id == query.Id).FirstOrDefaultAsync(cancel);
+            var doc = await docQuery.Where(d => d.Id == query.Id).FirstOrDefaultAsync(cancel);
+            
             return _mapper.Map<DocumentDto>(doc);
         }            
         else if (query.EnvelopeId is not null)
         {
-            var doc = await _repo.Query.Where(d => d.EnvelopeId == query.EnvelopeId).FirstOrDefaultAsync(cancel);
+            var doc = await docQuery.Where(d => d.EnvelopeId == query.EnvelopeId).FirstOrDefaultAsync(cancel);
             return _mapper.Map<DocumentDto>(doc);
         }
 

EnvelopeGenerator.Application/EnvelopeGenerator.Application.csproj

@@ -41,7 +41,7 @@
 	</ItemGroup>
 
 	<ItemGroup Condition="'$(TargetFramework)' == 'net9.0'">
-		<PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="9.0.6" />
+		<PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="9.0.5" />
 	</ItemGroup>
 
 	<ItemGroup>
@@ -81,7 +81,6 @@
 	<ItemGroup Condition="'$(TargetFramework)' == 'net7.0'">
 	  <PackageReference Include="AutoMapper" Version="13.0.1" />
 	  <PackageReference Include="Microsoft.Data.SqlClient" Version="5.2.2" />
-	<PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="7.0.20" />
 	  <PackageReference Include="CommandDotNet">
 		<Version>7.0.5</Version>
 	  </PackageReference>
@@ -89,7 +88,6 @@
 
 	<ItemGroup Condition="'$(TargetFramework)' == 'net8.0'">
 	  <PackageReference Include="AutoMapper" Version="14.0.0" />
-	<PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="8.0.17" />
 	  <PackageReference Include="CommandDotNet">
 	    <Version>8.1.1</Version>
 	  </PackageReference>
@@ -97,7 +95,6 @@
 
 	<ItemGroup Condition="'$(TargetFramework)' == 'net9.0'">
 	  <PackageReference Include="AutoMapper" Version="14.0.0" />
-	<PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="9.0.6" />
 	  <PackageReference Include="CommandDotNet">
 	    <Version>8.1.1</Version>
 	  </PackageReference>

EnvelopeGenerator.Application/EnvelopeReceivers/Queries/ReadEnvelopeReceiverSecretQuery.cs

@@ -0,0 +1,127 @@
+using AutoMapper;
+using DigitalData.Core.Abstraction.Application.Repository;
+using EnvelopeGenerator.Application.Envelopes.Queries;
+using EnvelopeGenerator.Application.Receivers.Queries;
+using MediatR;
+using EnvelopeGenerator.Domain.Entities;
+using Microsoft.EntityFrameworkCore;
+using EnvelopeGenerator.Application.Common.Dto.EnvelopeReceiver;
+using EnvelopeGenerator.Application.Common.Query;
+using EnvelopeGenerator.Application.Common.Extensions;
+
+namespace EnvelopeGenerator.Application.EnvelopeReceivers.Queries;
+
+/// <summary>
+/// Represents a query for reading an envelope receiver including sensitive fields
+/// (access code, phone number) that are excluded from the standard <see cref="ReadEnvelopeReceiverQuery"/>.
+/// </summary>
+/// <remarks>
+/// Returns a single <see cref="EnvelopeReceiverSecretDto"/> matched by UUID and receiver signature.
+/// Equivalent to the legacy <c>ReadWithSecretByUuidSignatureAsync</c> service method.
+/// </remarks>
+public record ReadEnvelopeReceiverSecretQuery
+    : EnvelopeReceiverQueryBase<ReadEnvelopeQuery, ReadReceiverQuery>,
+      IRequest<EnvelopeReceiverSecretDto?>;
+
+/// <summary>
+/// Extension methods for dispatching <see cref="ReadEnvelopeReceiverSecretQuery"/> via <see cref="IMediator"/>.
+/// </summary>
+public static class ReadEnvelopeReceiverSecretQueryExtensions
+{
+    /// <summary>
+    /// Sends a <see cref="ReadEnvelopeReceiverSecretQuery"/> using the composite key (uuid::signature).
+    /// </summary>
+    /// <param name="mediator">The mediator instance.</param>
+    /// <param name="key">Composite key in the format <c>uuid::signature</c>.</param>
+    /// <param name="cancel">Cancellation token.</param>
+    /// <returns>The matching <see cref="EnvelopeReceiverSecretDto"/>, or <c>null</c> if not found.</returns>
+    public static Task<EnvelopeReceiverSecretDto?> ReadEnvelopeReceiverSecretAsync(
+        this IMediator mediator,
+        string key,
+        CancellationToken cancel = default)
+        => mediator.Send(new ReadEnvelopeReceiverSecretQuery { Key = key }, cancel);
+
+    /// <summary>
+    /// Sends a <see cref="ReadEnvelopeReceiverSecretQuery"/> using UUID and receiver signature.
+    /// </summary>
+    /// <param name="mediator">The mediator instance.</param>
+    /// <param name="uuid">Envelope UUID.</param>
+    /// <param name="signature">Receiver signature.</param>
+    /// <param name="cancel">Cancellation token.</param>
+    /// <returns>The matching <see cref="EnvelopeReceiverSecretDto"/>, or <c>null</c> if not found.</returns>
+    public static Task<EnvelopeReceiverSecretDto?> ReadEnvelopeReceiverSecretAsync(
+        this IMediator mediator,
+        string uuid,
+        string signature,
+        CancellationToken cancel = default)
+    {
+        var q = new ReadEnvelopeReceiverSecretQuery();
+        q.Envelope.Uuid = uuid;
+        q.Receiver.Signature = signature;
+        return mediator.Send(q, cancel);
+    }
+
+    /// <summary>
+    /// Handles <see cref="ReadEnvelopeReceiverSecretQuery"/> and returns a
+    /// <see cref="EnvelopeReceiverSecretDto"/> containing sensitive fields.
+    /// </summary>
+    public class ReadEnvelopeReceiverSecretQueryHandler
+        : IRequestHandler<ReadEnvelopeReceiverSecretQuery, EnvelopeReceiverSecretDto?>
+    {
+        private readonly IRepository<EnvelopeReceiver> _repo;
+        private readonly IRepository<Receiver> _rcvRepo;
+        private readonly IMapper _mapper;
+
+        /// <summary>
+        /// Initializes a new instance of <see cref="ReadEnvelopeReceiverSecretQueryHandler"/>.
+        /// </summary>
+        /// <param name="envelopeReceiver">Repository for <see cref="EnvelopeReceiver"/>.</param>
+        /// <param name="rcvRepo">Repository for <see cref="Receiver"/>.</param>
+        /// <param name="mapper">AutoMapper instance.</param>
+        public ReadEnvelopeReceiverSecretQueryHandler(
+            IRepository<EnvelopeReceiver> envelopeReceiver,
+            IRepository<Receiver> rcvRepo,
+            IMapper mapper)
+        {
+            _repo = envelopeReceiver;
+            _rcvRepo = rcvRepo;
+            _mapper = mapper;
+        }
+
+        /// <summary>
+        /// Handles the query and returns the matching <see cref="EnvelopeReceiverSecretDto"/>.
+        /// </summary>
+        /// <param name="request">The query containing filter criteria.</param>
+        /// <param name="cancel">Cancellation token.</param>
+        /// <returns>
+        /// The matched <see cref="EnvelopeReceiverSecretDto"/>, or <c>null</c> if no record is found.
+        /// </returns>
+        public async Task<EnvelopeReceiverSecretDto?> Handle(
+            ReadEnvelopeReceiverSecretQuery request,
+            CancellationToken cancel)
+        {
+            var q = _repo.Query.Where(request, notnull: false);
+
+            var envRcvs = await q
+                .Include(er => er.Envelope).ThenInclude(e => e!.Documents!).ThenInclude(d => d.Elements)
+                .Include(er => er.Envelope).ThenInclude(e => e!.Histories)
+                .Include(er => er.Envelope).ThenInclude(e => e!.User)
+                .Include(er => er.Receiver)
+                .ToListAsync(cancel);
+
+            if (request.Receiver.HasAnyCriteria && envRcvs.Count != 0)
+            {
+                var receiver = await _rcvRepo.Query.Where(request.Receiver).FirstAsync(cancel);
+
+                foreach (var item in envRcvs)
+                    item.Envelope?.Documents?.FirstOrDefault()?.Elements?.RemoveAll(s => s.ReceiverId != receiver.Id);
+            }
+
+            var envRcv = envRcvs.FirstOrDefault();
+            if (envRcv is null)
+                return null;
+
+            return _mapper.Map<EnvelopeReceiverSecretDto>(envRcv);
+        }
+    }
+}

EnvelopeGenerator.Application/Envelopes/Commands/CreateEnvelopeCommand.cs

@@ -40,10 +40,10 @@ public record CreateEnvelopeCommand : IRequest<EnvelopeDto?>
     /// </summary>
     /// <param name="userId"></param>
     /// <returns></returns>
-    public bool Authorize(int userId)
+    public CreateEnvelopeCommand WithAuth(int userId)
     {
         UserId = userId;
-        return true;
+        return this;
     }
 
     /// <summary>

EnvelopeGenerator.Application/Envelopes/Queries/ReadEnvelopeQuery.cs

@@ -24,12 +24,6 @@ public record ReadEnvelopeQuery : EnvelopeQueryBase, IRequest<IEnumerable<Envelo
     /// </summary>
     public int? UserId { get; init; }
 
-    /// <summary>
-    /// Optionaler Zeitfilter in Minuten; wenn gesetzt, werden nur Umschläge zurückgegeben,
-    /// deren letzte Änderung mindestens diese Anzahl an Minuten zurückliegt.
-    /// </summary>
-    public int? MinMinutesSinceLastChange { get; init; }
-
     /// <summary>
     /// Setzt den Benutzerkontext für die Abfrage.
     /// </summary>
@@ -138,12 +132,6 @@ public class ReadEnvelopeQueryHandler : IRequestHandler<ReadEnvelopeQuery, IEnum
                 query = query.Where(e => !status.Ignore.Contains(e.Status));
         }
 
-        if (request.MinMinutesSinceLastChange is int minMinutesSinceLastChange)
-        {
-            query = query.Where(e => e.ChangedWhen.HasValue
-                && EF.Functions.DateDiffMinute(e.ChangedWhen.Value, DateTime.Now) >= minMinutesSinceLastChange);
-        }
-
         var envelopes = await query
             .Include(e => e.Documents)
             .ToListAsync(cancel);

EnvelopeGenerator.Application/Envelopes/Queries/ReadSingleEnvelopeDocResultQuery.cs

@@ -1,48 +0,0 @@
-using MediatR;
-using EnvelopeGenerator.Application.Common.Dto;
-using DigitalData.Core.Exceptions;
-
-namespace EnvelopeGenerator.Application.Envelopes.Queries;
-
-/// <summary>
-/// Repräsentiert eine Abfrage für Umschläge.
-/// </summary>
-public record ReadSingleEnvelopeDocResultQuery() : IRequest<byte[]>
-{
-    /// <summary>
-    /// 
-    /// </summary>
-    public ReadSingleEnvelopeQuery Envelope { get; set; } = null!;
-}
-
-/// <summary>
-/// Verarbeitet <see cref="ReadEnvelopeQuery"/> und liefert passende <see cref="EnvelopeDto"/>-Ergebnisse.
-/// </summary>
-public class ReadSingleEnvelopeDocResultQueryHandler : IRequestHandler<ReadSingleEnvelopeDocResultQuery, byte[]>
-{
-    private readonly IMediator _mediator;
-
-    /// <summary>
-    /// 
-    /// </summary>
-    /// <param name="mediator"></param>
-    public ReadSingleEnvelopeDocResultQueryHandler(IMediator mediator)
-    {
-        _mediator = mediator;
-    }
-
-    /// <summary>
-    /// 
-    /// </summary>
-    /// <param name="request"></param>
-    /// <param name="cancellationToken"></param>
-    /// <returns></returns>
-    public async Task<byte[]> Handle(ReadSingleEnvelopeDocResultQuery request, CancellationToken cancellationToken)
-    {
-        request.Envelope.IncludeDocResult = true;
-        var result = await _mediator.Send(request.Envelope, cancellationToken);
-        return result.DocResult is byte[] docResult && docResult.Length > 0 
-            ? docResult 
-            : throw new NotFoundException($"Document for Envelope with ID {request.Envelope.Id} not found");
-    }
-}

EnvelopeGenerator.Application/Envelopes/Queries/ReadSingleEnvelopeQuery.cs

@@ -1,78 +0,0 @@
-using MediatR;
-using EnvelopeGenerator.Application.Common.Query;
-using EnvelopeGenerator.Application.Common.Dto;
-using AutoMapper;
-using DigitalData.Core.Abstraction.Application.Repository;
-using EnvelopeGenerator.Domain.Entities;
-using Microsoft.EntityFrameworkCore;
-using DigitalData.Core.Exceptions;
-
-namespace EnvelopeGenerator.Application.Envelopes.Queries;
-
-/// <summary>
-/// Repräsentiert eine Abfrage für einen einzelnen Umschlag.
-/// </summary>
-public record ReadSingleEnvelopeQuery : EnvelopeQueryBase, IRequest<EnvelopeDto>
-{
-    /// <summary>
-    /// Optionaler Benutzerfilter; wenn gesetzt, werden nur Umschläge des Benutzers geladen.
-    /// </summary>
-    public int? UserId { get; init; }
-
-    /// <summary>
-    /// Setzt den Benutzerkontext für die Abfrage.
-    /// </summary>
-    public ReadSingleEnvelopeQuery Authorize(int userId) => this with { UserId = userId };
-}
-
-/// <summary>
-/// Verarbeitet <see cref="ReadSingleEnvelopeQuery"/> und liefert ein einzelnes <see cref="EnvelopeDto"/>-Ergebnis.
-/// </summary>
-public class ReadSingleEnvelopeQueryHandler : IRequestHandler<ReadSingleEnvelopeQuery, EnvelopeDto>
-{
-    private readonly IRepository<Envelope> _repository;
-    private readonly IMapper _mapper;
-
-    /// <summary>
-    /// 
-    /// </summary>
-    /// <param name="repository"></param>
-    /// <param name="mapper"></param>
-    public ReadSingleEnvelopeQueryHandler(IRepository<Envelope> repository, IMapper mapper)
-    {
-        _repository = repository;
-        _mapper = mapper;
-    }
-
-    /// <summary>
-    /// 
-    /// </summary>
-    /// <param name="request"></param>
-    /// <param name="cancel"></param>
-    /// <returns></returns>
-    public async Task<EnvelopeDto> Handle(ReadSingleEnvelopeQuery request, CancellationToken cancel)
-    {
-        var query = _repository.Query;
-
-        if (request.UserId is int userId)
-            query = query.Where(e => e.UserId == userId);
-
-        if (request.Id is int id)
-            query = query.Where(e => e.Id == id);
-
-        if (request.Uuid is string uuid)
-            query = query.Where(e => e.Uuid == uuid);
-        
-        var envelopes = await query
-            .Include(e => e.Documents)
-            .Take(2)
-            .ToListAsync(cancel);
-
-        if (envelopes.Count > 1)
-            throw new BadRequestException($"Multiple envelopes found for the given criteria: Id={request.Id}, Uuid={request.Uuid}, UserId={request.UserId}");
-
-        return envelopes.SingleOrDefault() is Envelope envelope
-            ? _mapper.Map<EnvelopeDto>(envelope)
-            : throw new NotFoundException($"Envelope with Id={request.Id}, Uuid={request.Uuid} not found");
-    }
-}

EnvelopeGenerator.Application/Histories/Commands/CreateHistoryCommand.cs

@@ -34,7 +34,7 @@ public record CreateHistoryCommand : EnvelopeReceiverQueryBase, IRequest<History
     /// <summary>
     /// 
     /// </summary>
-    public DateTime AddedWhen { get; } = DateTime.UtcNow;
+    public DateTime AddedWhen { get; } = DateTime.Now;
 
     /// <summary>
     /// 

EnvelopeGenerator.Application/Resources/Resource.en-US.resx

@@ -448,7 +448,7 @@
     <value>Document has been reset.</value>
   </data>
   <data name="DocumentSuccessfullyConfirmed" xml:space="preserve">
-    <value>Document successfully red and confirmed!</value>
+    <value>Document successfully read and confirmed!</value>
   </data>
   <data name="DocumentConfirmedConfirmationMessage" xml:space="preserve">
     <value>You have read and confirmed the document. You will receive a written confirmation afterwards.</value>

EnvelopeGenerator.Application/Services/ConfigService.cs

@@ -7,7 +7,6 @@ using Microsoft.Extensions.Logging;
 using EnvelopeGenerator.Application.Common.Dto;
 using EnvelopeGenerator.Application.Common.Interfaces.Repositories;
 using EnvelopeGenerator.Application.Common.Interfaces.Services;
-using EnvelopeGenerator.Application.Common;
 
 namespace EnvelopeGenerator.Application.Services;
 
@@ -17,6 +16,8 @@ namespace EnvelopeGenerator.Application.Services;
 [Obsolete("Use MediatR")]
 public class ConfigService : ReadService<IConfigRepository, ConfigDto, Config, int>, IConfigService
 {
+	private static readonly Guid DefaultConfigCacheId = Guid.NewGuid();
+
 	private readonly IMemoryCache _cache;
 
     private readonly ILogger<ConfigService> _logger;
@@ -61,7 +62,7 @@ public class ConfigService : ReadService<IConfigRepository, ConfigDto, Config, i
 	/// </exception>
 	public async Task<ConfigDto> ReadDefaultAsync()
     {
-        var config = await _cache.GetOrCreateAsync(CacheKey.DefaultConfig, _ => ReadFirstAsync().ThenAsync(
+        var config = await _cache.GetOrCreateAsync(DefaultConfigCacheId, _ => ReadFirstAsync().ThenAsync(
             Success: config => config,
             Fail: (mssg, ntc) =>
             {

EnvelopeGenerator.Application/ThirdPartyModules/Queries/ReadThirdPartyModuleLicenseQuery.cs

@@ -1,92 +0,0 @@
-using DigitalData.Core.Abstraction.Application.Repository;
-using DigitalData.Core.Exceptions;
-using EnvelopeGenerator.Domain.Entities;
-using MediatR;
-using Microsoft.EntityFrameworkCore;
-
-namespace EnvelopeGenerator.Application.ThirdPartyModules.Queries;
-
-/// <summary>
-/// Query to read the license text of a third-party module.
-/// Either <see cref="Id"/> or <see cref="Name"/> must be provided, but not both.
-/// </summary>
-public record ReadThirdPartyModuleLicenseQuery : IRequest<string>
-{
-    /// <summary>
-    /// The unique identifier of the third-party module (optional).
-    /// </summary>
-    public int? Id { get; init; }
-
-    /// <summary>
-    /// The name of the third-party module (optional).
-    /// </summary>
-    public string? Name { get; init; }
-
-    /// <summary>
-    /// Whether to filter only active modules. Defaults to <c>true</c>.
-    /// </summary>
-    public bool Active { get; init; } = true;
-}
-
-/// <summary>
-/// Handles <see cref="ReadThirdPartyModuleLicenseQuery"/> and returns the license text of a third-party module.
-/// </summary>
-public class ReadThirdPartyModuleLicenseQueryHandler : IRequestHandler<ReadThirdPartyModuleLicenseQuery, string>
-{
-    private readonly IRepository<ThirdPartyModule> _repository;
-
-    /// <summary>
-    /// Initializes a new instance of the <see cref="ReadThirdPartyModuleLicenseQueryHandler"/> class.
-    /// </summary>
-    /// <param name="repository">The repository for accessing third-party modules.</param>
-    public ReadThirdPartyModuleLicenseQueryHandler(IRepository<ThirdPartyModule> repository)
-    {
-        _repository = repository;
-    }
-
-    /// <summary>
-    /// Handles the query by filtering on Id or Name and returning the license text.
-    /// </summary>
-    /// <param name="request">The query parameters.</param>
-    /// <param name="cancel">A cancellation token.</param>
-    /// <returns>The license text of the matching third-party module.</returns>
-    /// <exception cref="BadRequestException">
-    /// Thrown when neither Id nor Name is provided, or when both are provided.
-    /// </exception>
-    /// <exception cref="InvalidOperationException">
-    /// Thrown when multiple modules match the given criteria, indicating a data integrity issue.
-    /// </exception>
-    /// <exception cref="NotFoundException">
-    /// Thrown when no module matches the given criteria.
-    /// </exception>
-    public async Task<string> Handle(ReadThirdPartyModuleLicenseQuery request, CancellationToken cancel)
-    {
-        if (request.Id is null && request.Name is null)
-            throw new BadRequestException("Either Id or Name must be provided.");
-
-        if (request.Id is not null && request.Name is not null)
-            throw new BadRequestException("Only one of Id or Name must be provided, not both.");
-
-        var query = _repository.Query
-            .Where(m => m.Active == request.Active);
-
-        if (request.Id is int id)
-            query = query.Where(m => m.Id == id);
-
-        if (request.Name is string name)
-            query = query.Where(m => m.Name == name);
-
-        var modules = await query
-            .Take(2)
-            .ToListAsync(cancel);
-
-        if (modules.Count > 1)
-            throw new InvalidOperationException(
-                $"Data integrity violation: multiple third-party modules found for the given criteria (Id={request.Id}, Name={request.Name}, Active={request.Active}).");
-
-        return modules.SingleOrDefault() is ThirdPartyModule module
-            ? module.License
-            : throw new NotFoundException(
-                $"Third-party module not found for the given criteria (Id={request.Id}, Name={request.Name}, Active={request.Active}).");
-    }
-}

EnvelopeGenerator.BBTests/EnvelopeGenerator.BBTests.vbproj

@@ -487,10 +487,6 @@
       <Project>{6EA0C51F-C2B1-4462-8198-3DE0B32B74F8}</Project>
       <Name>EnvelopeGenerator.CommonServices</Name>
     </ProjectReference>
-    <ProjectReference Include="..\EnvelopeGenerator.CommonServices\EnvelopeGenerator.CommonServices.vbproj">
-      <Project>{6ea0c51f-c2b1-4462-8198-3de0b32b74f8}</Project>
-      <Name>EnvelopeGenerator.CommonServices</Name>
-    </ProjectReference>
     <ProjectReference Include="..\EnvelopeGenerator.Domain\EnvelopeGenerator.Domain.csproj">
       <Project>{4f32a98d-e6f0-4a09-bd97-1cf26107e837}</Project>
       <Name>EnvelopeGenerator.Domain</Name>

EnvelopeGenerator.BBTests/frmFinalizePDF.Designer.vb

@@ -27,6 +27,7 @@ Partial Class frmFinalizePDF
         Me.Label2 = New System.Windows.Forms.Label()
         Me.Button1 = New System.Windows.Forms.Button()
         Me.Button2 = New System.Windows.Forms.Button()
+        Me.Button3 = New System.Windows.Forms.Button()
         Me.txtResult = New System.Windows.Forms.TextBox()
         Me.txtEnvelope = New System.Windows.Forms.TextBox()
         Me.SuspendLayout()
@@ -75,6 +76,15 @@ Partial Class frmFinalizePDF
         Me.Button2.Text = "Merge Json"
         Me.Button2.UseVisualStyleBackColor = True
         '
+        'Button3
+        '
+        Me.Button3.Location = New System.Drawing.Point(15, 160)
+        Me.Button3.Name = "Button3"
+        Me.Button3.Size = New System.Drawing.Size(166, 23)
+        Me.Button3.TabIndex = 5
+        Me.Button3.Text = "Full Finalize Test"
+        Me.Button3.UseVisualStyleBackColor = True
+        '
         'txtResult
         '
         Me.txtResult.Location = New System.Drawing.Point(333, 12)
@@ -97,6 +107,7 @@ Partial Class frmFinalizePDF
         Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
         Me.ClientSize = New System.Drawing.Size(800, 450)
         Me.Controls.Add(Me.txtResult)
+        Me.Controls.Add(Me.Button3)
         Me.Controls.Add(Me.Button2)
         Me.Controls.Add(Me.Button1)
         Me.Controls.Add(Me.Label2)
@@ -116,5 +127,6 @@ Partial Class frmFinalizePDF
     Friend WithEvents Label2 As Label
     Friend WithEvents Button1 As Button
     Friend WithEvents Button2 As Button
+    Friend WithEvents Button3 As Button
     Friend WithEvents txtResult As TextBox
 End Class

EnvelopeGenerator.BBTests/frmFinalizePDF.vb

@@ -8,6 +8,8 @@ Imports Newtonsoft.Json.Linq
 Imports EnvelopeGenerator.Infrastructure
 Imports Microsoft.EntityFrameworkCore
 Imports DigitalData.Core.Abstractions
+Imports DigitalData.Core.Abstraction.Application.Repository
+Imports EnvelopeGenerator.Domain.Entities
 
 Public Class frmFinalizePDF
     Private Const CONNECTIONSTRING = "Server=sDD-VMP04-SQL17\DD_DEVELOP01;Database=DD_ECM;User Id=sa;Password=+bk8oAbbQP1AzoHtvZUbd+Mbok2f8Fl4miEx1qssJ5yEaEWoQJ9prg4L14fURpPnqi1WMNs9fE4=;" + "Encrypt=True;TrustServerCertificate=True;"
@@ -124,4 +126,86 @@ Public Class frmFinalizePDF
 
         txtResult.Text = oJObject1.ToString()
     End Sub
+
+    Private Sub Button3_Click(sender As Object, e As EventArgs) Handles Button3.Click
+        Try
+            Dim envelopeId As Integer = CInt(txtEnvelope.Text)
+            Dim log As New System.Text.StringBuilder()
+
+            ' 1. Load annotation JSON data (same as Service)
+            Dim oTable = LoadAnnotationDataForEnvelope()
+            Dim oJsonList = oTable.Rows.
+                Cast(Of DataRow).
+                Select(Function(r As DataRow) r.Item("VALUE").ToString()).
+                ToList()
+            log.AppendLine($"Annotation JSON count: {oJsonList.Count}")
+
+            ' 2. Load document bytes (same as Service)
+            Dim oBuffer As Byte() = ReadEnvelope(envelopeId)
+            log.AppendLine($"Document bytes: {oBuffer.Length}")
+
+            ' 3. Check what BurnAnnotsToPDF will do internally
+            Using scope = Factory.Shared.ScopeFactory.CreateScope()
+                Dim envRepo = scope.ServiceProvider.Repository(Of Envelope)()
+                Dim envelope = envRepo.Where(Function(env) env.Id = envelopeId).FirstOrDefault()
+
+                If envelope Is Nothing Then
+                    log.AppendLine("ERROR: Envelope not found in EF Core!")
+                    txtResult.Text = log.ToString()
+                    Return
+                End If
+
+                log.AppendLine($"Envelope found: Id={envelope.Id}, EnvelopeTypeId={envelope.EnvelopeTypeId}")
+                log.AppendLine($"ReadOnly (IsReadAndConfirm): {envelope.ReadOnly}")
+
+                If envelope.ReadOnly Then
+                    log.AppendLine(">>> EARLY RETURN: ReadOnly=True, original PDF returned without burning")
+                    txtResult.Text = log.ToString()
+                    Return
+                End If
+
+                Dim sigRepo = scope.ServiceProvider.Repository(Of Signature)()
+                Dim elements = sigRepo _
+                    .Where(Function(sig) sig.Document.EnvelopeId = envelopeId) _
+                    .Include(Function(sig) sig.Annotations) _
+                    .ToList()
+
+                log.AppendLine($"Elements (Signature) count: {elements.Count}")
+
+                If elements.Any() Then
+                    log.AppendLine(">>> PATH: BurnElementAnnotsToPDF (new element-based path)")
+                    For Each elem In elements
+                        Dim annotCount = If(elem.Annotations IsNot Nothing, elem.Annotations.Count(), 0)
+                        log.AppendLine($"  Element Id={elem.Id}, Page={elem.Page}, X={elem.X}, Y={elem.Y}, W={elem.Width}, H={elem.Height}, Annotations={annotCount}")
+                        If elem.Annotations IsNot Nothing Then
+                            For Each annot In elem.Annotations
+                                log.AppendLine($"    Annot: Name={annot.Name}, Type={annot.Type}, X={annot.X}, Y={annot.Y}, W={annot.Width}, H={annot.Height}")
+                            Next
+                        End If
+                    Next
+                Else
+                    log.AppendLine(">>> PATH: BurnInstantJSONAnnotsToPDF (old JSON-based path)")
+                End If
+            End Using
+
+            ' 4. Actually call BurnAnnotsToPDF (same as Service)
+            log.AppendLine("")
+            log.AppendLine("Calling BurnAnnotsToPDF...")
+            Dim oNewBuffer = PDFBurner.BurnAnnotsToPDF(oBuffer, oJsonList, envelopeId)
+            log.AppendLine($"Result bytes: {oNewBuffer.Length}")
+            log.AppendLine($"Same as input: {oBuffer.Length = oNewBuffer.Length AndAlso oBuffer.SequenceEqual(oNewBuffer)}")
+
+            ' 5. Write output
+            Dim desktopPath As String = Environment.GetFolderPath(Environment.SpecialFolder.Desktop)
+            Dim oNewPath = Path.Combine(desktopPath, $"E{txtEnvelope.Text}_FullTest.burned.pdf")
+            File.WriteAllBytes(oNewPath, oNewBuffer)
+            log.AppendLine($"Output: {oNewPath}")
+
+            txtResult.Text = log.ToString()
+            Process.Start(oNewPath)
+
+        Catch ex As Exception
+            txtResult.Text = $"ERROR: {ex.Message}{vbCrLf}{vbCrLf}{ex.ToString()}"
+        End Try
+    End Sub
 End Class

EnvelopeGenerator.BBTests/packages.config

@@ -15,13 +15,13 @@
   <package id="DigitalData.Modules.Messaging" version="1.9.8" targetFramework="net462" />
   <package id="DocumentFormat.OpenXml" version="3.2.0" targetFramework="net462" />
   <package id="DocumentFormat.OpenXml.Framework" version="3.2.0" targetFramework="net462" />
-  <package id="EntityFramework" version="6.5.1" targetFramework="net462" />
+  <package id="EntityFramework" version="6.4.4" targetFramework="net462" />
   <package id="EntityFramework.Firebird" version="6.4.0" targetFramework="net462" />
   <package id="FirebirdSql.Data.FirebirdClient" version="7.5.0" targetFramework="net462" />
   <package id="GdPicture" version="14.3.3" targetFramework="net462" />
   <package id="GdPicture.runtimes.windows" version="14.3.3" targetFramework="net462" />
   <package id="Microsoft.AspNet.WebApi.Client" version="6.0.0" targetFramework="net462" />
-  <package id="Microsoft.Bcl.AsyncInterfaces" version="9.0.0" targetFramework="net462" />
+  <package id="Microsoft.Bcl.AsyncInterfaces" version="8.0.0" targetFramework="net462" />
   <package id="Microsoft.Bcl.Cryptography" version="9.0.0" targetFramework="net462" />
   <package id="Microsoft.Bcl.HashCode" version="1.1.1" targetFramework="net462" />
   <package id="Microsoft.CSharp" version="4.7.0" targetFramework="net462" />
@@ -62,10 +62,10 @@
   <package id="protobuf-net.Core" version="3.2.46" targetFramework="net462" />
   <package id="RtfPipe" version="2.0.7677.4303" targetFramework="net462" />
   <package id="S22.Imap" version="3.6.0.0" targetFramework="net462" />
-  <package id="System.Buffers" version="4.6.1" targetFramework="net462" />
+  <package id="System.Buffers" version="4.6.0" targetFramework="net462" />
   <package id="System.ClientModel" version="1.8.0" targetFramework="net462" />
-  <package id="System.CodeDom" version="9.0.0" targetFramework="net462" />
-  <package id="System.Collections.Immutable" version="9.0.0" targetFramework="net462" />
+  <package id="System.CodeDom" version="8.0.0" targetFramework="net462" />
+  <package id="System.Collections.Immutable" version="8.0.0" targetFramework="net462" />
   <package id="System.ComponentModel.Annotations" version="4.7.0" targetFramework="net462" />
   <package id="System.Data.Common" version="4.3.0" targetFramework="net462" />
   <package id="System.Data.Odbc" version="6.0.1" targetFramework="net462" />
@@ -74,23 +74,23 @@
   <package id="System.Formats.Asn1" version="10.0.3" targetFramework="net462" />
   <package id="System.IdentityModel.Tokens.Jwt" version="7.7.1" targetFramework="net462" />
   <package id="System.IO.FileSystem.AccessControl" version="5.0.0" targetFramework="net462" />
-  <package id="System.IO.Packaging" version="9.0.0" targetFramework="net462" />
+  <package id="System.IO.Packaging" version="8.0.1" targetFramework="net462" />
   <package id="System.IO.Pipelines" version="9.0.0" targetFramework="net462" />
-  <package id="System.Management" version="9.0.0" targetFramework="net462" />
-  <package id="System.Memory" version="4.6.3" targetFramework="net462" />
+  <package id="System.Management" version="8.0.0" targetFramework="net462" />
+  <package id="System.Memory" version="4.6.0" targetFramework="net462" />
   <package id="System.Memory.Data" version="8.0.1" targetFramework="net462" />
-  <package id="System.Numerics.Vectors" version="4.6.1" targetFramework="net462" />
-  <package id="System.Runtime.CompilerServices.Unsafe" version="6.1.2" targetFramework="net462" />
+  <package id="System.Numerics.Vectors" version="4.6.0" targetFramework="net462" />
+  <package id="System.Runtime.CompilerServices.Unsafe" version="6.1.0" targetFramework="net462" />
   <package id="System.Security.AccessControl" version="6.0.1" targetFramework="net462" />
   <package id="System.Security.Cryptography.Algorithms" version="4.3.1" targetFramework="net462" />
   <package id="System.Security.Cryptography.Cng" version="5.0.0" targetFramework="net462" />
-  <package id="System.Security.Cryptography.Pkcs" version="9.0.0" targetFramework="net462" />
+  <package id="System.Security.Cryptography.Pkcs" version="8.0.1" targetFramework="net462" />
   <package id="System.Security.Cryptography.Primitives" version="4.3.0" targetFramework="net462" />
   <package id="System.Security.Cryptography.ProtectedData" version="4.5.0" targetFramework="net462" />
   <package id="System.Security.Principal.Windows" version="5.0.0" targetFramework="net462" />
-  <package id="System.Text.Encodings.Web" version="9.0.0" targetFramework="net462" />
-  <package id="System.Text.Json" version="9.0.0" targetFramework="net462" />
+  <package id="System.Text.Encodings.Web" version="8.0.0" targetFramework="net462" />
+  <package id="System.Text.Json" version="8.0.6" targetFramework="net462" />
   <package id="System.Text.RegularExpressions" version="4.3.1" targetFramework="net462" />
-  <package id="System.Threading.Tasks.Extensions" version="4.6.0" targetFramework="net462" />
-  <package id="System.ValueTuple" version="4.6.1" targetFramework="net462" />
+  <package id="System.Threading.Tasks.Extensions" version="4.5.4" targetFramework="net462" />
+  <package id="System.ValueTuple" version="4.5.0" targetFramework="net462" />
 </packages>

EnvelopeGenerator.CommonServices/Jobs/FinalizeDocument/FinalizeDocumentJob.vb

@@ -15,6 +15,7 @@ Imports DigitalData.Core.Abstraction.Application
 Imports EnvelopeGenerator.Infrastructure
 Imports Microsoft.EntityFrameworkCore
 Imports DigitalData.Core.Abstractions
+Imports EnvelopeGenerator.Domain.Interfaces
 
 Namespace Jobs
     Public Class FinalizeDocumentJob
@@ -230,6 +231,29 @@ Namespace Jobs
 
             Return Task.FromResult(True)
         End Function
+
+#Region "From BBTests"
+        Private Function ReadEnvelope(pEnvID As Integer) As Byte()
+            Dim strSql As String = "Select [BYTE_DATA] from [TBSIG_ENVELOPE_DOCUMENT] WHERE ENVELOPE_ID = " & pEnvID
+            Dim obyteDB = Database.GetScalarValue(strSql)
+            If Not IsDBNull(obyteDB) Then
+                Dim fileData As Byte() = DirectCast(Database.GetScalarValue(strSql), Byte())
+                If fileData IsNot Nothing Then
+                    Return fileData
+                End If
+            End If
+
+            Throw New InvalidOperationException($"Byte data is null. Envelope ID: {pEnvID}")
+
+        End Function
+
+        Private Function LoadAnnotationDataForEnvelope(pEnvID As Integer) As DataTable
+            Dim oSql = $"SELECT VALUE FROM [TBSIG_DOCUMENT_STATUS] WHERE ENVELOPE_ID = {pEnvID}"
+            Return Database.GetDatatable(oSql)
+
+        End Function
+#End Region
+
         Private Sub Update_File_DB(pFilePath As String, pEnvelopeID As Long)
             Dim SqlCom As SqlCommand
             Dim imageData As Byte()
@@ -327,7 +351,7 @@ Namespace Jobs
                 Logger.Warn($"No SendFinalEmailToCreator - oMailToCreator [{oMailToCreator}] <> [{FinalEmailType.No}] ")
             End If
 
-            If oMailToReceivers <> FinalEmailType.No Then
+            If oMailToReceivers <> FinalEmailType.No And pEnvelope.IsReadAndSign() Then
                 Logger.Debug("Sending emails to receivers..")
                 SendFinalEmailToReceivers(pEnvelope) ', pAttachment
             Else
@@ -418,7 +442,18 @@ Namespace Jobs
                 End Try
             End If
 
-            Return PDFBurner.BurnAnnotsToPDF(oInputDocumentBuffer, oAnnotations, pEnvelopeData.EnvelopeId)
+#Region "From BBTests"
+            Dim oTable = LoadAnnotationDataForEnvelope(pEnvelopeId)
+            Dim oJsonList = oTable.Rows.
+            Cast(Of DataRow).
+            Select(Function(r As DataRow) r.Item("VALUE").ToString()).
+            ToList()
+
+            Dim oBuffer As Byte() = ReadEnvelope(pEnvelopeId)
+
+#End Region
+
+            Return PDFBurner.BurnAnnotsToPDF(oBuffer, oJsonList, pEnvelopeId)
         End Function
 
         Private Function GetEnvelopeData(pEnvelopeId As Integer) As EnvelopeData

EnvelopeGenerator.CommonServices/Jobs/FinalizeDocument/PDFBurner.vb

@@ -85,16 +85,37 @@ Namespace Jobs.FinalizeDocument
 
                     'Add annotations
                     For Each element In elements
+                        If element Is Nothing Then
+                            Continue For
+                        End If
+
+                        Dim elementAnnotations = If(element.Annotations, Enumerable.Empty(Of ElementAnnotation)())
+                        If Not elementAnnotations.Any() Then
+                            Continue For
+                        End If
 
                         Dim frameX = (element.Left - 0.7 - margin)
 
-                        Dim frame = element.Annotations.FirstOrDefault(Function(a) a.Name = "frame")
+                        Dim frame = elementAnnotations.FirstOrDefault(Function(a) a.Name = "frame")
                         Dim frameY = element.Top - 0.5 - margin
-                        Dim frameYShift = frame.Y - frameY * inchFactor
-                        Dim frameXShift = frame.X - frameX * inchFactor
+                        Dim frameYShift As Double = 0
+                        Dim frameXShift As Double = 0
+
+                        If frame IsNot Nothing Then
+                            frameYShift = frame.Y - frameY * inchFactor
+                            frameXShift = frame.X - frameX * inchFactor
+                        End If
+
+                        For Each annot In elementAnnotations
+                            If annot Is Nothing Then
+                                Continue For
+                            End If
+
+                            Dim yOffsetofFF As Double = 0
+                            If Not String.IsNullOrEmpty(annot.Name) Then
+                                yOffsetsOfFF.TryGetValue(annot.Name, yOffsetofFF)
+                            End If
 
-                        For Each annot In element.Annotations
-                            Dim yOffsetofFF As Double = If(yOffsetsOfFF.TryGetValue(annot.Name, yOffsetofFF), yOffsetofFF, 0)
                             Dim y = frameY + yOffsetofFF
 
                             If annot.Type = AnnotationType.FormField Then

EnvelopeGenerator.CommonServices/Jobs/FinalizeDocument/PDFMerger.vb

@@ -56,7 +56,7 @@ Public Class PDFMerger
 
                             ' Convert to PDF/A
                             oMergedPDF.ConvertToPDFA(oFinalStream, PDFAConformanceLevel, ALLOW_VECTORIZATION, ALLOW_RASTERIZATION)
-                            oStatus = oDocumentPDF.GetStat()
+                            oStatus = oMergedPDF.GetStat()
                             If oStatus <> GdPictureStatus.OK Then
                                 Throw New MergeDocumentException($"Document could not be converted to PDF/A: {oStatus}")
                             End If

EnvelopeGenerator.CommonServices/Models/ReceiverModel.vb

@@ -270,12 +270,26 @@ Public Class ReceiverModel
     Private Function GetSignedDate(pEmailAddress As String, pEnvelopeId As Integer) As Date
         Try
             Dim oStatusInt As Integer = EnvelopeStatus.DocumentSigned
-            Return Database.GetScalarValue($"SELECT ACTION_DATE FROM [DD_ECM].[dbo].[TBSIG_ENVELOPE_HISTORY] WHERE ENVELOPE_ID = {pEnvelopeId}
+            Dim value = Database.GetScalarValue($"SELECT ACTION_DATE FROM [DD_ECM].[dbo].[TBSIG_ENVELOPE_HISTORY] WHERE ENVELOPE_ID = {pEnvelopeId}
                                                 And USER_REFERENCE = '{pEmailAddress}' AND [STATUS] = {oStatusInt}")
 
+            If value Is Nothing OrElse value Is DBNull.Value Then
+                Return DateTime.MinValue
+            End If
+
+            If TypeOf value Is DateTime Then
+                Return DirectCast(value, DateTime)
+            End If
+
+            Dim parsedDate As DateTime
+            If DateTime.TryParse(value.ToString(), parsedDate) Then
+                Return parsedDate
+            End If
+
+            Return DateTime.MinValue
         Catch ex As Exception
             Logger.Error(ex)
-            Return Nothing
+            Return DateTime.MinValue
         End Try
     End Function
 

EnvelopeGenerator.CommonServices/Strings/Model.Designer.vb

@@ -1,10 +1,10 @@
 '------------------------------------------------------------------------------
 ' <auto-generated>
-'     Dieser Code wurde von einem Tool generiert.
-'     Laufzeitversion:4.0.30319.42000
+'     This code was generated by a tool.
+'     Runtime Version:4.0.30319.42000
 '
-'     Änderungen an dieser Datei können falsches Verhalten verursachen und gehen verloren, wenn
-'     der Code erneut generiert wird.
+'     Changes to this file may cause incorrect behavior and will be lost if
+'     the code is regenerated.
 ' </auto-generated>
 '------------------------------------------------------------------------------
 
@@ -15,12 +15,12 @@ Imports System
 
 Namespace My.Resources
     
-    'Diese Klasse wurde von der StronglyTypedResourceBuilder automatisch generiert
-    '-Klasse über ein Tool wie ResGen oder Visual Studio automatisch generiert.
-    'Um einen Member hinzuzufügen oder zu entfernen, bearbeiten Sie die .ResX-Datei und führen dann ResGen
-    'mit der /str-Option erneut aus, oder Sie erstellen Ihr VS-Projekt neu.
+    'This class was auto-generated by the StronglyTypedResourceBuilder
+    'class via a tool like ResGen or Visual Studio.
+    'To add or remove a member, edit your .ResX file then rerun ResGen
+    'with the /str option, or rebuild your VS project.
     '''<summary>
-    '''  Eine stark typisierte Ressourcenklasse zum Suchen von lokalisierten Zeichenfolgen usw.
+    '''  A strongly-typed resource class, for looking up localized strings, etc.
     '''</summary>
     <Global.System.CodeDom.Compiler.GeneratedCodeAttribute("System.Resources.Tools.StronglyTypedResourceBuilder", "17.0.0.0"),  _
      Global.System.Diagnostics.DebuggerNonUserCodeAttribute(),  _
@@ -37,7 +37,7 @@ Namespace My.Resources
         End Sub
         
         '''<summary>
-        '''  Gibt die zwischengespeicherte ResourceManager-Instanz zurück, die von dieser Klasse verwendet wird.
+        '''  Returns the cached ResourceManager instance used by this class.
         '''</summary>
         <Global.System.ComponentModel.EditorBrowsableAttribute(Global.System.ComponentModel.EditorBrowsableState.Advanced)>  _
         Public Shared ReadOnly Property ResourceManager() As Global.System.Resources.ResourceManager
@@ -51,8 +51,8 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Überschreibt die CurrentUICulture-Eigenschaft des aktuellen Threads für alle
-        '''  Ressourcenzuordnungen, die diese stark typisierte Ressourcenklasse verwenden.
+        '''  Overrides the current thread's CurrentUICulture property for all
+        '''  resource lookups using this strongly typed resource class.
         '''</summary>
         <Global.System.ComponentModel.EditorBrowsableAttribute(Global.System.ComponentModel.EditorBrowsableState.Advanced)>  _
         Public Shared Property Culture() As Global.System.Globalization.CultureInfo
@@ -65,7 +65,7 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Zugriffscode korrekt eingegeben ähnelt.
+        '''  Looks up a localized string similar to Zugriffscode korrekt eingegeben.
         '''</summary>
         Public Shared ReadOnly Property AccessCodeCorrect() As String
             Get
@@ -74,7 +74,7 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Zugriffscode falsch eingegeben ähnelt.
+        '''  Looks up a localized string similar to Zugriffscode falsch eingegeben.
         '''</summary>
         Public Shared ReadOnly Property AccessCodeIncorrect() As String
             Get
@@ -83,7 +83,7 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Zugriffscode angefordert ähnelt.
+        '''  Looks up a localized string similar to Zugriffscode angefordert.
         '''</summary>
         Public Shared ReadOnly Property AccessCodeRequested() As String
             Get
@@ -92,7 +92,7 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Fortgeschrittene Elektronische Signatur ähnelt.
+        '''  Looks up a localized string similar to Fortgeschrittene Elektronische Signatur.
         '''</summary>
         Public Shared ReadOnly Property AdvancedElectronicSignature() As String
             Get
@@ -101,7 +101,7 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Abgeschlossen ähnelt.
+        '''  Looks up a localized string similar to Abgeschlossen.
         '''</summary>
         Public Shared ReadOnly Property Completed() As String
             Get
@@ -110,7 +110,16 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Vollständig Signiert ähnelt.
+        '''  Looks up a localized string similar to Vollständig bestätigt.
+        '''</summary>
+        Public Shared ReadOnly Property CompletelyConfirmed() As String
+            Get
+                Return ResourceManager.GetString("CompletelyConfirmed", resourceCulture)
+            End Get
+        End Property
+        
+        '''<summary>
+        '''  Looks up a localized string similar to Vollständig signiert.
         '''</summary>
         Public Shared ReadOnly Property CompletelySigned() As String
             Get
@@ -119,7 +128,25 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Vertrag ähnelt.
+        '''  Looks up a localized string similar to Lesebestätigung.
+        '''</summary>
+        Public Shared ReadOnly Property Confirmation() As String
+            Get
+                Return ResourceManager.GetString("Confirmation", resourceCulture)
+            End Get
+        End Property
+        
+        '''<summary>
+        '''  Looks up a localized string similar to Gelesen und Bestätigt.
+        '''</summary>
+        Public Shared ReadOnly Property Confirmed() As String
+            Get
+                Return ResourceManager.GetString("Confirmed", resourceCulture)
+            End Get
+        End Property
+        
+        '''<summary>
+        '''  Looks up a localized string similar to Vertrag.
         '''</summary>
         Public Shared ReadOnly Property Contract() As String
             Get
@@ -128,7 +155,7 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Erstellt ähnelt.
+        '''  Looks up a localized string similar to Erstellt.
         '''</summary>
         Public Shared ReadOnly Property Created() As String
             Get
@@ -137,7 +164,16 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Dokument Rotation geändert ähnelt.
+        '''  Looks up a localized string similar to Dokument gelesen und bestätigt.
+        '''</summary>
+        Public Shared ReadOnly Property DocumentConfirmed() As String
+            Get
+                Return ResourceManager.GetString("DocumentConfirmed", resourceCulture)
+            End Get
+        End Property
+        
+        '''<summary>
+        '''  Looks up a localized string similar to Dokument Rotation geändert.
         '''</summary>
         Public Shared ReadOnly Property DocumentMod_Rotation() As String
             Get
@@ -146,7 +182,7 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Dokument geöffnet ähnelt.
+        '''  Looks up a localized string similar to Dokument geöffnet.
         '''</summary>
         Public Shared ReadOnly Property DocumentOpened() As String
             Get
@@ -155,7 +191,7 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Unterzeichnung abgelehnt ähnelt.
+        '''  Looks up a localized string similar to Unterzeichnung abgelehnt.
         '''</summary>
         Public Shared ReadOnly Property DocumentRejected() As String
             Get
@@ -164,7 +200,16 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Dokument unterzeichnet ähnelt.
+        '''  Looks up a localized string similar to Lesebestätigung abgelehnt.
+        '''</summary>
+        Public Shared ReadOnly Property DocumentRejectedRaC() As String
+            Get
+                Return ResourceManager.GetString("DocumentRejectedRaC", resourceCulture)
+            End Get
+        End Property
+        
+        '''<summary>
+        '''  Looks up a localized string similar to Dokument unterzeichnet.
         '''</summary>
         Public Shared ReadOnly Property DocumentSigned() As String
             Get
@@ -173,7 +218,7 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Entwurf ähnelt.
+        '''  Looks up a localized string similar to Entwurf.
         '''</summary>
         Public Shared ReadOnly Property Draft() As String
             Get
@@ -182,7 +227,7 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Archiviert ähnelt.
+        '''  Looks up a localized string similar to Archiviert.
         '''</summary>
         Public Shared ReadOnly Property EnvelopeArchived() As String
             Get
@@ -191,7 +236,16 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Vollständig signiert ähnelt.
+        '''  Looks up a localized string similar to Vollständig bestätigt.
+        '''</summary>
+        Public Shared ReadOnly Property EnvelopeCompletelyConfirmed() As String
+            Get
+                Return ResourceManager.GetString("EnvelopeCompletelyConfirmed", resourceCulture)
+            End Get
+        End Property
+        
+        '''<summary>
+        '''  Looks up a localized string similar to Vollständig signiert.
         '''</summary>
         Public Shared ReadOnly Property EnvelopeCompletelySigned() As String
             Get
@@ -200,7 +254,7 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Umschlag Erstellt ähnelt.
+        '''  Looks up a localized string similar to Umschlag Erstellt.
         '''</summary>
         Public Shared ReadOnly Property EnvelopeCreated() As String
             Get
@@ -209,7 +263,7 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Umschlag Gelöscht ähnelt.
+        '''  Looks up a localized string similar to Umschlag Gelöscht.
         '''</summary>
         Public Shared ReadOnly Property EnvelopeDeleted() As String
             Get
@@ -218,7 +272,16 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Teil-Signiert ähnelt.
+        '''  Looks up a localized string similar to Teil-Bestätigt.
+        '''</summary>
+        Public Shared ReadOnly Property EnvelopePartlyConfirmed() As String
+            Get
+                Return ResourceManager.GetString("EnvelopePartlyConfirmed", resourceCulture)
+            End Get
+        End Property
+        
+        '''<summary>
+        '''  Looks up a localized string similar to Teil-Signiert.
         '''</summary>
         Public Shared ReadOnly Property EnvelopePartlySigned() As String
             Get
@@ -227,7 +290,7 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Umschlag in Queue ähnelt.
+        '''  Looks up a localized string similar to Umschlag in Queue.
         '''</summary>
         Public Shared ReadOnly Property EnvelopeQueued() As String
             Get
@@ -236,7 +299,7 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Umschlag abgelehnt ähnelt.
+        '''  Looks up a localized string similar to Umschlag abgelehnt.
         '''</summary>
         Public Shared ReadOnly Property EnvelopeRejected() As String
             Get
@@ -245,7 +308,7 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Signierungszertifikat erstellt ähnelt.
+        '''  Looks up a localized string similar to Signierungszertifikat erstellt.
         '''</summary>
         Public Shared ReadOnly Property EnvelopeReportCreated() As String
             Get
@@ -254,7 +317,16 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Gespeichert ähnelt.
+        '''  Looks up a localized string similar to Lesebestätigungszertifikat erstellt.
+        '''</summary>
+        Public Shared ReadOnly Property EnvelopeReportCreatedRaC() As String
+            Get
+                Return ResourceManager.GetString("EnvelopeReportCreatedRaC", resourceCulture)
+            End Get
+        End Property
+        
+        '''<summary>
+        '''  Looks up a localized string similar to Gespeichert.
         '''</summary>
         Public Shared ReadOnly Property EnvelopeSaved() As String
             Get
@@ -263,7 +335,7 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Gesendet ähnelt.
+        '''  Looks up a localized string similar to Gesendet.
         '''</summary>
         Public Shared ReadOnly Property EnvelopeSent() As String
             Get
@@ -272,7 +344,7 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Umschlag zurückgezogen ähnelt.
+        '''  Looks up a localized string similar to Umschlag zurückgezogen.
         '''</summary>
         Public Shared ReadOnly Property EnvelopeWithdrawn() As String
             Get
@@ -281,7 +353,7 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Zugriffscode versendet ähnelt.
+        '''  Looks up a localized string similar to Zugriffscode versendet.
         '''</summary>
         Public Shared ReadOnly Property MessageAccessCodeSent() As String
             Get
@@ -290,7 +362,7 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Abschlussemail versendet ähnelt.
+        '''  Looks up a localized string similar to Abschlussemail versendet.
         '''</summary>
         Public Shared ReadOnly Property MessageCompletionSent() As String
             Get
@@ -299,7 +371,7 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Signaturbestätigung versendet ähnelt.
+        '''  Looks up a localized string similar to Signaturbestätigung versendet.
         '''</summary>
         Public Shared ReadOnly Property MessageConfirmationSent() As String
             Get
@@ -308,7 +380,16 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Löschinformation versendet ähnelt.
+        '''  Looks up a localized string similar to Lesebestätigung versendet.
+        '''</summary>
+        Public Shared ReadOnly Property MessageConfirmationSentRaC() As String
+            Get
+                Return ResourceManager.GetString("MessageConfirmationSentRaC", resourceCulture)
+            End Get
+        End Property
+        
+        '''<summary>
+        '''  Looks up a localized string similar to Löschinformation versendet.
         '''</summary>
         Public Shared ReadOnly Property MessageDeletionSent() As String
             Get
@@ -317,7 +398,7 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Dokumentenlink versendet ähnelt.
+        '''  Looks up a localized string similar to Dokumentenlink versendet.
         '''</summary>
         Public Shared ReadOnly Property MessageInvitationSent() As String
             Get
@@ -326,7 +407,7 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Nein ähnelt.
+        '''  Looks up a localized string similar to Nein.
         '''</summary>
         Public Shared ReadOnly Property No() As String
             Get
@@ -335,7 +416,16 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Teil-Signiert ähnelt.
+        '''  Looks up a localized string similar to Teil-Bestätigt.
+        '''</summary>
+        Public Shared ReadOnly Property PartlyConfirmed() As String
+            Get
+                Return ResourceManager.GetString("PartlyConfirmed", resourceCulture)
+            End Get
+        End Property
+        
+        '''<summary>
+        '''  Looks up a localized string similar to Teil-Signiert.
         '''</summary>
         Public Shared ReadOnly Property PartlySigned() As String
             Get
@@ -344,7 +434,7 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Qualifizierte Signatur ähnelt.
+        '''  Looks up a localized string similar to Qualifizierte Signatur.
         '''</summary>
         Public Shared ReadOnly Property QualifiedSignature() As String
             Get
@@ -353,7 +443,7 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Arbeitsanweisung ähnelt.
+        '''  Looks up a localized string similar to Lesebestätigung.
         '''</summary>
         Public Shared ReadOnly Property ReadAndSign() As String
             Get
@@ -362,7 +452,7 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Wollen Sie die 2-Faktor Definition für diesen Empfänger zurücksetzen. Der Empfänger muss sich dann neu identifizieren! ähnelt.
+        '''  Looks up a localized string similar to Wollen Sie die 2-Faktor Definition für diesen Empfänger zurücksetzen. Der Empfänger muss sich dann neu identifizieren!.
         '''</summary>
         Public Shared ReadOnly Property ResetTOTPUser() As String
             Get
@@ -371,7 +461,7 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Gespeichert ähnelt.
+        '''  Looks up a localized string similar to Gespeichert.
         '''</summary>
         Public Shared ReadOnly Property Saved() As String
             Get
@@ -380,7 +470,7 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Gesendet ähnelt.
+        '''  Looks up a localized string similar to Gesendet.
         '''</summary>
         Public Shared ReadOnly Property Sent() As String
             Get
@@ -389,7 +479,7 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Signatur ähnelt.
+        '''  Looks up a localized string similar to Signatur.
         '''</summary>
         Public Shared ReadOnly Property Signature() As String
             Get
@@ -398,7 +488,7 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Signatur bestätigt ähnelt.
+        '''  Looks up a localized string similar to Abschluss bestätigt.
         '''</summary>
         Public Shared ReadOnly Property SignatureConfirmed() As String
             Get
@@ -407,7 +497,7 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Signiert ähnelt.
+        '''  Looks up a localized string similar to Signiert.
         '''</summary>
         Public Shared ReadOnly Property Signed() As String
             Get
@@ -416,7 +506,7 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Erfolgreich! Dialog wird geschlossen. ähnelt.
+        '''  Looks up a localized string similar to Erfolgreich! Dialog wird geschlossen..
         '''</summary>
         Public Shared ReadOnly Property Success_FormClose() As String
             Get
@@ -425,7 +515,7 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Unsigniert ähnelt.
+        '''  Looks up a localized string similar to Unsigniert.
         '''</summary>
         Public Shared ReadOnly Property Unsigned() As String
             Get
@@ -434,7 +524,7 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Ja ähnelt.
+        '''  Looks up a localized string similar to Ja.
         '''</summary>
         Public Shared ReadOnly Property Yes() As String
             Get
@@ -443,7 +533,7 @@ Namespace My.Resources
         End Property
         
         '''<summary>
-        '''  Sucht eine lokalisierte Zeichenfolge, die Ja, mit Anhang ähnelt.
+        '''  Looks up a localized string similar to Ja, mit Anhang.
         '''</summary>
         Public Shared ReadOnly Property YesWithAttachment() As String
             Get

EnvelopeGenerator.CommonServices/Strings/Model.en.resx

@@ -132,12 +132,27 @@
   <data name="Completed" xml:space="preserve">
     <value>Completed</value>
   </data>
+  <data name="CompletelyConfirmed" xml:space="preserve">
+    <value>Completely confirmed</value>
+  </data>
+  <data name="CompletelySigned" xml:space="preserve">
+    <value>Completely signed</value>
+  </data>
+  <data name="Confirmation" xml:space="preserve">
+    <value>Read Confirmation</value>
+  </data>
+  <data name="Confirmed" xml:space="preserve">
+    <value>Read and signed</value>
+  </data>
   <data name="Contract" xml:space="preserve">
     <value>Contract</value>
   </data>
   <data name="Created" xml:space="preserve">
     <value>Created</value>
   </data>
+  <data name="DocumentConfirmed" xml:space="preserve">
+    <value>Document read and confirmed</value>
+  </data>
   <data name="DocumentMod_Rotation" xml:space="preserve">
     <value>Document rotation adapted</value>
   </data>
@@ -147,6 +162,9 @@
   <data name="DocumentRejected" xml:space="preserve">
     <value>Signing rejected</value>
   </data>
+  <data name="DocumentRejectedRaC" xml:space="preserve">
+    <value>Read confirmation rejected</value>
+  </data>
   <data name="DocumentSigned" xml:space="preserve">
     <value>Document signed</value>
   </data>
@@ -156,6 +174,9 @@
   <data name="EnvelopeArchived" xml:space="preserve">
     <value>Archived</value>
   </data>
+  <data name="EnvelopeCompletelyConfirmed" xml:space="preserve">
+    <value>Completely confirmed</value>
+  </data>
   <data name="EnvelopeCompletelySigned" xml:space="preserve">
     <value>Completely signed</value>
   </data>
@@ -165,8 +186,11 @@
   <data name="EnvelopeDeleted" xml:space="preserve">
     <value>Envelope Deleted</value>
   </data>
+  <data name="EnvelopePartlyConfirmed" xml:space="preserve">
+    <value>Partially confirmed</value>
+  </data>
   <data name="EnvelopePartlySigned" xml:space="preserve">
-    <value>Partly signed</value>
+    <value>Partially signed</value>
   </data>
   <data name="EnvelopeQueued" xml:space="preserve">
     <value>Envelope Queued</value>
@@ -177,6 +201,9 @@
   <data name="EnvelopeReportCreated" xml:space="preserve">
     <value>Signature certificate created</value>
   </data>
+  <data name="EnvelopeReportCreatedRaC" xml:space="preserve">
+    <value>Read Confirmation Certificate Created</value>
+  </data>
   <data name="EnvelopeSaved" xml:space="preserve">
     <value>Saved</value>
   </data>
@@ -195,6 +222,9 @@
   <data name="MessageConfirmationSent" xml:space="preserve">
     <value>Confirmation Sent</value>
   </data>
+  <data name="MessageConfirmationSentRaC" xml:space="preserve">
+    <value>Read Confirmation Sent</value>
+  </data>
   <data name="MessageDeletionSent" xml:space="preserve">
     <value>Deletion Notice Sent</value>
   </data>
@@ -204,6 +234,12 @@
   <data name="No" xml:space="preserve">
     <value>No</value>
   </data>
+  <data name="PartlyConfirmed" xml:space="preserve">
+    <value>Partially confirmed</value>
+  </data>
+  <data name="PartlySigned" xml:space="preserve">
+    <value>Partially signed</value>
+  </data>
   <data name="QualifiedSignature" xml:space="preserve">
     <value>Qualified Signature</value>
   </data>
@@ -223,7 +259,7 @@
     <value>Signature</value>
   </data>
   <data name="SignatureConfirmed" xml:space="preserve">
-    <value>Signature confirmed</value>
+    <value>Finalization confirmed</value>
   </data>
   <data name="Signed" xml:space="preserve">
     <value>Signed</value>

EnvelopeGenerator.CommonServices/Strings/Model.resx

@@ -132,8 +132,17 @@
   <data name="Completed" xml:space="preserve">
     <value>Abgeschlossen</value>
   </data>
+  <data name="CompletelyConfirmed" xml:space="preserve">
+    <value>Vollständig bestätigt</value>
+  </data>
   <data name="CompletelySigned" xml:space="preserve">
-    <value>Vollständig Signiert</value>
+    <value>Vollständig signiert</value>
+  </data>
+  <data name="Confirmation" xml:space="preserve">
+    <value>Lesebestätigung</value>
+  </data>
+  <data name="Confirmed" xml:space="preserve">
+    <value>Gelesen und Bestätigt</value>
   </data>
   <data name="Contract" xml:space="preserve">
     <value>Vertrag</value>
@@ -141,6 +150,9 @@
   <data name="Created" xml:space="preserve">
     <value>Erstellt</value>
   </data>
+  <data name="DocumentConfirmed" xml:space="preserve">
+    <value>Dokument gelesen und bestätigt</value>
+  </data>
   <data name="DocumentMod_Rotation" xml:space="preserve">
     <value>Dokument Rotation geändert</value>
   </data>
@@ -150,6 +162,9 @@
   <data name="DocumentRejected" xml:space="preserve">
     <value>Unterzeichnung abgelehnt</value>
   </data>
+  <data name="DocumentRejectedRaC" xml:space="preserve">
+    <value>Lesebestätigung abgelehnt</value>
+  </data>
   <data name="DocumentSigned" xml:space="preserve">
     <value>Dokument unterzeichnet</value>
   </data>
@@ -159,6 +174,9 @@
   <data name="EnvelopeArchived" xml:space="preserve">
     <value>Archiviert</value>
   </data>
+  <data name="EnvelopeCompletelyConfirmed" xml:space="preserve">
+    <value>Vollständig bestätigt</value>
+  </data>
   <data name="EnvelopeCompletelySigned" xml:space="preserve">
     <value>Vollständig signiert</value>
   </data>
@@ -168,6 +186,9 @@
   <data name="EnvelopeDeleted" xml:space="preserve">
     <value>Umschlag Gelöscht</value>
   </data>
+  <data name="EnvelopePartlyConfirmed" xml:space="preserve">
+    <value>Teil-Bestätigt</value>
+  </data>
   <data name="EnvelopePartlySigned" xml:space="preserve">
     <value>Teil-Signiert</value>
   </data>
@@ -180,6 +201,9 @@
   <data name="EnvelopeReportCreated" xml:space="preserve">
     <value>Signierungszertifikat erstellt</value>
   </data>
+  <data name="EnvelopeReportCreatedRaC" xml:space="preserve">
+    <value>Lesebestätigungszertifikat erstellt</value>
+  </data>
   <data name="EnvelopeSaved" xml:space="preserve">
     <value>Gespeichert</value>
   </data>
@@ -198,6 +222,9 @@
   <data name="MessageConfirmationSent" xml:space="preserve">
     <value>Signaturbestätigung versendet</value>
   </data>
+  <data name="MessageConfirmationSentRaC" xml:space="preserve">
+    <value>Lesebestätigung versendet</value>
+  </data>
   <data name="MessageDeletionSent" xml:space="preserve">
     <value>Löschinformation versendet</value>
   </data>
@@ -207,6 +234,9 @@
   <data name="No" xml:space="preserve">
     <value>Nein</value>
   </data>
+  <data name="PartlyConfirmed" xml:space="preserve">
+    <value>Teil-Bestätigt</value>
+  </data>
   <data name="PartlySigned" xml:space="preserve">
     <value>Teil-Signiert</value>
   </data>
@@ -214,7 +244,7 @@
     <value>Qualifizierte Signatur</value>
   </data>
   <data name="ReadAndSign" xml:space="preserve">
-    <value>Arbeitsanweisung</value>
+    <value>Lesebestätigung</value>
   </data>
   <data name="ResetTOTPUser" xml:space="preserve">
     <value>Wollen Sie die 2-Faktor Definition für diesen Empfänger zurücksetzen. Der Empfänger muss sich dann neu identifizieren!</value>
@@ -229,7 +259,7 @@
     <value>Signatur</value>
   </data>
   <data name="SignatureConfirmed" xml:space="preserve">
-    <value>Signatur bestätigt</value>
+    <value>Abschluss bestätigt</value>
   </data>
   <data name="Signed" xml:space="preserve">
     <value>Signiert</value>

EnvelopeGenerator.DependencyInjection/DependencyInjection.cs

@@ -0,0 +1,145 @@
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using EnvelopeGenerator.Application;
+using EnvelopeGenerator.Application.Common.Interfaces.Services;
+using EnvelopeGenerator.Application.Services;
+using EnvelopeGenerator.Infrastructure;
+using DigitalData.EmailProfilerDispatcher;
+using DigitalData.UserManager.DependencyInjection;
+
+namespace EnvelopeGenerator.DependencyInjection;
+
+/// <summary>
+/// Controls which optional services are registered by <see cref="DependencyInjection.AddEnvelopeGenerator"/>.
+/// All flags default to <c>true</c>. Set a flag to <c>false</c> if the consuming project
+/// already registers that service itself or simply does not need it.
+/// </summary>
+public sealed class EnvelopeGeneratorOptions
+{
+    /// <summary>Calls <c>AddHttpContextAccessor()</c>. Default: <c>true</c>.</summary>
+    public bool AddHttpContextAccessor { get; set; } = true;
+
+    /// <summary>
+    /// Calls <c>AddDistributedSqlServerCache()</c> with the supplied <see cref="SqlCacheOptions"/>.
+    /// Requires <see cref="SqlCacheOptions"/> to be configured. Default: <c>true</c>.
+    /// </summary>
+    public bool AddDistributedSqlServerCache { get; set; } = true;
+
+    /// <summary>
+    /// Options for the distributed SQL Server cache.
+    /// Required when <see cref="AddDistributedSqlServerCache"/> is <c>true</c>.
+    /// </summary>
+    public SqlCacheOptions? SqlCacheOptions { get; set; }
+
+    /// <summary>Calls <c>AddDispatcher&lt;TDbContext&gt;()</c>. Default: <c>true</c>.</summary>
+    public bool AddDispatcher { get; set; } = true;
+
+    /// <summary>Calls <c>AddMemoryCache()</c>. Default: <c>true</c>.</summary>
+    public bool AddMemoryCache { get; set; } = true;
+
+    /// <summary>Calls <c>AddUserManager&lt;TDbContext&gt;()</c>. Default: <c>true</c>.</summary>
+    public bool AddUserManager { get; set; } = true;
+}
+
+/// <summary>Options for <c>AddDistributedSqlServerCache</c>.</summary>
+public sealed class SqlCacheOptions
+{
+    /// <summary>SQL Server connection string.</summary>
+    public string ConnectionString { get; set; } = string.Empty;
+
+    /// <summary>Schema name. Default: <c>dbo</c>.</summary>
+    public string SchemaName { get; set; } = "dbo";
+
+    /// <summary>Table name. Default: <c>TBDD_CACHE</c>.</summary>
+    public string TableName { get; set; } = "TBDD_CACHE";
+}
+
+/// <summary>
+/// Extension methods for registering EnvelopeGenerator services into an <see cref="IServiceCollection"/>.
+/// Use <see cref="AddEnvelopeGenerator{TDbContext}"/> as the single entry-point for projects that need both the
+/// application layer (MediatR, AutoMapper, CRUD services, configuration sections) and the infrastructure
+/// layer (repositories, DbContext, SQL executors).
+/// For projects that do not need a database (e.g. lightweight API gateways or unit-test hosts), use
+/// <see cref="AddEnvelopeGeneratorCore"/> to register only the application layer.
+/// </summary>
+public static class DependencyInjection
+{
+    /// <summary>
+    /// Registers the full EnvelopeGenerator stack using <see cref="EGDbContext"/> as the DbContext type.
+    /// </summary>
+    public static IServiceCollection AddEnvelopeGenerator(
+        this IServiceCollection services,
+        IConfiguration configuration,
+        Action<EnvelopeGenerator.Infrastructure.DependencyInjection.Config>? infrastructureOptions = null,
+        Action<EnvelopeGeneratorOptions>? options = null)
+    {
+        var opt = new EnvelopeGeneratorOptions();
+        options?.Invoke(opt);
+
+#pragma warning disable CS0618
+        // Application layer: CRUD services, MediatR, AutoMapper, configuration sections.
+        services.AddEnvelopeGeneratorServices(configuration);
+
+        // Infrastructure layer: repositories, DbContext, Dapper type maps, SQL executors.
+        services.AddEnvelopeGeneratorInfrastructureServices(cfg =>
+        {
+            infrastructureOptions?.Invoke(cfg);
+        });
+#pragma warning restore CS0618
+
+        if (opt.AddHttpContextAccessor)
+            services.AddHttpContextAccessor();
+
+        if (opt.AddDistributedSqlServerCache && opt.SqlCacheOptions is { } cacheOpts)
+            services.AddDistributedSqlServerCache(o =>
+            {
+                o.ConnectionString = cacheOpts.ConnectionString;
+                o.SchemaName = cacheOpts.SchemaName;
+                o.TableName = cacheOpts.TableName;
+            });
+
+        if (opt.AddDispatcher)
+            services.AddDispatcher<EGDbContext>();
+
+        if (opt.AddMemoryCache)
+            services.AddMemoryCache();
+
+#pragma warning disable CS0618
+        if (opt.AddUserManager)
+            services.AddUserManager<EGDbContext>();
+#pragma warning restore CS0618
+
+        return services;
+    }
+
+    /// <summary>
+    /// Registers only the <em>application</em> layer services (MediatR handlers, AutoMapper profiles,
+    /// CRUD services, configuration sections) without any infrastructure / database dependencies.
+    /// </summary>
+    /// <param name="services">Service collection to register services into.</param>
+    /// <param name="configuration">Application configuration used to bind application-level option sections.</param>
+    /// <returns>The updated <see cref="IServiceCollection"/>.</returns>
+#pragma warning disable CS0618
+    public static IServiceCollection AddEnvelopeGeneratorCore(
+        this IServiceCollection services,
+        IConfiguration configuration)
+    {
+        services.AddEnvelopeGeneratorServices(configuration);
+        return services;
+    }
+#pragma warning restore CS0618
+
+    /// <summary>
+    /// Registers <see cref="EnvelopeMailService"/> as the <see cref="IEnvelopeMailService"/> scoped
+    /// implementation.
+    /// </summary>
+    /// <param name="services">Service collection to register services into.</param>
+    /// <returns>The updated <see cref="IServiceCollection"/>.</returns>
+#pragma warning disable CS0618
+    public static IServiceCollection AddEnvelopeMailService(this IServiceCollection services)
+    {
+        services.AddScoped<IEnvelopeMailService, EnvelopeMailService>();
+        return services;
+    }
+#pragma warning restore CS0618
+}

EnvelopeGenerator.DependencyInjection/EnvelopeGenerator.DependencyInjection.csproj

@@ -0,0 +1,176 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFrameworks>net7.0;net8.0;net9.0</TargetFrameworks>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+
+    <!-- NuGet package metadata -->
+    <PackageId>EnvelopeGenerator</PackageId>
+    <Authors>Digital Data GmbH</Authors>
+    <Company>Digital Data GmbH</Company>
+    <Product>EnvelopeGenerator</Product>
+    <Description>
+      Envelope Generator ist eine Bibliothek zur Verwaltung und Verarbeitung digitaler Umschläge (Envelopes).
+      Dieses Paket enthält die Dependency-Injection-Erweiterungsmethoden und bündelt die Application-
+      sowie Infrastructure-Schicht in einer einzigen NuGet-Referenz.
+    </Description>
+    <Copyright>Copyright 2024 Digital Data GmbH</Copyright>
+    <RepositoryUrl>http://git.dd:3000/AppStd/EnvelopeGenerator.git</RepositoryUrl>
+    <PackageTags>digital data envelope generator di dependency injection</PackageTags>
+    <PackageRequireLicenseAcceptance>false</PackageRequireLicenseAcceptance>
+    <Version>1.2.0.3</Version>
+    <AssemblyVersion>1.2.0.3</AssemblyVersion>
+    <FileVersion>1.2.0.3</FileVersion>
+    <GeneratePackageOnBuild>false</GeneratePackageOnBuild>
+  </PropertyGroup>
+
+  <!-- ASP.NET Core shared framework (AddHttpContextAccessor, AddMemoryCache, etc.) -->
+  <ItemGroup>
+    <FrameworkReference Include="Microsoft.AspNetCore.App" />
+  </ItemGroup>
+
+  <!--
+    All dependencies are declared here.
+    Because Application and Infrastructure DLLs are bundled via PrivateAssets=all,
+    their PackageReferences have been moved to this project so that the correct
+    dependencies are written to the nuspec and a consuming project works with
+    a single package install.
+  -->
+  <ItemGroup>
+    <!-- DigitalData BaGet packages -->
+    <PackageReference Include="DigitalData.Core.Abstraction.Application" Version="1.6.0" />
+    <PackageReference Include="DigitalData.Core.Application" Version="3.4.0" />
+    <PackageReference Include="DigitalData.Core.Client" Version="2.1.0" />
+    <PackageReference Include="DigitalData.Core.Exceptions" Version="1.1.0" />
+    <PackageReference Include="DigitalData.Core.Infrastructure" Version="2.6.1" />
+    <PackageReference Include="DigitalData.EmailProfilerDispatcher" Version="3.1.1" />
+    <PackageReference Include="UserManager" Version="1.1.3" />
+
+    <!-- ORM / Database -->
+    <PackageReference Include="Dapper" Version="2.1.66" />
+    <PackageReference Include="Microsoft.Data.SqlClient" Version="5.2.2" />
+
+    <!-- Application services -->
+    <PackageReference Include="MediatR" Version="12.5.0" />
+    <PackageReference Include="QRCoder" Version="1.6.0" />
+    <PackageReference Include="QRCoder-ImageSharp" Version="0.10.0" />
+    <PackageReference Include="QuestPDF" Version="2025.7.1" />
+    <PackageReference Include="Otp.NET" Version="1.4.0" />
+
+    <!-- Security / Identity -->
+    <PackageReference Include="Microsoft.Identity.Client" Version="4.82.1" />
+
+    <!-- Utilities -->
+    <PackageReference Include="HtmlSanitizer" Version="9.0.892" />
+    <PackageReference Include="SixLabors.ImageSharp" Version="3.1.12" />
+    <PackageReference Include="System.Formats.Asn1" Version="10.0.3" />
+    <PackageReference Include="System.Security.AccessControl" Version="6.0.1" />
+
+    <!-- DI abstractions -->
+    <PackageReference Include="Microsoft.Extensions.Configuration.Abstractions" Version="9.0.6" />
+    <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="9.0.6" />
+  </ItemGroup>
+
+  <!-- TFM-specific packages -->
+  <ItemGroup Condition="'$(TargetFramework)' == 'net7.0'">
+    <PackageReference Include="AutoMapper" Version="13.0.1" />
+    <PackageReference Include="CommandDotNet" Version="7.0.5" />
+    <PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="7.0.20" />
+    <PackageReference Include="Microsoft.Extensions.Caching.SqlServer" Version="7.0.20" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="7.0.20" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Relational" Version="7.0.20" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="7.0.20" />
+  </ItemGroup>
+
+  <ItemGroup Condition="'$(TargetFramework)' == 'net8.0'">
+    <PackageReference Include="AutoMapper" Version="14.0.0" />
+    <PackageReference Include="CommandDotNet" Version="8.1.1" />
+    <PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="8.0.17" />
+    <PackageReference Include="Microsoft.Extensions.Caching.SqlServer" Version="8.0.17" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="8.0.17" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Relational" Version="8.0.17" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="8.0.17" />
+  </ItemGroup>
+
+  <ItemGroup Condition="'$(TargetFramework)' == 'net9.0'">
+    <PackageReference Include="AutoMapper" Version="14.0.0" />
+    <PackageReference Include="CommandDotNet" Version="8.1.1" />
+    <PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="9.0.6" />
+    <PackageReference Include="Microsoft.Extensions.Caching.SqlServer" Version="9.0.6" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="9.0.6" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Relational" Version="9.0.6" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="9.0.6" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\EnvelopeGenerator.Application\EnvelopeGenerator.Application.csproj">
+      <PrivateAssets>all</PrivateAssets>
+    </ProjectReference>
+    <ProjectReference Include="..\EnvelopeGenerator.Domain\EnvelopeGenerator.Domain.csproj">
+      <PrivateAssets>all</PrivateAssets>
+    </ProjectReference>
+    <ProjectReference Include="..\EnvelopeGenerator.Infrastructure\EnvelopeGenerator.Infrastructure.csproj">
+      <PrivateAssets>all</PrivateAssets>
+    </ProjectReference>
+  </ItemGroup>
+
+  <!-- Bundle dependency DLLs into the package lib folder -->
+  <Target Name="IncludeDependencyDlls" BeforeTargets="_GetPackageFiles">
+    <ItemGroup>
+      <_DepDlls Include="&#xD;&#xA;        ..\EnvelopeGenerator.Application\bin\$(Configuration)\%(ProjectReference.TargetFramework)\EnvelopeGenerator.Application.dll;&#xD;&#xA;        ..\EnvelopeGenerator.Domain\bin\$(Configuration)\%(ProjectReference.TargetFramework)\EnvelopeGenerator.Domain.dll;&#xD;&#xA;        ..\EnvelopeGenerator.Infrastructure\bin\$(Configuration)\%(ProjectReference.TargetFramework)\EnvelopeGenerator.Infrastructure.dll" />
+    </ItemGroup>
+  </Target>
+
+  <!--
+    Rebuild all dependency projects for every TFM before packing so that
+    the DLLs bundled into the package are always up-to-date.
+    Run with: dotnet pack -c Release
+  -->
+  <Target Name="RebuildDependenciesBeforePack" BeforeTargets="GenerateNuspec">
+    <MSBuild Projects="..\EnvelopeGenerator.Application\EnvelopeGenerator.Application.csproj"
+             Targets="Build"
+             Properties="Configuration=$(Configuration);TargetFramework=net7.0" />
+    <MSBuild Projects="..\EnvelopeGenerator.Application\EnvelopeGenerator.Application.csproj"
+             Targets="Build"
+             Properties="Configuration=$(Configuration);TargetFramework=net8.0" />
+    <MSBuild Projects="..\EnvelopeGenerator.Application\EnvelopeGenerator.Application.csproj"
+             Targets="Build"
+             Properties="Configuration=$(Configuration);TargetFramework=net9.0" />
+
+    <MSBuild Projects="..\EnvelopeGenerator.Domain\EnvelopeGenerator.Domain.csproj"
+             Targets="Build"
+             Properties="Configuration=$(Configuration);TargetFramework=net7.0" />
+    <MSBuild Projects="..\EnvelopeGenerator.Domain\EnvelopeGenerator.Domain.csproj"
+             Targets="Build"
+             Properties="Configuration=$(Configuration);TargetFramework=net8.0" />
+    <MSBuild Projects="..\EnvelopeGenerator.Domain\EnvelopeGenerator.Domain.csproj"
+             Targets="Build"
+             Properties="Configuration=$(Configuration);TargetFramework=net9.0" />
+
+    <MSBuild Projects="..\EnvelopeGenerator.Infrastructure\EnvelopeGenerator.Infrastructure.csproj"
+             Targets="Build"
+             Properties="Configuration=$(Configuration);TargetFramework=net7.0" />
+    <MSBuild Projects="..\EnvelopeGenerator.Infrastructure\EnvelopeGenerator.Infrastructure.csproj"
+             Targets="Build"
+             Properties="Configuration=$(Configuration);TargetFramework=net8.0" />
+    <MSBuild Projects="..\EnvelopeGenerator.Infrastructure\EnvelopeGenerator.Infrastructure.csproj"
+             Targets="Build"
+             Properties="Configuration=$(Configuration);TargetFramework=net9.0" />
+  </Target>
+
+  <Target Name="BundleReferencedDlls" AfterTargets="Build">
+    <ItemGroup>
+      <BuildOutputInPackage Include="..\EnvelopeGenerator.Application\bin\$(Configuration)\net7.0\EnvelopeGenerator.Application.dll" TargetFramework="net7.0" />
+      <BuildOutputInPackage Include="..\EnvelopeGenerator.Application\bin\$(Configuration)\net8.0\EnvelopeGenerator.Application.dll" TargetFramework="net8.0" />
+      <BuildOutputInPackage Include="..\EnvelopeGenerator.Application\bin\$(Configuration)\net9.0\EnvelopeGenerator.Application.dll" TargetFramework="net9.0" />
+      <BuildOutputInPackage Include="..\EnvelopeGenerator.Domain\bin\$(Configuration)\net7.0\EnvelopeGenerator.Domain.dll" TargetFramework="net7.0" />
+      <BuildOutputInPackage Include="..\EnvelopeGenerator.Domain\bin\$(Configuration)\net8.0\EnvelopeGenerator.Domain.dll" TargetFramework="net8.0" />
+      <BuildOutputInPackage Include="..\EnvelopeGenerator.Domain\bin\$(Configuration)\net9.0\EnvelopeGenerator.Domain.dll" TargetFramework="net9.0" />
+      <BuildOutputInPackage Include="..\EnvelopeGenerator.Infrastructure\bin\$(Configuration)\net7.0\EnvelopeGenerator.Infrastructure.dll" TargetFramework="net7.0" />
+      <BuildOutputInPackage Include="..\EnvelopeGenerator.Infrastructure\bin\$(Configuration)\net8.0\EnvelopeGenerator.Infrastructure.dll" TargetFramework="net8.0" />
+      <BuildOutputInPackage Include="..\EnvelopeGenerator.Infrastructure\bin\$(Configuration)\net9.0\EnvelopeGenerator.Infrastructure.dll" TargetFramework="net9.0" />
+    </ItemGroup>
+  </Target>
+
+</Project>

EnvelopeGenerator.Domain/Constants/SenderAppType.cs

@@ -0,0 +1,8 @@
+namespace EnvelopeGenerator.Domain.Constants
+{
+    public enum SenderAppType
+    {
+        LegacyFormApp = 0,
+        ReceiverUIBlazorApp = 1
+    }
+}

EnvelopeGenerator.Domain/Entities/Config.cs

@@ -1,17 +1,11 @@
 using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;
-#if NETFRAMEWORK
-using System;
-#endif
 
 namespace EnvelopeGenerator.Domain.Entities
 {
     [Table("TBSIG_CONFIG", Schema = "dbo")]
     public class Config
     {
-        [Column("DOCUMENT_PATH", TypeName = "nvarchar(256)")]
-        public string DocumentPath { get; set; }
-
         [Column("SENDING_PROFILE", TypeName = "int")]
         [Required]
         public int SendingProfile { get; set; }
@@ -25,24 +19,5 @@ namespace EnvelopeGenerator.Domain.Entities
 
         [Column("EXPORT_PATH", TypeName = "nvarchar(256)")]
         public string ExportPath { get; set; }
-
-        [Column("ADDED_WHEN", TypeName = "datetime")]
-        [Required]
-        public DateTime AddedWhen { get; set; }
-
-        [Column("CHANGED_WHEN", TypeName = "datetime")]
-        public DateTime? ChangedWhen { get; set; }
-
-        [Column("GUID", TypeName = "tinyint")]
-        [Required]
-        public byte Guid { get; set; }
-
-        [Column("DEF_TFA_ENABLED", TypeName = "bit")]
-        [Required]
-        public bool DefTfaEnabled { get; set; }
-
-        [Column("DEF_TFA_WITH_PHONE", TypeName = "bit")]
-        [Required]
-        public bool DefTfaWithPhone { get; set; }
     }
 }

EnvelopeGenerator.Domain/Entities/DocumentStatus.cs

@@ -35,7 +35,6 @@ namespace EnvelopeGenerator.Domain.Entities
         [Column("STATUS")]
         public Constants.DocumentStatus Status { get; set; }
 
-        [Required]
         [Column("STATUS_CHANGED_WHEN", TypeName = "datetime")]
         public DateTime? StatusChangedWhen { get; set; }
 

EnvelopeGenerator.Domain/Entities/Envelope.cs

@@ -76,14 +76,11 @@ namespace EnvelopeGenerator.Domain.Entities
 #if nullable
         ?
 #endif
-            Title { get; set; }
+            Title
+        { get; set; }
 
         [Column("COMMENT", TypeName = "nvarchar(128)")]
-        public string
-#if nullable
-        ?
-#endif
-            Comment { get; set; }
+        public string Comment { get; set; }
 
         [Column("CONTRACT_TYPE")]
         public int? ContractType { get; set; }
@@ -140,9 +137,7 @@ namespace EnvelopeGenerator.Domain.Entities
             = false;
 #endif
 
-#if NETFRAMEWORK
         [NotMapped]
-#endif
         [Column("DOC_RESULT")]
         public byte[]
 #if nullable
@@ -156,7 +151,8 @@ namespace EnvelopeGenerator.Domain.Entities
 #if nullable
         ?
 #endif
-            Type { get; set; }
+            Type
+        { get; set; }
 
 #if NETFRAMEWORK
         [NotMapped]
@@ -170,26 +166,22 @@ namespace EnvelopeGenerator.Domain.Entities
 #if nullable
         ?
 #endif
-            Documents { get; set; }
-
-        [NotMapped]
-        public Document
-#if nullable
-        ?
-#endif
-            DefaultDocument => Documents?.FirstOrDefault();
+            Documents
+        { get; set; }
 
         public List<History>
 #if nullable
         ?
 #endif
-            Histories { get; set; }
+            Histories
+        { get; set; }
 
         public List<EnvelopeReceiver>
 #if nullable
         ?
 #endif
-            EnvelopeReceivers { get; set; }
+            EnvelopeReceivers
+        { get; set; }
 
         //#if NETFRAMEWORK
         /// <summary>

EnvelopeGenerator.Domain/Entities/EnvelopeReport.cs

@@ -1,36 +0,0 @@
-using System;
-using System.ComponentModel.DataAnnotations;
-using System.ComponentModel.DataAnnotations.Schema;
-
-namespace EnvelopeGenerator.Domain.Entities
-{
-    [Table("VWSIG_ENVELOPE_REPORT", Schema = "dbo")]
-    public class EnvelopeReport
-    {
-        [Column("ENVELOPE_ID", TypeName = "int")]
-        [Required]
-        public int EnvelopeId { get; set; }
-
-        [Column("HEAD_UUID", TypeName = "nvarchar(36)")]
-        [Required]
-        public string HeadUuid { get; set; }
-
-        [Column("HEAD_TITLE", TypeName = "nvarchar(128)")]
-        public string HeadTitle { get; set; }
-
-        [Column("HEAD_MESSAGE", TypeName = "nvarchar(max)")]
-        [Required]
-        public string HeadMessage { get; set; }
-
-        [Column("POS_STATUS", TypeName = "int")]
-        [Required]
-        public int PosStatus { get; set; }
-
-        [Column("POS_WHEN", TypeName = "datetime")]
-        public DateTime? PosWhen { get; set; }
-
-        [Column("POS_WHO", TypeName = "nvarchar(128)")]
-        [Required]
-        public string PosWho { get; set; }
-    }
-}

EnvelopeGenerator.Domain/Entities/Signature.cs

@@ -4,9 +4,6 @@ using System.ComponentModel;
 using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;
 using EnvelopeGenerator.Domain.Interfaces.Auditing;
-#if NET
-using System.Text.Json.Serialization;
-#endif
 #if NETFRAMEWORK
 using System.Collections.Generic;
 #endif
@@ -112,25 +109,22 @@ namespace EnvelopeGenerator.Domain.Entities
 #if nullable
         ?
 #endif
-            Receiver { get; set; }
+            Receiver
+        { get; set; }
 
         public virtual IEnumerable<ElementAnnotation>
 #if nullable
         ?
 #endif
-            Annotations { get; set; }
+            Annotations
+        { get; set; }
 
-#if NET
-        [JsonIgnore]
-#endif
+#if NETFRAMEWORK
         [NotMapped]
         public double Top => Math.Round(Y, 5);
 
-
-#if NET
-        [JsonIgnore]
-#endif
         [NotMapped]
         public double Left => Math.Round(X, 5);
+#endif
     }
 }

EnvelopeGenerator.Domain/Entities/ThirdPartyModule.cs

@@ -1,61 +0,0 @@
-using System.ComponentModel.DataAnnotations;
-using System.ComponentModel.DataAnnotations.Schema;
-using EnvelopeGenerator.Domain.Interfaces.Auditing;
-#if NETFRAMEWORK
-using System;
-#endif
-
-namespace EnvelopeGenerator.Domain.Entities
-{
-    [Table("TBDD_3RD_PARTY_MODULES", Schema = "dbo")]
-    public class ThirdPartyModule : IHasChangedWhen, IHasChangedWho
-    {
-        [Key]
-        [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
-        [Column("GUID")]
-        public int Id { get; set; }
-
-        [Required]
-        [Column("ACTIVE", TypeName = "bit")]
-        public bool Active { get; set; }
-
-        [Required]
-        [Column("NAME", TypeName = "varchar(50)")]
-        public string Name { get; set; }
-
-        [Column("DESCRIPTION", TypeName = "varchar(500)")]
-        public string
-#if nullable
-        ?
-#endif
-            Description { get; set; }
-
-        [Required]
-        [Column("LICENSE", TypeName = "varchar(max)")]
-        public string License { get; set; }
-
-        [Required]
-        [Column("VERSION", TypeName = "varchar(20)")]
-        public string Version { get; set; }
-        
-        [Column("ADDED_WHO", TypeName = "varchar(50)")]
-        public string
-#if nullable
-        ?
-#endif
-            AddedWho { get; set; }
-
-        [Column("ADDED_WHEN", TypeName = "datetime")]
-        public DateTime? AddedWhen { get; set; }
-
-        [Column("CHANGED_WHO", TypeName = "varchar(50)")]
-        public string
-#if nullable
-        ?
-#endif
-            ChangedWho { get; set; }
-
-        [Column("CHANGED_WHEN", TypeName = "datetime")]
-        public DateTime? ChangedWhen { get; set; }
-    }
-}

EnvelopeGenerator.Domain/Interfaces/IEnvelope.cs

@@ -11,5 +11,10 @@
         {
             return envelope.EnvelopeTypeId == 2;
         }
+
+        public static bool IsReadAndSign(this IEnvelope envelope)
+        {
+            return envelope.EnvelopeTypeId != 2;
+        }
     }
 }

EnvelopeGenerator.Domain/Resources/Model.Designer.cs

@@ -1,10 +1,10 @@
 //------------------------------------------------------------------------------
 // <auto-generated>
-//     Dieser Code wurde von einem Tool generiert.
-//     Laufzeitversion:4.0.30319.42000
+//     This code was generated by a tool.
+//     Runtime Version:4.0.30319.42000
 //
-//     Änderungen an dieser Datei können falsches Verhalten verursachen und gehen verloren, wenn
-//     der Code erneut generiert wird.
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
 // </auto-generated>
 //------------------------------------------------------------------------------
 
@@ -13,12 +13,12 @@ namespace My.Resources {
     
     
     /// <summary>
-    ///   Eine stark typisierte Ressourcenklasse zum Suchen von lokalisierten Zeichenfolgen usw.
+    ///   A strongly-typed resource class, for looking up localized strings, etc.
     /// </summary>
-    // Diese Klasse wurde von der StronglyTypedResourceBuilder automatisch generiert
-    // -Klasse über ein Tool wie ResGen oder Visual Studio automatisch generiert.
-    // Um einen Member hinzuzufügen oder zu entfernen, bearbeiten Sie die .ResX-Datei und führen dann ResGen
-    // mit der /str-Option erneut aus, oder Sie erstellen Ihr VS-Projekt neu.
+    // This class was auto-generated by the StronglyTypedResourceBuilder
+    // class via a tool like ResGen or Visual Studio.
+    // To add or remove a member, edit your .ResX file then rerun ResGen
+    // with the /str option, or rebuild your VS project.
     [global::System.CodeDom.Compiler.GeneratedCodeAttribute("System.Resources.Tools.StronglyTypedResourceBuilder", "17.0.0.0")]
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
     [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
@@ -33,7 +33,7 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Gibt die zwischengespeicherte ResourceManager-Instanz zurück, die von dieser Klasse verwendet wird.
+        ///   Returns the cached ResourceManager instance used by this class.
         /// </summary>
         [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
         public static global::System.Resources.ResourceManager ResourceManager {
@@ -47,8 +47,8 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Überschreibt die CurrentUICulture-Eigenschaft des aktuellen Threads für alle
-        ///   Ressourcenzuordnungen, die diese stark typisierte Ressourcenklasse verwenden.
+        ///   Overrides the current thread's CurrentUICulture property for all
+        ///   resource lookups using this strongly typed resource class.
         /// </summary>
         [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
         public static global::System.Globalization.CultureInfo Culture {
@@ -61,7 +61,7 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Zugriffscode korrekt eingegeben ähnelt.
+        ///   Looks up a localized string similar to Zugriffscode korrekt eingegeben.
         /// </summary>
         public static string AccessCodeCorrect {
             get {
@@ -70,7 +70,7 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Zugriffscode falsch eingegeben ähnelt.
+        ///   Looks up a localized string similar to Zugriffscode falsch eingegeben.
         /// </summary>
         public static string AccessCodeIncorrect {
             get {
@@ -79,7 +79,7 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Zugriffscode angefordert ähnelt.
+        ///   Looks up a localized string similar to Zugriffscode angefordert.
         /// </summary>
         public static string AccessCodeRequested {
             get {
@@ -88,7 +88,7 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Fortgeschrittene Elektronische Signatur ähnelt.
+        ///   Looks up a localized string similar to Fortgeschrittene Elektronische Signatur.
         /// </summary>
         public static string AdvancedElectronicSignature {
             get {
@@ -97,7 +97,7 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Abgeschlossen ähnelt.
+        ///   Looks up a localized string similar to Abgeschlossen.
         /// </summary>
         public static string Completed {
             get {
@@ -106,7 +106,16 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Vollständig Signiert ähnelt.
+        ///   Looks up a localized string similar to Vollständig bestätigt.
+        /// </summary>
+        public static string CompletelyConfirmed {
+            get {
+                return ResourceManager.GetString("CompletelyConfirmed", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Vollständig signiert.
         /// </summary>
         public static string CompletelySigned {
             get {
@@ -115,7 +124,25 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Vertrag ähnelt.
+        ///   Looks up a localized string similar to Lesebestätigung.
+        /// </summary>
+        public static string Confirmation {
+            get {
+                return ResourceManager.GetString("Confirmation", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Gelesen und bestätigt.
+        /// </summary>
+        public static string Confirmed {
+            get {
+                return ResourceManager.GetString("Confirmed", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Vertrag.
         /// </summary>
         public static string Contract {
             get {
@@ -124,7 +151,7 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Erstellt ähnelt.
+        ///   Looks up a localized string similar to Erstellt.
         /// </summary>
         public static string Created {
             get {
@@ -133,7 +160,16 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Dokument Rotation geändert ähnelt.
+        ///   Looks up a localized string similar to Dokument gelesen und bestätigt.
+        /// </summary>
+        public static string DocumentConfirmed {
+            get {
+                return ResourceManager.GetString("DocumentConfirmed", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Dokument Rotation geändert.
         /// </summary>
         public static string DocumentMod_Rotation {
             get {
@@ -142,7 +178,7 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Dokument geöffnet ähnelt.
+        ///   Looks up a localized string similar to Dokument geöffnet.
         /// </summary>
         public static string DocumentOpened {
             get {
@@ -151,7 +187,7 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Unterzeichnung abgelehnt ähnelt.
+        ///   Looks up a localized string similar to Unterzeichnung abgelehnt.
         /// </summary>
         public static string DocumentRejected {
             get {
@@ -160,7 +196,16 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Dokument unterzeichnet ähnelt.
+        ///   Looks up a localized string similar to Lesebestätigung abgelehnt.
+        /// </summary>
+        public static string DocumentRejectedRaC {
+            get {
+                return ResourceManager.GetString("DocumentRejectedRaC", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Dokument unterzeichnet.
         /// </summary>
         public static string DocumentSigned {
             get {
@@ -169,7 +214,7 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Entwurf ähnelt.
+        ///   Looks up a localized string similar to Entwurf.
         /// </summary>
         public static string Draft {
             get {
@@ -178,7 +223,7 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Archiviert ähnelt.
+        ///   Looks up a localized string similar to Archiviert.
         /// </summary>
         public static string EnvelopeArchived {
             get {
@@ -187,7 +232,16 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Vollständig signiert ähnelt.
+        ///   Looks up a localized string similar to Vollständig gelesen und bestätigt.
+        /// </summary>
+        public static string EnvelopeCompletelyConfirmed {
+            get {
+                return ResourceManager.GetString("EnvelopeCompletelyConfirmed", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Vollständig signiert.
         /// </summary>
         public static string EnvelopeCompletelySigned {
             get {
@@ -196,7 +250,7 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Umschlag Erstellt ähnelt.
+        ///   Looks up a localized string similar to Umschlag Erstellt.
         /// </summary>
         public static string EnvelopeCreated {
             get {
@@ -205,7 +259,7 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Umschlag Gelöscht ähnelt.
+        ///   Looks up a localized string similar to Umschlag Gelöscht.
         /// </summary>
         public static string EnvelopeDeleted {
             get {
@@ -214,7 +268,16 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Teil-Signiert ähnelt.
+        ///   Looks up a localized string similar to Teil-Bestätigt.
+        /// </summary>
+        public static string EnvelopePartlyConfirmed {
+            get {
+                return ResourceManager.GetString("EnvelopePartlyConfirmed", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Teil-Signiert.
         /// </summary>
         public static string EnvelopePartlySigned {
             get {
@@ -223,7 +286,7 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Umschlag in Queue ähnelt.
+        ///   Looks up a localized string similar to Umschlag in Queue.
         /// </summary>
         public static string EnvelopeQueued {
             get {
@@ -232,7 +295,7 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Umschlag abgelehnt ähnelt.
+        ///   Looks up a localized string similar to Umschlag abgelehnt.
         /// </summary>
         public static string EnvelopeRejected {
             get {
@@ -241,7 +304,7 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Signierungszertifikat erstellt ähnelt.
+        ///   Looks up a localized string similar to Signierungszertifikat erstellt.
         /// </summary>
         public static string EnvelopeReportCreated {
             get {
@@ -250,7 +313,16 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Gespeichert ähnelt.
+        ///   Looks up a localized string similar to Lesebestätigungszertifikat erstellt.
+        /// </summary>
+        public static string EnvelopeReportCreatedRaC {
+            get {
+                return ResourceManager.GetString("EnvelopeReportCreatedRaC", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Gespeichert.
         /// </summary>
         public static string EnvelopeSaved {
             get {
@@ -259,7 +331,7 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Gesendet ähnelt.
+        ///   Looks up a localized string similar to Gesendet.
         /// </summary>
         public static string EnvelopeSent {
             get {
@@ -268,7 +340,7 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Umschlag zurückgezogen ähnelt.
+        ///   Looks up a localized string similar to Umschlag zurückgezogen.
         /// </summary>
         public static string EnvelopeWithdrawn {
             get {
@@ -277,7 +349,7 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Zugriffscode versendet ähnelt.
+        ///   Looks up a localized string similar to Zugriffscode versendet.
         /// </summary>
         public static string MessageAccessCodeSent {
             get {
@@ -286,7 +358,7 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Abschlussemail versendet ähnelt.
+        ///   Looks up a localized string similar to Abschlussemail versendet.
         /// </summary>
         public static string MessageCompletionSent {
             get {
@@ -295,7 +367,7 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Signaturbestätigung versendet ähnelt.
+        ///   Looks up a localized string similar to Abschlussbestätigung versendet.
         /// </summary>
         public static string MessageConfirmationSent {
             get {
@@ -304,7 +376,7 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Löschinformation versendet ähnelt.
+        ///   Looks up a localized string similar to Löschinformation versendet.
         /// </summary>
         public static string MessageDeletionSent {
             get {
@@ -313,7 +385,7 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Dokumentenlink versendet ähnelt.
+        ///   Looks up a localized string similar to Dokumentenlink versendet.
         /// </summary>
         public static string MessageInvitationSent {
             get {
@@ -322,7 +394,7 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Nein ähnelt.
+        ///   Looks up a localized string similar to Nein.
         /// </summary>
         public static string No {
             get {
@@ -331,7 +403,16 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Teil-Signiert ähnelt.
+        ///   Looks up a localized string similar to Teil-Bestätigt.
+        /// </summary>
+        public static string PartlyConfirmed {
+            get {
+                return ResourceManager.GetString("PartlyConfirmed", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Teil-Signiert.
         /// </summary>
         public static string PartlySigned {
             get {
@@ -340,7 +421,7 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Qualifizierte Signatur ähnelt.
+        ///   Looks up a localized string similar to Qualifizierte Signatur.
         /// </summary>
         public static string QualifiedSignature {
             get {
@@ -349,7 +430,7 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Arbeitsanweisung ähnelt.
+        ///   Looks up a localized string similar to Lesebestätigung.
         /// </summary>
         public static string ReadAndSign {
             get {
@@ -358,7 +439,7 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Wollen Sie die 2-Faktor Definition für diesen Empfänger zurücksetzen. Der Empfänger muss sich dann neu identifizieren! ähnelt.
+        ///   Looks up a localized string similar to Wollen Sie die 2-Faktor Definition für diesen Empfänger zurücksetzen. Der Empfänger muss sich dann neu identifizieren!.
         /// </summary>
         public static string ResetTOTPUser {
             get {
@@ -367,7 +448,7 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Gespeichert ähnelt.
+        ///   Looks up a localized string similar to Gespeichert.
         /// </summary>
         public static string Saved {
             get {
@@ -376,7 +457,7 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Gesendet ähnelt.
+        ///   Looks up a localized string similar to Gesendet.
         /// </summary>
         public static string Sent {
             get {
@@ -385,7 +466,7 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Signatur ähnelt.
+        ///   Looks up a localized string similar to Signatur.
         /// </summary>
         public static string Signature {
             get {
@@ -394,7 +475,7 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Signatur bestätigt ähnelt.
+        ///   Looks up a localized string similar to Abschluss bestätigt.
         /// </summary>
         public static string SignatureConfirmed {
             get {
@@ -403,7 +484,7 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Signiert ähnelt.
+        ///   Looks up a localized string similar to Signiert.
         /// </summary>
         public static string Signed {
             get {
@@ -412,7 +493,7 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Erfolgreich! Dialog wird geschlossen. ähnelt.
+        ///   Looks up a localized string similar to Erfolgreich! Dialog wird geschlossen..
         /// </summary>
         public static string Success_FormClose {
             get {
@@ -421,7 +502,16 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Unsigniert ähnelt.
+        ///   Looks up a localized string similar to Unbestätigt.
+        /// </summary>
+        public static string Unconfirmed {
+            get {
+                return ResourceManager.GetString("Unconfirmed", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Unsigniert.
         /// </summary>
         public static string Unsigned {
             get {
@@ -430,7 +520,7 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Ja ähnelt.
+        ///   Looks up a localized string similar to Ja.
         /// </summary>
         public static string Yes {
             get {
@@ -439,7 +529,7 @@ namespace My.Resources {
         }
         
         /// <summary>
-        ///   Sucht eine lokalisierte Zeichenfolge, die Ja, mit Anhang ähnelt.
+        ///   Looks up a localized string similar to Ja, mit Anhang.
         /// </summary>
         public static string YesWithAttachment {
             get {

EnvelopeGenerator.Domain/Resources/Model.en.resx

@@ -132,15 +132,27 @@
   <data name="Completed" xml:space="preserve">
     <value>Completed</value>
   </data>
+  <data name="CompletelyConfirmed" xml:space="preserve">
+    <value>Completely confirmed</value>
+  </data>
   <data name="CompletelySigned" xml:space="preserve">
     <value>Completely signed</value>
   </data>
+  <data name="Confirmation" xml:space="preserve">
+    <value>Read Confirmation</value>
+  </data>
+  <data name="Confirmed" xml:space="preserve">
+    <value>Read and signed</value>
+  </data>
   <data name="Contract" xml:space="preserve">
     <value>Contract</value>
   </data>
   <data name="Created" xml:space="preserve">
     <value>Created</value>
   </data>
+  <data name="DocumentConfirmed" xml:space="preserve">
+    <value>Document read and signed</value>
+  </data>
   <data name="DocumentMod_Rotation" xml:space="preserve">
     <value>Document rotation adapted</value>
   </data>
@@ -150,6 +162,9 @@
   <data name="DocumentRejected" xml:space="preserve">
     <value>Signing rejected</value>
   </data>
+  <data name="DocumentRejectedRaC" xml:space="preserve">
+    <value>Read confirmation rejected</value>
+  </data>
   <data name="DocumentSigned" xml:space="preserve">
     <value>Document signed</value>
   </data>
@@ -159,6 +174,9 @@
   <data name="EnvelopeArchived" xml:space="preserve">
     <value>Archived</value>
   </data>
+  <data name="EnvelopeCompletelyConfirmed" xml:space="preserve">
+    <value>Completely confirmed</value>
+  </data>
   <data name="EnvelopeCompletelySigned" xml:space="preserve">
     <value>Completely signed</value>
   </data>
@@ -168,8 +186,11 @@
   <data name="EnvelopeDeleted" xml:space="preserve">
     <value>Envelope Deleted</value>
   </data>
+  <data name="EnvelopePartlyConfirmed" xml:space="preserve">
+    <value>Partially confirmed</value>
+  </data>
   <data name="EnvelopePartlySigned" xml:space="preserve">
-    <value>Partly signed</value>
+    <value>Partially signed</value>
   </data>
   <data name="EnvelopeQueued" xml:space="preserve">
     <value>Envelope Queued</value>
@@ -180,6 +201,9 @@
   <data name="EnvelopeReportCreated" xml:space="preserve">
     <value>Signature certificate created</value>
   </data>
+  <data name="EnvelopeReportCreatedRaC" xml:space="preserve">
+    <value>Read confirmartion certificate created</value>
+  </data>
   <data name="EnvelopeSaved" xml:space="preserve">
     <value>Saved</value>
   </data>
@@ -196,7 +220,7 @@
     <value>Final email sent</value>
   </data>
   <data name="MessageConfirmationSent" xml:space="preserve">
-    <value>Confirmation Sent</value>
+    <value>Finalization Confirmation Sent</value>
   </data>
   <data name="MessageDeletionSent" xml:space="preserve">
     <value>Deletion Notice Sent</value>
@@ -207,6 +231,12 @@
   <data name="No" xml:space="preserve">
     <value>No</value>
   </data>
+  <data name="PartlyConfirmed" xml:space="preserve">
+    <value>Partially confirmed</value>
+  </data>
+  <data name="PartlySigned" xml:space="preserve">
+    <value>Partially signed</value>
+  </data>
   <data name="QualifiedSignature" xml:space="preserve">
     <value>Qualified Signature</value>
   </data>
@@ -226,7 +256,7 @@
     <value>Signature</value>
   </data>
   <data name="SignatureConfirmed" xml:space="preserve">
-    <value>Signature confirmed</value>
+    <value>Finalization confirmed</value>
   </data>
   <data name="Signed" xml:space="preserve">
     <value>Signed</value>
@@ -234,6 +264,9 @@
   <data name="Success_FormClose" xml:space="preserve">
     <value>Successful! Dialog is closed.successful! Dialog is closed.</value>
   </data>
+  <data name="Unconfirmed" xml:space="preserve">
+    <value>Unconfirmed</value>
+  </data>
   <data name="Unsigned" xml:space="preserve">
     <value>Unsigned</value>
   </data>

EnvelopeGenerator.Domain/Resources/Model.resx

@@ -132,8 +132,17 @@
   <data name="Completed" xml:space="preserve">
     <value>Abgeschlossen</value>
   </data>
+  <data name="CompletelyConfirmed" xml:space="preserve">
+    <value>Vollständig bestätigt</value>
+  </data>
   <data name="CompletelySigned" xml:space="preserve">
-    <value>Vollständig Signiert</value>
+    <value>Vollständig signiert</value>
+  </data>
+  <data name="Confirmation" xml:space="preserve">
+    <value>Lesebestätigung</value>
+  </data>
+  <data name="Confirmed" xml:space="preserve">
+    <value>Gelesen und bestätigt</value>
   </data>
   <data name="Contract" xml:space="preserve">
     <value>Vertrag</value>
@@ -141,6 +150,9 @@
   <data name="Created" xml:space="preserve">
     <value>Erstellt</value>
   </data>
+  <data name="DocumentConfirmed" xml:space="preserve">
+    <value>Dokument gelesen und bestätigt</value>
+  </data>
   <data name="DocumentMod_Rotation" xml:space="preserve">
     <value>Dokument Rotation geändert</value>
   </data>
@@ -150,6 +162,9 @@
   <data name="DocumentRejected" xml:space="preserve">
     <value>Unterzeichnung abgelehnt</value>
   </data>
+  <data name="DocumentRejectedRaC" xml:space="preserve">
+    <value>Lesebestätigung abgelehnt</value>
+  </data>
   <data name="DocumentSigned" xml:space="preserve">
     <value>Dokument unterzeichnet</value>
   </data>
@@ -159,6 +174,9 @@
   <data name="EnvelopeArchived" xml:space="preserve">
     <value>Archiviert</value>
   </data>
+  <data name="EnvelopeCompletelyConfirmed" xml:space="preserve">
+    <value>Vollständig gelesen und bestätigt</value>
+  </data>
   <data name="EnvelopeCompletelySigned" xml:space="preserve">
     <value>Vollständig signiert</value>
   </data>
@@ -168,6 +186,9 @@
   <data name="EnvelopeDeleted" xml:space="preserve">
     <value>Umschlag Gelöscht</value>
   </data>
+  <data name="EnvelopePartlyConfirmed" xml:space="preserve">
+    <value>Teil-Bestätigt</value>
+  </data>
   <data name="EnvelopePartlySigned" xml:space="preserve">
     <value>Teil-Signiert</value>
   </data>
@@ -180,6 +201,9 @@
   <data name="EnvelopeReportCreated" xml:space="preserve">
     <value>Signierungszertifikat erstellt</value>
   </data>
+  <data name="EnvelopeReportCreatedRaC" xml:space="preserve">
+    <value>Lesebestätigungszertifikat erstellt</value>
+  </data>
   <data name="EnvelopeSaved" xml:space="preserve">
     <value>Gespeichert</value>
   </data>
@@ -196,7 +220,7 @@
     <value>Abschlussemail versendet</value>
   </data>
   <data name="MessageConfirmationSent" xml:space="preserve">
-    <value>Signaturbestätigung versendet</value>
+    <value>Abschlussbestätigung versendet</value>
   </data>
   <data name="MessageDeletionSent" xml:space="preserve">
     <value>Löschinformation versendet</value>
@@ -207,6 +231,9 @@
   <data name="No" xml:space="preserve">
     <value>Nein</value>
   </data>
+  <data name="PartlyConfirmed" xml:space="preserve">
+    <value>Teil-Bestätigt</value>
+  </data>
   <data name="PartlySigned" xml:space="preserve">
     <value>Teil-Signiert</value>
   </data>
@@ -214,7 +241,7 @@
     <value>Qualifizierte Signatur</value>
   </data>
   <data name="ReadAndSign" xml:space="preserve">
-    <value>Arbeitsanweisung</value>
+    <value>Lesebestätigung</value>
   </data>
   <data name="ResetTOTPUser" xml:space="preserve">
     <value>Wollen Sie die 2-Faktor Definition für diesen Empfänger zurücksetzen. Der Empfänger muss sich dann neu identifizieren!</value>
@@ -229,7 +256,7 @@
     <value>Signatur</value>
   </data>
   <data name="SignatureConfirmed" xml:space="preserve">
-    <value>Signatur bestätigt</value>
+    <value>Abschluss bestätigt</value>
   </data>
   <data name="Signed" xml:space="preserve">
     <value>Signiert</value>
@@ -237,6 +264,9 @@
   <data name="Success_FormClose" xml:space="preserve">
     <value>Erfolgreich! Dialog wird geschlossen.</value>
   </data>
+  <data name="Unconfirmed" xml:space="preserve">
+    <value>Unbestätigt</value>
+  </data>
   <data name="Unsigned" xml:space="preserve">
     <value>Unsigniert</value>
   </data>

EnvelopeGenerator.Infrastructure/EGDbContext.cs

@@ -47,6 +47,8 @@ public abstract class EGDbContextBase : DbContext
 
     public DbSet<Signature> DocumentReceiverElements { get; set; }
 
+    public DbSet<ElementAnnotation> DocumentReceiverElementAnnotations { get; set; }
+
     public DbSet<DocumentStatus> DocumentStatus { get; set; }
 
     public DbSet<EmailTemplate> EmailTemplate { get; set; }
@@ -79,10 +81,6 @@ public abstract class EGDbContextBase : DbContext
 
     public DbSet<ClientUser> ClientUsers { get; set; }
 
-    public DbSet<EnvelopeReport> EnvelopeReports { get; set; }
-
-    public DbSet<ThirdPartyModule> ThirdPartyModules { get; set; }
-
     private readonly DbTriggerParams _triggers;
 
     private readonly ILogger
@@ -204,10 +202,6 @@ public abstract class EGDbContextBase : DbContext
             .HasForeignKey(annot => annot.ElementId);
         #endregion
 
-        #region EnvelopeReport
-        modelBuilder.Entity<EnvelopeReport>().HasNoKey();
-        #endregion
-
         #region Trigger
         // Configure entities to handle database triggers
         void AddTrigger<T>() where T : class => _triggers

EnvelopeGenerator.PdfEditor/Pdf.cs

@@ -105,17 +105,13 @@ namespace EnvelopeGenerator.PdfEditor
         public Pdf<TInputStream, TOutputStream> Background<TSignature>(IEnumerable<TSignature> signatures, double widthPx = 1.9500000000000002, double heightPx = 2.52)
             where TSignature : ISignature
         {
-            // once per page
-            Page(page =>
-            {
-                var canvas = new PdfCanvas(page);
-                canvas.ConcatMatrix(1, 0, 0, -1, 0, page.GetPageSize().GetHeight());
-            });
-
             foreach (var signature in signatures)
                 Page(signature.Page, page =>
                 {
                     var canvas = new PdfCanvas(page);
+                    canvas.SaveState();
+                    canvas.ConcatMatrix(1, 0, 0, -1, 0, page.GetPageSize().GetHeight());
+
                     double inchFactor = 72;
                     double magin = .2;
                     double x = (signature.X - .7 - magin) * inchFactor;
@@ -134,6 +130,8 @@ namespace EnvelopeGenerator.PdfEditor
                     canvas.SetFillColor(new DeviceRgb(204, 202, 198))
                         .Rectangle(x, y + height - bottomLineLength, width, bottomLineLength)
                         .Fill();
+
+                    canvas.RestoreState();
                 });
 
             return this;

EnvelopeGenerator.ReceiverUI/App.razor

@@ -0,0 +1,10 @@
+<Router AppAssembly="@typeof(Program).Assembly">
+    <Found Context="routeData">
+        <RouteView RouteData="@routeData" DefaultLayout="@typeof(MainLayout)" />
+    </Found>
+    <NotFound>
+        <LayoutView Layout="@typeof(MainLayout)">
+            <p>Sorry, there's nothing at this address.</p>
+        </LayoutView>
+    </NotFound>
+</Router>

EnvelopeGenerator.ReceiverUI/Data/Adjustment.cs

@@ -0,0 +1,44 @@
+namespace EnvelopeGenerator.ReceiverUI.Data {
+    public class Adjustment
+    {
+        public static Adjustment CreateBalanceForward(DateTime dt, int random)
+        {
+            var rnd = new DeterministicRandom(random);
+            Adjustment res = new Adjustment();
+            res.currentDateTime = dt;
+            res.currentDescription = "Balance Forward";
+            res.currentAmount = rnd.Random(10, 300) * 10;
+            return res;
+        }
+        public static Adjustment CreatePayment(DateTime dt, int random)
+        {
+            var rnd = new DeterministicRandom(random);
+            Adjustment res = new Adjustment();
+            res.currentDateTime = dt;
+            res.currentDescription = "Payment";
+            res.currentAmount = -rnd.Random(1, 40) * 10;
+            return res;
+        }
+        public static Adjustment CreateCharge(DateTime dt, int random)
+        {
+            var rnd = new DeterministicRandom(random);
+            Adjustment res = new Adjustment();
+            res.currentDateTime = dt;
+            res.currentDescription = rnd.GetRandomItem(bills);
+            res.currentAmount = rnd.Random(10, 50) * 10;
+            return res;
+        }
+
+        DateTime currentDateTime;
+        string currentDescription = "";
+        double currentAmount = 0;
+        static readonly string[] bills = new string[] { "Bill - Insurance", "Bill - Electricity", "Bill - Rent", "Bill - Phone", "Bill - Office Supplies" };
+        public DateTime Date { get { return currentDateTime; } }
+        public string Description { get { return currentDescription; } }
+        public double Amount { get { return currentAmount; } }
+
+        public Adjustment()
+        {
+        }
+    }
+}

EnvelopeGenerator.ReceiverUI/Data/Customer.cs

@@ -0,0 +1,64 @@
+using DevExpress.DataAccess.Sql;
+using DevExpress.DataAccess.Sql.DataApi;
+
+namespace EnvelopeGenerator.ReceiverUI.Data {
+    public class Customer {
+        static List<Customer> currentCustomers = new List<Customer>();
+
+        public static List<Customer> Customers { get { return currentCustomers; } }
+        static Customer() {
+            try {
+                SqlDataSource ds = new SqlDataSource("NWindConnectionString");
+                SelectQuery query = SelectQueryFluentBuilder
+                    .AddTable("Customers")
+                    .SelectAllColumns()
+                    .Build("Customers");
+                ds.Queries.Add(query);
+                ds.RebuildResultSchema();
+                ds.Fill();
+                ITable src = ds.Result["Customers"];
+                foreach(var row in src) {
+                    currentCustomers.Add(new Customer() {
+                        CustomerID = row.GetValue<string>("CustomerID"),
+                        Address = row.GetValue<string>("Address"),
+                        CompanyName = row.GetValue<string>("CompanyName"),
+                        ContactName = row.GetValue<string>("ContactName"),
+                        ContactTitle = row.GetValue<string>("ContactTitle"),
+                        Country = row.GetValue<string>("Country"),
+                        City = row.GetValue<string>("City"),
+                        Fax = row.GetValue<string>("Fax"),
+                        Phone = row.GetValue<string>("Phone"),
+                        PostalCode = row.GetValue<string>("PostalCode"),
+                        Region = row.GetValue<string>("Region")
+                    });
+                }
+            } catch {
+                currentCustomers.Add(new Customer() { 
+                    Address = "Obere Str. 57",
+                    City = "Berlin",
+                    CompanyName = "Alfreds Futterkiste",
+                    ContactName = "Maria Anders",
+                    ContactTitle = "Sales Representative",
+                    Country = "Germany",
+                    CustomerID = "ALFKI",
+                    Fax = "030-0076545",
+                    Phone = "030-0074321",
+                    PostalCode = "12209"
+                });
+            }
+        }
+
+        public string CustomerID { get; set; }
+        public string CompanyName { get; set; }
+        public string ContactName { get; set; }
+        public string ContactTitle { get; set; }
+        public string Address { get; set; }
+        public string City { get; set; }
+        public string PostalCode { get; set; }
+        public string Region { get; set; }
+        public string Country { get; set; }
+        public string Phone { get; set; }
+        public string Fax { get; set; }
+
+    }
+}

EnvelopeGenerator.ReceiverUI/Data/DataItem.cs

@@ -0,0 +1,71 @@
+namespace EnvelopeGenerator.ReceiverUI.Data {
+    public class DataItem {
+        static readonly string[] accountType = new string[] { "Energy", "Manufacturing", "Estate", "Food", "Services" };
+        public string CustomerID { get; set; }
+        public string CompanyName { get; set; }
+        public string ContactName { get; set; }
+        public string ContactTitle { get; set; }
+        public string Address { get; set; }
+        public string City { get; set; }
+        public string PostalCode { get; set; }
+        public string Region { get; set; }
+        public string Country { get; set; }
+        public string Phone { get; set; }
+        public string Fax { get; set; }
+        public string Email { get; set; }
+        public string Invoice { get; set; }
+        public string CustomerAccount { get; set; }
+        public string CustomerIdentifiers { get; set; }
+        public DateTime BillingDate { get; set; }
+        public DateTime BillingPeriodStart { get; set; }
+        public DateTime BillingPeriodEnd { get; set; }
+        public string Terms { get; set; }
+        public string TermsID { get; set; }
+        public Adjustment[] Adjustments { get; set; }
+
+        public DataItem(int i) {
+            var rnd = new DeterministicRandom(i);
+            Customer c = rnd.GetRandomItem(Customer.Customers);
+            CustomerID = c.CustomerID;
+            CompanyName = c.CompanyName;
+            ContactName = c.ContactName;
+            ContactTitle = c.ContactTitle;
+            Address = c.Address;
+            City = c.City;
+            PostalCode = c.PostalCode;
+            Region = c.Region;
+            Country = c.Country;
+            Phone = c.Phone;
+            Fax = c.Fax;
+            Email = ContactName.Split(' ')[0].Replace(' ', '.').ToLower() + "@" + CompanyName.Split(' ')[0].ToLower() + ".com";
+            Invoice = string.Format("{0}{1}-{2}", rnd.RandomChar, rnd.Random(100, 1000), rnd.Random(100, 1000));
+            CustomerAccount = rnd.GetRandomItem(accountType);
+            CustomerIdentifiers = string.Format("{0}-{1}", rnd.Random(1000, 10000), rnd.Random(10, 100));
+            BillingPeriodStart = rnd.RandomTime();
+            BillingPeriodEnd = rnd.RandomTime(BillingPeriodStart, 7 * 24, 30 * 24);
+            BillingDate = rnd.RandomTime(BillingPeriodEnd, 7 * 24, 30 * 24);
+            Term currentTerm = rnd.GetRandomItem(Term.Terms);
+            Terms = currentTerm.Name;
+
+            int adjustmentsCount = rnd.Random(6) + 4;
+            Adjustments = new Adjustment[adjustmentsCount];
+            int h = (int)((BillingPeriodEnd - BillingPeriodStart).TotalHours / adjustmentsCount);
+
+            Adjustments[0] = Adjustment.CreateBalanceForward(rnd.RandomTime(BillingPeriodStart, 0, h), rnd.Random(10000));
+
+            int[] items = rnd.RandomList(adjustmentsCount - 1, 2);
+
+            for(int j = 1; j < Adjustments.Length; j++) {
+                DateTime nextDate = rnd.RandomTime(BillingPeriodStart.AddHours(h * j), 0, h);
+                    switch(items[j - 1]) {
+                        case 0:
+                            Adjustments[j] = Adjustment.CreateCharge(nextDate, rnd.Random(10000));
+                            break;
+                        case 1:
+                            Adjustments[j] = Adjustment.CreatePayment(nextDate, rnd.Random(10000));
+                            break;
+                    }
+            }
+        }
+    }
+}

EnvelopeGenerator.ReceiverUI/Data/DataItemList.cs

@@ -0,0 +1,70 @@
+using System.Collections;
+
+namespace EnvelopeGenerator.ReceiverUI.Data {
+    public class DataItemList : IList<DataItem>, IList {
+        readonly int rowCount;
+
+        public DataItem this[int index] { get { return new DataItem(index); } set { } }
+        public int Count { get { return rowCount; } }
+        public bool IsReadOnly { get { return false; } }
+        public bool IsFixedSize { get { return false; } }
+        public object SyncRoot { get { return true; } }
+        public bool IsSynchronized { get { return true; } }
+        object IList.this[int index] { get { return new DataItem(index); } set { } }
+
+        public DataItemList(int rowCount) {
+            this.rowCount = rowCount;
+        }
+        public IEnumerator<DataItem> GetEnumerator() {
+            throw new NotImplementedException();
+        }
+        public int Add(object value) {
+            throw new NotImplementedException();
+        }
+        public bool Contains(object value) {
+            throw new NotImplementedException();
+        }
+        public void Clear() {
+            throw new NotImplementedException();
+        }
+        public int IndexOf(object value) {
+            throw new NotImplementedException();
+        }
+        public void Insert(int index, object value) {
+            throw new NotImplementedException();
+        }
+        public void Remove(object value) {
+            throw new NotImplementedException();
+        }
+        public void RemoveAt(int index) {
+            throw new NotImplementedException();
+        }
+        public void CopyTo(Array array, int index) {
+            throw new NotImplementedException();
+        }
+        IEnumerator IEnumerable.GetEnumerator() {
+            throw new NotImplementedException();
+        }
+        public int IndexOf(DataItem item) {
+            throw new NotImplementedException();
+        }
+        public void Insert(int index, DataItem item) {
+            throw new NotImplementedException();
+        }
+        public void Add(DataItem item) {
+            throw new NotImplementedException();
+        }
+        public bool Contains(DataItem item) {
+            throw new NotImplementedException();
+        }
+        public void CopyTo(DataItem[] array, int arrayIndex) {
+            throw new NotImplementedException();
+        }
+        public bool Remove(DataItem item) {
+            throw new NotImplementedException();
+        }
+        void ICollection<DataItem>.CopyTo(DataItem[] array, int arrayIndex) {
+            CopyTo(array, arrayIndex);
+        }
+    }
+}

EnvelopeGenerator.ReceiverUI/Data/DeterministicRandom.cs

@@ -0,0 +1,60 @@
+namespace EnvelopeGenerator.ReceiverUI.Data {
+    class DeterministicRandom {
+        const int randomCount = 10000;
+        static readonly int[] deterministicRandomNumbers;
+        static readonly DateTime time;
+        int rnd;
+        int Next {
+            get {
+                rnd = deterministicRandomNumbers[rnd % randomCount];
+                return rnd;
+            }
+        }
+        public char RandomChar {
+            get {
+                return (char)((int)'A' + Random(0, 26));
+            }
+        }
+        public int[] RandomList(int count, int to) {
+            int[] res = new int[count];
+            for(int i = 0; i < Math.Min(count, to); i++)
+                res[i] = i;
+            for(int i = to; i < count; i++)
+                res[i] = Random(to);
+
+            for(int i = 0; i < count; i++) {
+                int ind = Random(count);
+                int temp = res[ind];
+                res[ind] = res[i];
+                res[i] = temp;
+            }
+            return res;
+        }
+        public int Random(int to) {
+            return Random(0, to);
+        }
+        public int Random(int from, int to) {
+            return Next % Math.Max(1, to - from) + from;
+        }
+        public T GetRandomItem<T>(IList<T> list) {
+            return list[Next % list.Count];
+        }
+        public DateTime RandomTime() {
+            return RandomTime(time, 0, 30 * 24);
+        }
+        public DateTime RandomTime(DateTime from, int fromHours, int toHours) {
+            return from.AddHours(Next % (toHours - fromHours) + fromHours);
+        }
+
+        static DeterministicRandom() {
+            time = DateTime.Now.AddDays(-62);
+            Random currentRandom = new Random(randomCount);
+            deterministicRandomNumbers = new int[randomCount];
+            for(int i = 0; i < randomCount; i++)
+                deterministicRandomNumbers[i] = currentRandom.Next(randomCount);
+        }
+        public DeterministicRandom(int i) {
+            this.rnd = i + (i >> 10) + (i >> 20);
+        }
+    }
+}

EnvelopeGenerator.ReceiverUI/Data/Term.cs

@@ -0,0 +1,15 @@
+namespace EnvelopeGenerator.ReceiverUI.Data {
+    public struct Term {
+        public static readonly Term[] Terms = new Term[] {
+            new Term("Payment seven days after invoice date" ),
+            new Term("Payment ten days after invoice date" ),
+            new Term("End of month" ),
+            new Term("21st of the month following invoice date" ),
+        };
+        readonly string currentName;
+        public string Name { get { return currentName; } }
+        public Term(string currentName) {
+            this.currentName = currentName;
+        }
+    }
+}

EnvelopeGenerator.ReceiverUI/EnvelopeGenerator.ReceiverUI.csproj

@@ -0,0 +1,51 @@
+<Project Sdk="Microsoft.NET.Sdk.BlazorWebAssembly">
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <WasmBuildNative>true</WasmBuildNative>
+	<InvariantGlobalization>false</InvariantGlobalization>
+	<BlazorWebAssemblyLoadAllGlobalizationData>true</BlazorWebAssemblyLoadAllGlobalizationData>
+	  
+	<Nullable>enable</Nullable>
+	<PackageId>EnvelopeGenerator.ReceiverUI</PackageId>
+	<Authors>Digital Data GmbH</Authors>
+	<Company>Digital Data GmbH</Company>
+	<Product>EnvelopeGenerator.ReceiverUI</Product>
+	<PackageIcon>Assets\icon.ico</PackageIcon>
+	<PackageTags>digital data envelope generator web</PackageTags>
+	<Description>EnvelopeGenerator.ReceiverUI is a Blazor WebAssembly application developed to manage signing processes. It uses Entity Framework Core (EF Core) for database operations. The user interface for signing processes is developed with Razor View Engine (.cshtml files) and JavaScript under wwwroot, integrated with PSPDFKit. This integration allows users to view and sign documents seamlessly.</Description>
+	<Version>1.4.1</Version>
+	<!-- NuGet package version -->
+	<AssemblyVersion>1.4.1.0</AssemblyVersion>
+	<!-- Assembly version for API compatibility -->
+	<FileVersion>1.4.1.0</FileVersion>
+	<!-- Windows file version -->
+	<Copyright>Copyright © 2026 Digital Data GmbH. All rights reserved.</Copyright>
+	  
+  </PropertyGroup>
+  <ItemGroup>
+    <PackageReference Include="DevExpress.Blazor.PdfViewer" Version="25.2.3" />
+    <PackageReference Include="DevExpress.Blazor.Reporting.JSBasedControls" Version="25.2.3" />
+    <PackageReference Include="DevExpress.Blazor.Reporting.Viewer" Version="25.2.3" />
+    <PackageReference Include="DevExpress.Drawing.Skia" Version="25.2.3" />
+    <PackageReference Include="HarfBuzzSharp.NativeAssets.WebAssembly" Version="8.3.1.2" />
+    <PackageReference Include="SkiaSharp.NativeAssets.WebAssembly" Version="3.119.1" />
+    <PackageReference Include="SkiaSharp.Views.Blazor" Version="3.119.1" />
+    <NativeFileReference Include="$(HarfBuzzSharpStaticLibraryPath)\2.0.23\*.a" />
+  </ItemGroup>
+  <ItemGroup>
+    <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly" Version="8.0.11" />
+    <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly.DevServer" Version="8.0.11" PrivateAssets="all" />
+  </ItemGroup>
+  <ItemGroup>
+    <Folder Include="Properties\PublishProfiles\" />
+  </ItemGroup>
+  <ItemGroup>
+    <Content Update="wwwroot\docs\privacy-policy.en-US.html">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </Content>
+    <Content Update="wwwroot\docs\privacy-policy.fr-FR.html">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </Content>
+  </ItemGroup>
+</Project>

EnvelopeGenerator.ReceiverUI/Models/AnnotationDto.cs

@@ -0,0 +1,32 @@
+namespace EnvelopeGenerator.ReceiverUI.Models;
+
+/// <summary>
+/// Represents a pre-assigned signature annotation position on a specific page.
+/// <br/><br/>
+/// <b>Coordinate unit (X, Y):</b> Inches (GdPicture14 native unit),
+/// origin at the <b>top-left</b> corner of the page, both axes increase downward/rightward.
+/// <br/><br/>
+/// <b>Conversion to DevExpress:</b> Multiply by 100 (DX uses 1/100 inch).
+/// Convert: <c>xDX = xInches * 100.0</c>
+/// <br/>
+/// <b>Conversion to PDF Points:</b> Multiply by 72 (1 inch = 72 points).
+/// Convert: <c>xPt = xInches * 72.0</c>
+/// <br/>
+/// <b>Y-axis for PDF (bottom-left origin):</b> Flip required for iText7.
+/// Convert: <c>yPt = (pageHeightInches - yInches - elemHeightInches) * 72.0</c>
+/// </summary>
+[Obsolete("Use SignatureDto with SignatureService.")]
+public record AnnotationDto
+{
+    /// <summary>Unique identifier of the annotation.</summary>
+    public long Id { get; init; }
+
+    /// <summary>1-based page number within the document.</summary>
+    public int Page { get; init; }
+
+    /// <summary>Horizontal position in INCHES from the left edge of the page.</summary>
+    public double X { get; init; }
+
+    /// <summary>Vertical position in INCHES from the top edge of the page.</summary>
+    public double Y { get; init; }
+}

EnvelopeGenerator.ReceiverUI/Models/Constants/SenderAppType.cs

@@ -0,0 +1,8 @@
+namespace EnvelopeGenerator.ReceiverUI.Models.Constants
+{
+    public enum SenderAppType
+    {
+        LegacyFormApp = 0,
+        ReceiverUIBlazorApp = 1
+    }
+}

EnvelopeGenerator.ReceiverUI/Models/Constants/UnitOfLength.cs

@@ -0,0 +1,65 @@
+namespace EnvelopeGenerator.ReceiverUI.Models.Constants;
+
+/// <summary>
+/// Represents the unit of measurement for coordinate values in signature positioning.
+/// Used for converting coordinates between different systems (GdPicture14, PDF.js, iText7).
+/// </summary>
+public enum UnitOfLength
+{
+    /// <summary>
+    /// Inch unit (1 inch = 25.4 mm).
+    /// This is the native unit used by GdPicture14 (EnvelopeGenerator.Form - Legacy VB.NET app).
+    /// Database stores all coordinates (X, Y, Width, Height) in INCHES.
+    /// </summary>
+    /// <remarks>
+    /// <b>Source:</b> GdPicture14.Annotations.AnnotationStickyNote uses INCHES natively.
+    /// <br/>
+    /// <b>Evidence:</b> VB.NET code directly assigns database values to annotation properties without conversion:
+    /// <code>
+    /// oAnnotation.Left = CSng(pElement.X)   ' Direct assignment → INCHES
+    /// oAnnotation.Top = CSng(pElement.Y)
+    /// </code>
+    /// <b>Standard Page Dimensions:</b>
+    /// <list type="bullet">
+    ///   <item>A4: 8.27" × 11.69" (210mm × 297mm)</item>
+    ///   <item>Letter: 8.5" × 11"</item>
+    /// </list>
+    /// </remarks>
+    Inch = 0,
+
+    /// <summary>
+    /// PDF Point unit (1 point = 1/72 inch).
+    /// This is the standard unit used by PDF specification and PDF.js viewer.
+    /// </summary>
+    /// <remarks>
+    /// <b>Definition:</b> According to PDF specification and Microsoft documentation:
+    /// <br/>
+    /// <i>"PDF pages are sized in point units. 1 pt == 1/72 inch"</i>
+    /// <br/><br/>
+    /// <b>Conversion Formula:</b>
+    /// <code>
+    /// points = inches * 72.0
+    /// inches = points / 72.0
+    /// </code>
+    /// <b>Important:</b> Point ≠ Pixel!
+    /// <list type="bullet">
+    ///   <item><b>Point (pt):</b> Device-independent unit (always 1/72 inch)</item>
+    ///   <item><b>Pixel (px):</b> Device-dependent unit (varies with screen DPI)</item>
+    ///   <item>At 72 DPI: 1 point = 1 pixel (coincidence)</item>
+    ///   <item>At 96 DPI: 1 point ≈ 1.33 pixels</item>
+    ///   <item>At 300 DPI: 1 point ≈ 4.17 pixels</item>
+    /// </list>
+    /// <b>Standard Page Dimensions (in points):</b>
+    /// <list type="bullet">
+    ///   <item>A4: 595 × 842 points (8.27" × 11.69" × 72)</item>
+    ///   <item>Letter: 612 × 792 points (8.5" × 11" × 72)</item>
+    /// </list>
+    /// <b>Usage in EnvelopeGenerator:</b>
+    /// <list type="bullet">
+    ///   <item>PDF.js viewer expects coordinates in points</item>
+    ///   <item>iText7 library uses points for PDF manipulation</item>
+    ///   <item>PSPDFKit (Web) uses points for annotation placement</item>
+    /// </list>
+    /// </remarks>
+    Point
+}

EnvelopeGenerator.ReceiverUI/Models/EnvelopeReceiverDto.cs

@@ -0,0 +1,106 @@
+namespace EnvelopeGenerator.ReceiverUI.Models;
+
+/// <summary>
+/// Client-side model for the envelope receiver returned by
+/// <c>GET api/EnvelopeReceiver/{envelopeKey}</c>.
+/// </summary>
+public record EnvelopeReceiverDto
+{
+    public int EnvelopeId { get; init; }
+    public int ReceiverId { get; init; }
+    public int Sequence { get; init; }
+
+    public string? Name { get; init; }
+    public string? JobTitle { get; init; }
+    public string? CompanyName { get; init; }
+    public string? PrivateMessage { get; init; }
+
+    public DateTime AddedWhen { get; init; }
+    public DateTime? ChangedWhen { get; init; }
+    public bool HasPhoneNumber { get; init; }
+
+    public EnvelopeClientDto? Envelope { get; init; }
+    public ReceiverClientDto? Receiver { get; init; }
+}
+
+/// <summary>
+/// Client-side model for the envelope data embedded in <see cref="EnvelopeReceiverDto"/>.
+/// </summary>
+public record EnvelopeClientDto
+{
+    public int Id { get; init; }
+    public int UserId { get; init; }
+    public int Status { get; init; }
+    public string StatusName { get; init; } = string.Empty;
+    public string Uuid { get; init; } = string.Empty;
+    public string Title { get; init; } = string.Empty;
+    public string Message { get; init; } = string.Empty;
+    public DateTime AddedWhen { get; init; }
+    public DateTime? ChangedWhen { get; init; }
+    public string Language { get; init; } = "de-DE";
+    public int? EnvelopeTypeId { get; init; }
+    public string? EnvelopeTypeTitle { get; init; }
+    public int? ContractType { get; init; }
+    public int? CertificationType { get; init; }
+    public bool UseAccessCode { get; init; }
+    public bool TFAEnabled { get; init; }
+    public IEnumerable<DocumentClientDto>? Documents { get; init; }
+    public EnvelopeSenderDto? User { get; init; }
+}
+
+/// <summary>
+/// Sender (user) information embedded in <see cref="EnvelopeClientDto"/>.
+/// </summary>
+public record EnvelopeSenderDto
+{
+    public int Id { get; init; }
+    public string? Username { get; init; }
+    public string? FullName { get; init; }
+    public string? Email { get; init; }
+}
+
+/// <summary>
+/// Client-side model for a document embedded in <see cref="EnvelopeClientDto"/>.
+/// </summary>
+public record DocumentClientDto
+{
+    public int Id { get; init; }
+    public int EnvelopeId { get; init; }
+    public DateTime AddedWhen { get; init; }
+    public IEnumerable<SignatureClientDto>? Elements { get; init; }
+}
+
+/// <summary>
+/// Client-side model for a signature/annotation element embedded in <see cref="DocumentClientDto"/>.
+/// </summary>
+public record SignatureClientDto
+{
+    public int Id { get; init; }
+    public int DocumentId { get; init; }
+    public int ReceiverId { get; init; }
+    public int ElementType { get; init; }
+    public double X { get; init; }
+    public double Y { get; init; }
+    public double Width { get; init; }
+    public double Height { get; init; }
+    public int Page { get; init; }
+    public bool Required { get; init; }
+    public string? Tooltip { get; init; }
+    public bool ReadOnly { get; init; }
+    public int AnnotationIndex { get; init; }
+    public DateTime AddedWhen { get; init; }
+    public DateTime? ChangedWhen { get; init; }
+}
+
+/// <summary>
+/// Client-side model for the receiver data embedded in <see cref="EnvelopeReceiverDto"/>.
+/// </summary>
+public record ReceiverClientDto
+{
+    public int Id { get; init; }
+    public string? EmailAddress { get; init; }
+    public string? Signature { get; init; }
+    public DateTime AddedWhen { get; init; }
+    public DateTime? TfaRegDeadline { get; init; }
+}
+

EnvelopeGenerator.ReceiverUI/Models/SignatureCaptureDto.cs

@@ -0,0 +1,62 @@
+namespace EnvelopeGenerator.ReceiverUI.Models;
+
+/// <summary>
+/// Represents a captured signature with metadata created by the receiver in the signature popup.
+/// This model holds the signature image (as base64 data URL) along with signer information
+/// used for rendering applied signatures on the PDF canvas.
+/// </summary>
+/// <remarks>
+/// <b>Used in:</b> EnvelopeViewer.razor signature popup workflow
+/// <br/>
+/// <b>Creation:</b> User draws/types/uploads signature and fills required fields
+/// <br/>
+/// <b>Storage:</b> Session-only (Blazor component state, lost on page refresh)
+/// <br/>
+/// <b>Rendering:</b> Applied signatures display: Image + Separator + Name/Position/Place/Date
+/// </remarks>
+public sealed record SignatureCaptureDto
+{
+    /// <summary>
+    /// Base64-encoded data URL of the signature image.
+    /// <br/>
+    /// <b>Format:</b> <c>data:image/png;base64,iVBORw0KG...</c>
+    /// <br/>
+    /// <b>Source:</b> Canvas.toDataURL() from signature pad (draw/text/image tabs)
+    /// <br/>
+    /// <b>Usage:</b> Set as <c>img.src</c> in applied signature overlay
+    /// </summary>
+    public required string DataUrl { get; init; }
+
+    /// <summary>
+    /// Full name of the signer (first and last name).
+    /// <br/>
+    /// <b>Required:</b> Yes (validated in popup)
+    /// <br/>
+    /// <b>Display:</b> Bold text in applied signature block
+    /// <br/>
+    /// <b>Example:</b> "Max Mustermann"
+    /// </summary>
+    public required string FullName { get; init; }
+
+    /// <summary>
+    /// Job title or position of the signer.
+    /// <br/>
+    /// <b>Required:</b> No (optional field)
+    /// <br/>
+    /// <b>Display:</b> Normal weight text between name and place/date
+    /// <br/>
+    /// <b>Example:</b> "Geschäftsführer" or empty string
+    /// </summary>
+    public string Position { get; init; } = string.Empty;
+
+    /// <summary>
+    /// Location/place where the signature was created.
+    /// <br/>
+    /// <b>Required:</b> Yes (validated in popup)
+    /// <br/>
+    /// <b>Display:</b> Shown with current date in German format (dd.MM.yyyy)
+    /// <br/>
+    /// <b>Example:</b> "Berlin" ? rendered as "Berlin, 26.01.2025"
+    /// </summary>
+    public required string Place { get; init; }
+}

EnvelopeGenerator.ReceiverUI/Models/SignatureDto.cs

@@ -0,0 +1,101 @@
+using EnvelopeGenerator.ReceiverUI.Models.Constants;
+
+namespace EnvelopeGenerator.ReceiverUI.Models;
+
+/// <summary>
+/// Represents a signature position on a PDF page.
+/// Coordinates stored in INCHES (GdPicture14 native unit).
+/// Origin: Top-left corner, X increases right, Y increases down.
+/// </summary>
+public class SignatureDto
+{
+    /// <summary>Unique identifier.</summary>
+    public int Id { get; init; }
+
+    private double _x;
+    private double _y;
+
+    /// <summary>Horizontal position in INCHES from left edge.</summary>
+    public double X 
+    { 
+        get => _x * Factor;
+        init => _x = value; 
+    }
+
+    /// <summary>Vertical position in INCHES from top edge.</summary>
+    public double Y 
+    { 
+        get => _y * Factor;
+        init => _y = value; 
+    }
+
+    /// <summary>1-based page number.</summary>
+    public int Page { get; init; }
+
+    /// <summary>Sender application type that created this signature.</summary>
+    public SenderAppType SenderAppType { get; init; }
+
+    private UnitOfLength _unitOfLength;
+
+    public SignatureDto Convert(UnitOfLength unitOfLength)
+    {
+        _unitOfLength = unitOfLength;
+        return this;
+    }
+
+    public double Factor
+    {
+        get
+        {
+            if (SenderAppType != SenderAppType.LegacyFormApp)
+            {
+                throw new NotImplementedException(
+                    $"SenderAppType '{SenderAppType}' is not yet implemented. " +
+                    $"Currently, only '{nameof(SenderAppType.LegacyFormApp)}' is supported. " +
+                    $"Future implementations will handle '{nameof(SenderAppType.ReceiverUIBlazorApp)}' and other types.");
+            }
+
+            // LegacyFormApp uses GdPicture14 with INCHES
+            return _unitOfLength switch
+            {
+                UnitOfLength.Inch => 1.0,   // No conversion needed: INCHES → INCHES
+                UnitOfLength.Point => 72.0, // INCHES → PDF Points: 1 inch = 72 points (PDF standard, NOT pixels!)
+                _ => throw new InvalidOperationException(
+                    $"Unknown UnitOfLength: {_unitOfLength}. Expected '{nameof(UnitOfLength.Inch)}' or '{nameof(UnitOfLength.Point)}'.")
+            };
+        }
+    }
+}
+
+public static class SignatureDtoExtensions
+{
+    /// <summary>
+    /// Converts all signatures in the collection to the specified unit of length.
+    /// </summary>
+    /// <typeparam name="T">Type of the collection (IEnumerable, List, etc.)</typeparam>
+    /// <param name="signatures">Collection of SignatureDto objects to convert.</param>
+    /// <param name="unitOfLength">Target unit of measurement (Inch or Point).</param>
+    /// <returns>The same collection with all signatures converted to the specified unit.</returns>
+    /// <exception cref="ArgumentNullException">Thrown when signatures collection is null.</exception>
+    /// <remarks>
+    /// <b>Usage:</b>
+    /// <code>
+    /// var signatures = await SignatureService.GetAsync(envelopeKey);
+    /// var convertedSignatures = signatures.ConvertAll(UnitOfLength.Point);
+    /// </code>
+    /// <b>Note:</b> This method modifies each SignatureDto object in place and returns the same collection.
+    /// </remarks>
+    public static T Convert<T>(this T signatures, UnitOfLength unitOfLength) 
+        where T : IEnumerable<SignatureDto>
+    {
+        if (signatures == null)
+            throw new ArgumentNullException(nameof(signatures));
+
+        foreach (var signature in signatures)
+        {
+            signature.Convert(unitOfLength);
+        }
+
+        return signatures;
+    }
+}

EnvelopeGenerator.ReceiverUI/NOTICE.txt

@@ -0,0 +1,12 @@
+The following open source libraries are used and included within thеse sample/demonstration projects:
+
+Bootstrap (Open Source – MIT License)
+Copyright (c) 2011-2021 Twitter, Inc. / Copyright (c) 2011-2021 The Bootstrap Authors
+https://github.com/twbs/bootstrap/blob/main/LICENSE
+
+open-iconic (Open Source – MIT License and SIL Open Font License)
+Copyright (c) 2014 Waybury
+https://github.com/iconic/open-iconic/blob/master/ICON-LICENSE
+https://github.com/iconic/open-iconic/blob/master/FONT-LICENSE
+
+The open source libraries included in these sample/demonstration projects are done so pursuant to each individual open source library license and subject to the disclaimers and limitations on liability set forth in each open source library license.

EnvelopeGenerator.ReceiverUI/Options/ApiOptions.cs

@@ -0,0 +1,10 @@
+namespace EnvelopeGenerator.ReceiverUI.Options;
+
+public class ApiOptions
+{
+    public const string SectionName = "Api";
+
+    public string BaseUrl { get; set; } = string.Empty;
+
+    public bool ForceToUseFakeDocument { get; set; } = false;
+}

EnvelopeGenerator.ReceiverUI/Options/PdfViewerOptions.cs

@@ -0,0 +1,71 @@
+namespace EnvelopeGenerator.ReceiverUI.Options;
+
+public class PdfViewerOptions
+{
+    public const string SectionName = "PdfViewer";
+
+    /// <summary>
+    /// Base scale for thumbnail rendering (0.2 - 1.5 recommended)
+    /// Higher values = better quality but slower rendering
+    /// Default: 0.75
+    /// </summary>
+    public double ThumbnailBaseScale { get; set; } = 0.75;
+
+    /// <summary>
+    /// Enable HiDPI/Retina support for thumbnails
+    /// Default: true
+    /// </summary>
+    public bool ThumbnailEnableHiDPI { get; set; } = true;
+
+    /// <summary>
+    /// Maximum device pixel ratio multiplier for thumbnails (1.0 - 3.0)
+    /// Caps DPR to avoid excessive memory usage on 4K+ displays
+    /// Default: 2.0
+    /// </summary>
+    public double ThumbnailMaxDPR { get; set; } = 2.0;
+
+    /// <summary>
+    /// Enable HiDPI/Retina support for main PDF canvas
+    /// Default: true
+    /// </summary>
+    public bool MainCanvasEnableHiDPI { get; set; } = true;
+
+    /// <summary>
+    /// Maximum device pixel ratio multiplier for main canvas (1.0 - 3.0)
+    /// Default: 2.0
+    /// </summary>
+    public double MainCanvasMaxDPR { get; set; } = 2.0;
+
+    /// <summary>
+    /// Enable smooth zoom transition (fade effect)
+    /// Default: true
+    /// </summary>
+    public bool EnableSmoothZoom { get; set; } = true;
+
+    /// <summary>
+    /// Zoom transition duration in milliseconds (50 - 500)
+    /// Default: 150
+    /// </summary>
+    public int ZoomTransitionDuration { get; set; } = 150;
+
+    /// <summary>
+    /// Opacity during rendering (0.0 - 1.0)
+    /// Lower values = more visible fade effect
+    /// Default: 0.85
+    /// </summary>
+    public double RenderingOpacity { get; set; } = 0.85;
+
+    /// <summary>
+    /// Delay between thumbnail renders in milliseconds (10 - 200)
+    /// Higher values = less browser stress, slower initial load
+    /// Default: 50
+    /// </summary>
+    public int ThumbnailRenderDelay { get; set; } = 50;
+
+    /// <summary>
+    /// Zoom step percentage (1 - 50)
+    /// Controls how much zoom changes per click or scroll
+    /// Default: 5 (5% per step)
+    /// </summary>
+    public int ZoomStepPercentage { get; set; } = 5;
+}

EnvelopeGenerator.ReceiverUI/Pages/DocumentViewer.razor

@@ -0,0 +1,5 @@
+@page "/documentviewer"
+
+<DxDocumentViewer ReportName="LargeDatasetReport" CssClass="dx-blazor-reporting-container" Height="@null" Width="@null">
+    <DxDocumentViewerTabPanelSettings Width="340" />
+</DxDocumentViewer>

EnvelopeGenerator.ReceiverUI/Pages/EnvelopeViewer.razor

@@ -0,0 +1,968 @@
+@page "/envelope/{EnvelopeKey}"
+@using EnvelopeGenerator.ReceiverUI.Models
+@using EnvelopeGenerator.ReceiverUI.Models.Constants
+@using EnvelopeGenerator.ReceiverUI.Services
+@using Microsoft.Extensions.Options
+@using EnvelopeGenerator.ReceiverUI.Options
+@using Microsoft.JSInterop
+@using DevExpress.Blazor
+@inject DocumentService DocumentService
+@inject NavigationManager Navigation
+@inject IOptions<ApiOptions> AppOptions
+@inject IOptions<PdfViewerOptions> PdfViewerOptions
+@inject IJSRuntime JSRuntime
+@inject SignatureService SignatureService
+@inject EnvelopeGenerator.ReceiverUI.Services.AuthService AuthService
+@inject EnvelopeGenerator.ReceiverUI.Services.EnvelopeReceiverService EnvelopeReceiverService
+@inject AppVersionService AppVersion
+@implements IAsyncDisposable
+
+<link href="_content/DevExpress.Blazor.Themes/blazing-berry.bs5.min.css" rel="stylesheet" />
+<link href="@AppVersion.GetVersionedUrl("css/envelope-viewer.css")" rel="stylesheet" />
+<link href="https://cdnjs.cloudflare.com/ajax/libs/pdf.js/3.11.174/pdf_viewer.min.css" rel="stylesheet" />
+<script src="https://cdnjs.cloudflare.com/ajax/libs/pdf.js/3.11.174/pdf.min.js"></script>
+<script src="@AppVersion.GetVersionedUrl("js/pdf-viewer.js")"></script>
+<script src="@AppVersion.GetVersionedUrl("js/receiver-signature.js")"></script>
+
+<div class="envelope-viewer-layout">
+<div class="envelope-action-bar">
+    <div class="envelope-action-bar__inner" style="flex-direction: column; align-items: stretch; padding: 0.35rem 1.5rem; gap: 0.35rem;">
+        @* Row 1: Title + Sender + Badges + Logout *@
+        <div style="display: flex; align-items: center; justify-content: space-between; gap: 1rem;">
+            @* Left: Title + Sender *@
+            <div style="flex: 0 1 auto; min-width: 0; display: flex; align-items: center; gap: 0.75rem;">
+                @if (_envelopeReceiver is not null) {
+                    <div style="font-size: 0.9rem; font-weight: 600; color: #1f2937; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;">
+                        @(_envelopeReceiver.Envelope?.Title ?? "Dokument")
+                    </div>
+                    @if (!string.IsNullOrWhiteSpace(_envelopeReceiver.Envelope?.User?.FullName) || !string.IsNullOrWhiteSpace(_envelopeReceiver.Envelope?.User?.Email)) {
+                        <span style="font-size: 0.7rem; color: #6b7280; white-space: nowrap;">
+                            Von 
+                            @if (!string.IsNullOrWhiteSpace(_envelopeReceiver.Envelope?.User?.FullName)) {
+                                <span style="font-weight: 500; color: #374151;">@_envelopeReceiver.Envelope.User.FullName</span>
+                            }
+                            @if (!string.IsNullOrWhiteSpace(_envelopeReceiver.Envelope?.User?.Email)) {
+                                <span>&lt;@_envelopeReceiver.Envelope.User.Email&gt;</span>
+                            }
+                            @if (_envelopeReceiver.Envelope?.AddedWhen != null) {
+                                <span>&nbsp;·&nbsp;@_envelopeReceiver.Envelope.AddedWhen.ToString("dd.MM.yyyy")</span>
+                            }
+                        </span>
+                    }
+                } else {
+                    <div style="font-size: 0.9rem; font-weight: 600; color: #1f2937;">Dokumentenansicht</div>
+                }
+            </div>
+
+            @* Right: Badges + Logout *@
+            <div class="d-flex align-items-center" style="gap: 0.75rem; flex: 0 0 auto;">
+            @if (_envelopeReceiver is not null) {
+                <div class="d-flex flex-wrap align-items-center" style="gap: 0.3rem; font-size: 0.7rem;">
+                    @if (!string.IsNullOrWhiteSpace(_envelopeReceiver.Name)) {
+                        <span style="display: inline-flex; align-items: center; padding: 0.125rem 0.4rem; background: #f3f4f6; border-radius: 0.25rem; color: #374151; white-space: nowrap;">
+                            <svg xmlns="http://www.w3.org/2000/svg" width="9" height="9" fill="currentColor" class="me-1" viewBox="0 0 16 16">
+                                <path d="M8 8a3 3 0 1 0 0-6 3 3 0 0 0 0 6Zm2-3a2 2 0 1 1-4 0 2 2 0 0 1 4 0Zm4 8c0 1-1 1-1 1H3s-1 0-1-1 1-4 6-4 6 3 6 4Z"/>
+                            </svg>
+                            @_envelopeReceiver.Name
+                        </span>
+                    }
+                    @if (!string.IsNullOrWhiteSpace(_envelopeReceiver.Envelope?.User?.FullName)) {
+                        <span style="display: inline-flex; align-items-center; padding: 0.15rem 0.5rem; background: #f3f4f6; border-radius: 0.25rem; color: #6b7280; white-space: nowrap;">
+                            Von @_envelopeReceiver.Envelope.User.FullName
+                        </span>
+                    }
+                    @{
+                        int sigCount = _signatures.Count;
+                    }
+                    @if (sigCount > 0) {
+                        <span style="display: inline-flex; align-items: center; padding: 0.125rem 0.4rem; background: #ede9fe; border-radius: 0.25rem; color: #6d28d9; font-weight: 500; white-space: nowrap;">
+                            <svg xmlns="http://www.w3.org/2000/svg" width="9" height="9" fill="currentColor" class="me-1" viewBox="0 0 16 16">
+                                <path d="M12.146.146a.5.5 0 0 1 .708 0l3 3a.5.5 0 0 1 0 .708l-10 10a.5.5 0 0 1-.168.11l-5 2a.5.5 0 0 1-.65-.65l2-5a.5.5 0 0 1 .11-.168l10-10zM11.207 2.5 13.5 4.793 14.793 3.5 12.5 1.207 11.207 2.5zm1.586 3L10.5 3.207 4 9.707V10h.5a.5.5 0 0 1 .5.5v.5h.5a.5.5 0 0 1 .5.5v.5h.293l6.5-6.5zm-9.761 5.175-.106.106-1.528 3.821 3.821-1.528.106-.106A.5.5 0 0 1 5 12.5V12h-.5a.5.5 0 0 1-.5-.5V11h-.5a.5.5 0 0 1-.468-.325z"/>
+                            </svg>
+                            @sigCount
+                        </span>
+                    }
+                    @if (_envelopeReceiver.Envelope?.UseAccessCode == true) {
+                        <span style="display: inline-flex; align-items: center; padding: 0.125rem 0.4rem; background: #fef3c7; border-radius: 0.25rem; color: #92400e; font-weight: 500; white-space: nowrap;">
+                            <svg xmlns="http://www.w3.org/2000/svg" width="9" height="9" fill="currentColor" class="me-1" viewBox="0 0 16 16">
+                                <path d="M8 1a2 2 0 0 1 2 2v4H6V3a2 2 0 0 1 2-2zm3 6V3a3 3 0 0 0-6 0v4a2 2 0 0 0-2 2v5a2 2 0 0 0 2 2h6a2 2 0 0 0 2-2V9a2 2 0 0 0-2-2z"/>
+                            </svg>
+                            Code
+                        </span>
+                    }
+                    @if (_envelopeReceiver.Envelope?.TFAEnabled == true) {
+                        <span style="display: inline-flex; align-items: center; padding: 0.125rem 0.4rem; background: #dbeafe; border-radius: 0.25rem; color: #1e40af; font-weight: 500; white-space: nowrap;">
+                            <svg xmlns="http://www.w3.org/2000/svg" width="9" height="9" fill="currentColor" class="me-1" viewBox="0 0 16 16">
+                                <path d="M5.338 1.59a61.44 61.44 0 0 0-2.837.856.481.481 0 0 0-.328.39c-.554 4.157.726 7.19 2.253 9.188a10.725 10.725 0 0 0 2.287 2.233c.346.244.652.42.893.533.12.057.218.095.293.118a.55.55 0 0 0 .101.025.615.615 0 0 0 .1-.025c.076-.023.174-.061.294-.118.24-.113.547-.29.893-.533a10.726 10.726 0 0 0 2.287-2.233c1.527-1.997 2.807-5.031 2.253-9.188a.48.48 0 0 0-.328-.39c-.651-.213-1.75-.56-2.837-.855C9.552 1.29 8.531 1.067 8 1.067c-.53 0-1.552.223-2.662.524zM5.072.56C6.157.265 7.31 0 8 0s1.843.265 2.928.56c1.11.3 2.229.655 2.887.87a1.54 1.54 0 0 1 1.044 1.262c.596 4.477-.787 7.795-2.465 9.99a11.775 11.775 0 0 1-2.517 2.453 7.159 7.159 0 0 1-1.048.625c-.28.132-.581.24-.829.24s-.548-.108-.829-.24a7.158 7.158 0 0 1-1.048-.625 11.777 11.777 0 0 1-2.517-2.453C1.928 10.487.545 7.169 1.141 2.692A1.54 1.54 0 0 1 2.185 1.43 62.456 62.456 0 0 1 5.072.56z"/>
+                                <path d="M10.854 5.146a.5.5 0 0 1 0 .708l-3 3a.5.5 0 0 1-.708 0l-1.5-1.5a.5.5 0 1 1 .708-.708L7.5 7.793l2.646-2.647a.5.5 0 0 1 .708 0z"/>
+                            </svg>
+                            2FA
+                        </span>
+                    }
+                </div>
+
+            }
+
+                @* Logout button *@
+                @if (!string.IsNullOrWhiteSpace(EnvelopeKey)) {
+                    <button class="pdf-toolbar__btn" @onclick="LogoutAsync" disabled="@_isLoggingOut" title="Abmelden" style="flex-shrink: 0;">
+                        @if (_isLoggingOut) {
+                            <span class="spinner-border spinner-border-sm" role="status" aria-hidden="true" style="width: 14px; height: 14px;"></span>
+                        } else {
+                            <svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" fill="currentColor" viewBox="0 0 16 16">
+                                <path fill-rule="evenodd" d="M10 12.5a.5.5 0 0 1-.5.5h-8a.5.5 0 0 1-.5-.5v-9a.5.5 0 0 1 .5-.5h8a.5.5 0 0 1 .5.5v2a.5.5 0 0 0 1 0v-2A1.5 1.5 0 0 0 9.5 2h-8A1.5 1.5 0 0 0 0 3.5v9A1.5 1.5 0 0 0 1.5 14h8a1.5 1.5 0 0 0 1.5-1.5v-2a.5.5 0 0 0-1 0v2z"/>
+                                <path fill-rule="evenodd" d="M15.854 8.354a.5.5 0 0 0 0-.708l-3-3a.5.5 0 0 0-.708.708L14.293 7.5H5.5a.5.5 0 0 0 0 1h8.793l-2.147 2.146a.5.5 0 0 0 .708.708l3-3z"/>
+                            </svg>
+                        }
+                    </button>
+                }
+            </div>
+        </div>
+
+        @* Row 2: Messages (visible text) *@
+        @if (_envelopeReceiver is not null && (!string.IsNullOrWhiteSpace(_envelopeReceiver.Envelope?.Message) || !string.IsNullOrWhiteSpace(_envelopeReceiver.PrivateMessage))) {
+            <div style="display: flex; align-items: flex-start; gap: 0.5rem; font-size: 0.7rem; padding-top: 0.15rem; border-top: 1px solid #e5e7eb;">
+                @if (!string.IsNullOrWhiteSpace(_envelopeReceiver.Envelope?.Message)) {
+                    <div style="flex: 1; min-width: 0; padding: 0.2rem 0.4rem; background: #f9fafb; border-radius: 0.25rem; border-left: 2px solid #9ca3af; display: flex; align-items: flex-start; gap: 0.25rem;">
+                        <span style="font-weight: 500; color: #374151; flex-shrink: 0;">📧</span>
+                        <span style="color: #6b7280; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;">@_envelopeReceiver.Envelope.Message</span>
+                    </div>
+                }
+                @if (!string.IsNullOrWhiteSpace(_envelopeReceiver.PrivateMessage)) {
+                    <div style="flex: 1; min-width: 0; padding: 0.2rem 0.4rem; background: #fef3c7; border-radius: 0.25rem; border-left: 2px solid #f59e0b; display: flex; align-items: flex-start; gap: 0.25rem;">
+                        <span style="font-weight: 500; color: #92400e; flex-shrink: 0;">🔒</span>
+                        <span style="color: #92400e; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;">@_envelopeReceiver.PrivateMessage</span>
+                    </div>
+                }
+            </div>
+        }
+    </div>
+</div>
+
+<div class="envelope-content">
+        @if (_isLoading) {
+            <div class="d-flex justify-content-center align-items-center h-100">
+                <div class="text-center">
+                    <div class="spinner-border text-white mb-3" style="width: 3.5rem; height: 3.5rem;" role="status">
+                        <span class="visually-hidden">L<>dt...</span>
+                    </div>
+                    <p class="text-white fw-semibold">Dokument wird geladen...</p>
+                </div>
+            </div>
+        } else if (_errorMessage is not null) {
+            <div class="error-container">
+                <div class="alert alert-danger shadow-lg">
+                    <div class="d-flex align-items-start">
+                        <svg xmlns="http://www.w3.org/2000/svg" width="28" height="28" fill="currentColor" class="me-3 flex-shrink-0" viewBox="0 0 16 16">
+                            <path d="M8 15A7 7 0 1 1 8 1a7 7 0 0 1 0 14zm0 1A8 8 0 1 0 8 0a8 8 0 0 0 0 16z"/>
+                            <path d="M7.002 11a1 1 0 1 1 2 0 1 1 0 0 1-2 0zM7.1 4.995a.905.905 0 1 1 1.8 0l-.35 3.507a.552.552 0 0 1-1.1 0L7.1 4.995z"/>
+                        </svg>
+                        <div>
+                            <h5 class="mb-2">Fehler beim Laden des Dokuments</h5>
+                            <p class="mb-0">@_errorMessage</p>
+                        </div>
+                    </div>
+                </div>
+            </div>
+        } else if (!string.IsNullOrWhiteSpace(_pdfDataUrl)) {
+            <div class="pdf-viewer-container">
+                @if (_pdfLoaded) {
+                    <div class="pdf-toolbar">
+                        <div class="pdf-toolbar__section">
+                            <button class="pdf-toolbar__btn pdf-toolbar__btn--toggle" @onclick="ToggleThumbnails" title="@(_showThumbnails ? "Seitenleiste ausblenden" : "Seitenleiste einblenden")">
+                                <svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" fill="currentColor" viewBox="0 0 16 16">
+                                    <path d="M1 2.5A1.5 1.5 0 0 1 2.5 1h3A1.5 1.5 0 0 1 7 2.5v3A1.5 1.5 0 0 1 5.5 7h-3A1.5 1.5 0 0 1 1 5.5v-3zm8 0A1.5 1.5 0 0 1 10.5 1h3A1.5 1.5 0 0 1 15 2.5v3A1.5 1.5 0 0 1 13.5 7h-3A1.5 1.5 0 0 1 9 5.5v-3zm-8 8A1.5 1.5 0 0 1 2.5 9h3A1.5 1.5 0 0 1 7 10.5v3A1.5 1.5 0 0 1 5.5 15h-3A1.5 1.5 0 0 1 1 13.5v-3zm8 0A1.5 1.5 0 0 1 10.5 9h3a1.5 1.5 0 0 1 1.5 1.5v3a1.5 1.5 0 0 1-1.5 1.5h-3A1.5 1.5 0 0 1 9 13.5v-3z"/>
+                                </svg>
+                            </button>
+                        </div>
+
+                        <div class="pdf-toolbar__divider"></div>
+
+                        <div class="pdf-toolbar__section">
+                            <button class="pdf-toolbar__btn" @onclick="PreviousPage" disabled="@(_currentPage <= 1)" title="Vorherige Seite">
+                                <svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" fill="currentColor" viewBox="0 0 16 16">
+                                    <path fill-rule="evenodd" d="M11.354 1.646a.5.5 0 0 1 0 .708L5.707 8l5.647 5.646a.5.5 0 0 1-.708.708l-6-6a.5.5 0 0 1 0-.708l6-6a.5.5 0 0 1 .708 0z"/>
+                                </svg>
+                            </button>
+                            <div class="pdf-toolbar__page-input-group">
+                                <input type="number" class="pdf-toolbar__page-input" min="1" max="@_totalPages" value="@_currentPage" @onchange="OnPageInputChanged" />
+                                <span class="pdf-toolbar__page-total">/ @_totalPages</span>
+                            </div>
+                            <button class="pdf-toolbar__btn" @onclick="NextPage" disabled="@(_currentPage >= _totalPages)" title="Nächste Seite">
+                                <svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" fill="currentColor" viewBox="0 0 16 16">
+                                    <path fill-rule="evenodd" d="M4.646 1.646a.5.5 0 0 1 .708 0l6 6a.5.5 0 0 1 0 .708l-6 6a.5.5 0 0 1-.708-.708L10.293 8 4.646 2.354a.5.5 0 0 1 0-.708z"/>
+                                </svg>
+                            </button>
+                        </div>
+
+                        <div class="pdf-toolbar__divider"></div>
+
+                        <div class="pdf-toolbar__section pdf-toolbar__zoom-section">
+                            <button class="pdf-toolbar__btn" @onclick="ZoomOut" disabled="@(_currentZoom <= 50)" title="Verkleinern">
+                                <svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" fill="currentColor" viewBox="0 0 16 16">
+                                    <path d="M11.742 10.344a6.5 6.5 0 1 0-1.397 1.398h-.001c.03.04.062.078.098.115l3.85 3.85a1 1 0 0 0 1.415-1.414l-3.85-3.85a1.007 1.007 0 0 0-.115-.1zM12 6.5a5.5 5.5 0 1 1-11 0 5.5 5.5 0 0 1 11 0zM4 6a.5.5 0 0 0 0 1h5a.5.5 0 0 0 0-1H4z"/>
+                                </svg>
+                            </button>
+                            <div class="pdf-toolbar__zoom-slider-container">
+                                <input type="range" class="pdf-toolbar__zoom-slider" min="50" max="300" step="@(PdfViewerOptions.Value.ZoomStepPercentage)" value="@_currentZoom" @oninput="OnZoomSliderChanged" title="@(_currentZoom)%" />
+                                <div class="pdf-toolbar__zoom-label">@(_currentZoom)%</div>
+                            </div>
+                            <button class="pdf-toolbar__btn" @onclick="ZoomIn" disabled="@(_currentZoom >= 300)" title="Vergrößern">
+                                <svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" fill="currentColor" viewBox="0 0 16 16">
+                                    <path d="M11.742 10.344a6.5 6.5 0 1 0-1.397 1.398h-.001c.03.04.062.078.098.115l3.85 3.85a1 1 0 0 0 1.415-1.414l-3.85-3.85a1.007 1.007 0 0 0-.115-.1zM12 6.5a5.5 5.5 0 1 1-11 0 5.5 5.5 0 0 1 11 0zM6.5 3a.5.5 0 0 0-1 0v2.5H3a.5.5 0 0 0 0 1h2.5V9a.5.5 0 0 0 1 0V6.5H9a.5.5 0 0 0 0-1H6.5V3z"/>
+                                </svg>
+                            </button>
+                        </div>
+
+                        <div class="pdf-toolbar__divider"></div>
+
+                        @if (_totalSignatures > 0) {
+                            <div class="pdf-toolbar__section pdf-toolbar__signature-nav">
+                                <button class="pdf-toolbar__btn pdf-toolbar__btn--signature-nav" 
+                                        @onclick="GoToPreviousSignature" 
+                                        disabled="@(_totalSignatures == 0)"
+                                        title="Vorherige Unterschrift">
+                                    <svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" fill="currentColor" viewBox="0 0 16 16">
+                                        <path fill-rule="evenodd" d="M11.354 1.646a.5.5 0 0 1 0 .708L5.707 8l5.647 5.646a.5.5 0 0 1-.708.708l-6-6a.5.5 0 0 1 0-.708l6-6a.5.5 0 0 1 .708 0z"/>
+                                    </svg>
+                                </button>
+                                
+                                <div class="pdf-toolbar__signature-counter">
+                                    <svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" fill="currentColor" class="me-1" viewBox="0 0 16 16">
+                                        <path d="M12.146.146a.5.5 0 0 1 .708 0l3 3a.5.5 0 0 1 0 .708l-10 10a.5.5 0 0 1-.168.11l-5 2a.5.5 0 0 1-.65-.65l2-5a.5.5 0 0 1 .11-.168l10-10zM11.207 2.5 13.5 4.793 14.793 3.5 12.5 1.207 11.207 2.5zm1.586 3L10.5 3.207 4 9.707V10h.5a.5.5 0 0 1 .5.5v.5h.5a.5.5 0 0 1 .5.5v.5h.293l6.5-6.5zm-9.761 5.175-.106.106-1.528 3.821 3.821-1.528.106-.106A.5.5 0 0 1 5 12.5V12h-.5a.5.5 0 0 1-.5-.5V11h-.5a.5.5 0 0 1-.468-.325z"/>
+                                    </svg>
+                                    <span class="pdf-toolbar__signature-counter-text">
+                                        @if (_currentSignatureIndex > 0) {
+                                            <span style="color: #4F46E5; font-weight: 600;">#@_currentSignatureIndex</span>
+                                            <span style="opacity: 0.4; margin: 0 0.35rem;">|</span>
+                                        }
+                                        <strong style="color: @(_unsignedSignatures > 0 ? "#4F46E5" : "#10b981");">@_signedSignatures</strong>
+                                        <span style="opacity: 0.6;">&nbsp;/&nbsp;</span>
+                                        <span>@_totalSignatures</span>
+                                    </span>
+                                    @if (_unsignedSignatures > 0) {
+                                        <span class="pdf-toolbar__signature-badge">@_unsignedSignatures offen</span>
+                                    } else {
+                                        <span class="pdf-toolbar__signature-badge pdf-toolbar__signature-badge--complete">✓ Komplett</span>
+                                    }
+                                </div>
+                                
+                                <button class="pdf-toolbar__btn pdf-toolbar__btn--signature-nav" 
+                                        @onclick="GoToNextSignature" 
+                                        disabled="@(_totalSignatures == 0)"
+                                        title="Nächste Unterschrift">
+                                    <svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" fill="currentColor" viewBox="0 0 16 16">
+                                        <path fill-rule="evenodd" d="M4.646 1.646a.5.5 0 0 1 .708 0l6 6a.5.5 0 0 1 0 .708l-6 6a.5.5 0 0 1-.708-.708L10.293 8 4.646 2.354a.5.5 0 0 1 0-.708z"/>
+                                    </svg>
+                                </button>
+                            </div>
+
+                            <div class="pdf-toolbar__divider"></div>
+
+                            @* Reset button - only show when signatures are signed *@
+                            @if (_signedSignatures > 0) {
+                                <div class="pdf-toolbar__section">
+                                    <button class="pdf-toolbar__btn pdf-toolbar__btn--reset" 
+                                            @onclick="RestartSigning" 
+                                            title="Unterschriften zurücksetzen">
+                                        <svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" fill="currentColor" viewBox="0 0 16 16">
+                                            <path fill-rule="evenodd" d="M8 3a5 5 0 1 0 4.546 2.914.5.5 0 0 1 .908-.417A6 6 0 1 1 8 2v1z"/>
+                                            <path d="M8 4.466V.534a.25.25 0 0 1 .41-.192l2.36 1.966c.12.1.12.284 0 .384L8.41 4.658A.25.25 0 0 1 8 4.466z"/>
+                                        </svg>
+                                    </button>
+                                </div>
+                            }
+                        }
+                    </div>
+                }
+                <div class="pdf-frame">
+                    @if (_pdfLoaded && _showThumbnails) {
+                        <!-- PDF Thumbnail Sidebar -->
+                        <div class="pdf-thumbnails" style="width: @(_thumbnailWidth)px">
+                            <div class="pdf-thumbnails__content">
+                                @for (int i = 1; i <= _totalPages; i++) {
+                                    var pageNum = i;
+                                    <div class="pdf-thumbnail @(pageNum == _currentPage ? "pdf-thumbnail--active" : "")" @onclick="() => GoToPageFromThumbnail(pageNum)">
+                                        <div class="pdf-thumbnail__preview">
+                                            <canvas id="thumb-canvas-@pageNum" class="pdf-thumbnail__canvas"></canvas>
+                                        </div>
+                                        <div class="pdf-thumbnail__label">@pageNum</div>
+                                    </div>
+                                }
+                            </div>
+                        </div>
+                        <!-- Resizable Splitter -->
+                        <div class="pdf-splitter @(_isResizing ? "resizing" : "")" 
+                             @onmousedown="OnSplitterMouseDown"
+                             @onmousedown:preventDefault="true">
+                        </div>
+                    }
+                    <div class="pdf-canvas-wrapper">
+                        <div class="pdf-page-container">
+                            <canvas id="pdf-canvas" class="pdf-canvas"></canvas>
+                            <div id="pdf-text-layer" class="pdf-text-layer"></div>
+                            <div id="pdf-signature-layer" class="pdf-signature-layer"></div>
+                        </div>
+                    </div>
+                </div>
+            </div>
+        } else {
+            <div class="error-container">
+                <div class="alert alert-warning shadow-lg">
+                    <div class="d-flex align-items-center">
+                        <svg xmlns="http://www.w3.org/2000/svg" width="28" height="28" fill="currentColor" class="me-3" viewBox="0 0 16 16">
+                            <path d="M8.982 1.566a1.13 1.13 0 0 0-1.96 0L.165 13.233c-.457.778.091 1.767.98 1.767h13.713c.889 0 1.438-.99.98-1.767L8.982 1.566zM8 5c.535 0 .954.462.9.995l-.35 3.507a.552.552 0 0 1-1.1 0L7.1 5.995A.905.905 0 0 1 8 5zm.002 6a1 1 0 1 1 0 2 1 1 0 0 1 0-2z"/>
+                        </svg>
+                        <span class="fs-5">Dokument konnte nicht geladen werden.</span>
+                    </div>
+                </div>
+            </div>
+        }
+    </div>
+</div>
+
+<DxPopup @bind-Visible="_signaturePopupVisible"
+HeaderText="Unterschrift erstellen"
+Width="620px"
+MaxWidth="95vw"
+ShowFooter="true"
+CloseOnOutsideClick="false"
+ShowCloseButton="false"
+CloseOnEscape="false"
+Shown="OnPopupShownAsync">
+    <BodyContentTemplate>
+        <ul class="nav nav-tabs mb-3" style="border-bottom: 2px solid #e9ecef;">
+            <li class="nav-item">
+                <button type="button" 
+                        class="nav-link @(_activeSignatureTab == SignatureTabDraw ? "active" : "")" 
+                        style="@(_activeSignatureTab == SignatureTabDraw ? "border-bottom: 3px solid #4F46E5; color: #4F46E5; font-weight: 600;" : "color: #6c757d;")"
+                        @onclick="() => SetSignatureTabAsync(SignatureTabDraw)">
+                    Zeichnen
+                </button>
+            </li>
+            <li class="nav-item">
+                <button type="button" 
+                        class="nav-link @(_activeSignatureTab == SignatureTabText ? "active" : "")"
+                        style="@(_activeSignatureTab == SignatureTabText ? "border-bottom: 3px solid #4F46E5; color: #4F46E5; font-weight: 600;" : "color: #6c757d;")"
+                        @onclick="() => SetSignatureTabAsync(SignatureTabText)">
+                    Text
+                </button>
+            </li>
+            <li class="nav-item">
+                <button type="button" 
+                        class="nav-link @(_activeSignatureTab == SignatureTabImage ? "active" : "")"
+                        style="@(_activeSignatureTab == SignatureTabImage ? "border-bottom: 3px solid #4F46E5; color: #4F46E5; font-weight: 600;" : "color: #6c757d;")"
+                        @onclick="() => SetSignatureTabAsync(SignatureTabImage)">
+                    Bild
+                </button>
+            </li>
+        </ul>
+
+        @if(_activeSignatureTab == SignatureTabDraw) {
+            <p style="color: #6c757d; font-size: 0.875rem; margin-bottom: 0.75rem;">Bitte unterschreiben Sie im folgenden Feld.</p>
+            <canvas id="envelope-signature-pad" 
+                    width="560" 
+                    height="180" 
+                    style="border: 2px solid #e9ecef; border-radius: 8px; background: white; width: 100%; max-width: 560px; touch-action: none; box-shadow: 0 1px 3px rgba(0,0,0,0.1);"></canvas>
+        } else if(_activeSignatureTab == SignatureTabText) {
+            <p style="color: #6c757d; font-size: 0.875rem; margin-bottom: 0.75rem;">Geben Sie Ihre Unterschrift als Text ein und wählen Sie eine Schriftart.</p>
+            <div class="row g-3 mb-3">
+                <div class="col-12 col-md-7">
+                    <input class="form-control" 
+                           placeholder="Ihre Unterschrift" 
+                           value="@_typedSignatureText" 
+                           @oninput="OnTypedSignatureChanged"
+                           style="border: 2px solid #e9ecef; border-radius: 6px; padding: 0.625rem;" />
+                </div>
+                <div class="col-12 col-md-5">
+                    <select class="form-select" 
+                            value="@_typedSignatureFont" 
+                            @onchange="OnTypedSignatureFontChanged"
+                            style="border: 2px solid #e9ecef; border-radius: 6px; padding: 0.625rem;">
+                        @foreach(var font in TypedSignatureFonts) {
+                            <option value="@font.Value" style="font-family: @font.Value">@font.Text</option>
+                        }
+                    </select>
+                </div>
+            </div>
+            <canvas id="envelope-typed-signature-pad" 
+                    width="560" 
+                    height="180" 
+                    style="border: 2px solid #e9ecef; border-radius: 8px; background: white; width: 100%; max-width: 560px; box-shadow: 0 1px 3px rgba(0,0,0,0.1);"></canvas>
+        } else {
+            <p style="color: #6c757d; font-size: 0.875rem; margin-bottom: 0.75rem;">Laden Sie ein Bild Ihrer Unterschrift hoch.</p>
+            <input id="envelope-signature-image-input" 
+                   class="form-control mb-3" 
+                   type="file" 
+                   accept="image/png,image/jpeg,image/webp"
+                   style="border: 2px solid #e9ecef; border-radius: 6px; padding: 0.625rem;" />
+            <canvas id="envelope-image-signature-pad" 
+                    width="560" 
+                    height="180" 
+                    style="border: 2px solid #e9ecef; border-radius: 8px; background: white; width: 100%; max-width: 560px; box-shadow: 0 1px 3px rgba(0,0,0,0.1);"></canvas>
+        }
+
+        <div style="border-top: 2px solid #e9ecef; margin-top: 1.5rem; padding-top: 1.5rem;">
+            <div class="row g-3">
+                <div class="col-12 col-md-6">
+                    <label class="form-label" for="envelope-signer-name" style="font-size: 0.875rem; font-weight: 500; color: #495057;">
+                        Vor- und Nachname <span style="color: #dc3545;">*</span>
+                    </label>
+                    <input id="envelope-signer-name" 
+                           class="form-control" 
+                           value="@_signerFullName" 
+                           @oninput="args => _signerFullName = args.Value?.ToString() ?? string.Empty"
+                           style="border: 2px solid #e9ecef; border-radius: 6px; padding: 0.625rem;" />
+                </div>
+                <div class="col-12 col-md-6">
+                    <label class="form-label" for="envelope-signer-position" style="font-size: 0.875rem; font-weight: 500; color: #495057;">
+                        Position <span style="color: #6c757d; font-weight: 400;">(optional)</span>
+                    </label>
+                    <input id="envelope-signer-position" 
+                           class="form-control" 
+                           value="@_signerPosition" 
+                           @oninput="args => _signerPosition = args.Value?.ToString() ?? string.Empty"
+                           style="border: 2px solid #e9ecef; border-radius: 6px; padding: 0.625rem;" />
+                </div>
+                <div class="col-12 col-md-6">
+                    <label class="form-label" for="envelope-signature-place" style="font-size: 0.875rem; font-weight: 500; color: #495057;">
+                        Ort <span style="color: #dc3545;">*</span>
+                    </label>
+                    <input id="envelope-signature-place" 
+                           class="form-control" 
+                           value="@_signaturePlace" 
+                           @oninput="args => _signaturePlace = args.Value?.ToString() ?? string.Empty"
+                           style="border: 2px solid #e9ecef; border-radius: 6px; padding: 0.625rem;" />
+                </div>
+            </div>
+        </div>
+
+        @if(!string.IsNullOrWhiteSpace(_popupValidationMessage)) {
+            <div style="background: #fee; border-left: 4px solid #dc3545; padding: 0.75rem 1rem; margin-top: 1rem; border-radius: 4px;">
+                <span style="color: #dc3545; font-size: 0.875rem; font-weight: 500;">@_popupValidationMessage</span>
+            </div>
+        }
+    </BodyContentTemplate>
+    <FooterContentTemplate>
+        <div class="d-flex gap-2 justify-content-between w-100" style="padding: 0.5rem 0;">
+            <button class="btn btn-outline-secondary" 
+                    @onclick="RenewSignatureAsync"
+                    style="border-radius: 6px; padding: 0.625rem 1.25rem; font-weight: 500;">
+                <svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" fill="currentColor" class="me-1" viewBox="0 0 16 16">
+                    <path fill-rule="evenodd" d="M8 3a5 5 0 1 0 4.546 2.914.5.5 0 0 1 .908-.417A6 6 0 1 1 8 2v1z"/>
+                    <path d="M8 4.466V.534a.25.25 0 0 1 .41-.192l2.36 1.966c.12.1.12.284 0 .384L8.41 4.658A.25.25 0 0 1 8 4.466z"/>
+                </svg>
+                Erneuern
+            </button>
+            <button class="btn btn-primary" 
+                    @onclick="SaveSignatureAsync"
+                    style="background: linear-gradient(135deg, #4F46E5 0%, #4338CA 100%); border: none; border-radius: 6px; padding: 0.625rem 2rem; font-weight: 600; box-shadow: 0 2px 4px rgba(79, 70, 229, 0.3);">
+                <svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" fill="currentColor" class="me-1" viewBox="0 0 16 16">
+                    <path d="M13.854 3.646a.5.5 0 0 1 0 .708l-7 7a.5.5 0 0 1-.708 0l-3.5-3.5a.5.5 0 1 1 .708-.708L6.5 10.293l6.646-6.647a.5.5 0 0 1 .708 0z"/>
+                </svg>
+                Speichern
+            </button>
+        </div>
+    </FooterContentTemplate>
+</DxPopup>
+
+@code {
+// Signature tab constants
+const string SignatureTabDraw = "draw";
+const string SignatureTabText = "text";
+const string SignatureTabImage = "image";
+const string DrawCanvasId = "envelope-signature-pad";
+const string TypedCanvasId = "envelope-typed-signature-pad";
+const string ImageInputId = "envelope-signature-image-input";
+const string ImageCanvasId = "envelope-image-signature-pad";
+
+readonly (string Text, string Value)[] TypedSignatureFonts = {
+    ("Brush Script", "'Brush Script MT', cursive"),
+    ("Segoe Script", "'Segoe Script', cursive"),
+    ("Lucida Handwriting", "'Lucida Handwriting', cursive"),
+    ("Comic Sans", "'Comic Sans MS', cursive"),
+    ("Cursive", "cursive")
+};
+
+[Parameter] public string? EnvelopeKey { get; set; }
+
+bool _isLoading = true;
+string? _errorMessage;
+string? _pdfDataUrl;
+bool _pdfLoaded = false;
+int _currentPage = 1;
+int _totalPages = 0;
+int _currentZoom = 150;
+bool _showThumbnails = true;
+bool _isLoggingOut = false;
+DotNetObjectReference<EnvelopeViewer>? _dotNetRef;
+IReadOnlyList<SignatureDto> _signatures = [];
+EnvelopeReceiverDto? _envelopeReceiver;
+
+// Signature navigation state
+int _totalSignatures = 0;
+int _signedSignatures = 0;
+int _unsignedSignatures = 0;
+int _currentSignatureIndex = 0;  // Şu an hangi imzada (1-based)
+
+// Signature state
+SignatureCaptureDto? _capturedSignature;
+bool _signaturePopupVisible = false;
+string? _popupValidationMessage;
+string _activeSignatureTab = SignatureTabDraw;
+string _typedSignatureText = string.Empty;
+string _typedSignatureFont = "'Brush Script MT', cursive";
+string _signerFullName = string.Empty;
+string _signerPosition = string.Empty;
+string _signaturePlace = string.Empty;
+
+// Resizable splitter state
+int _thumbnailWidth = 260;
+bool _isResizing = false;
+int _resizeStartX = 0;
+int _resizeStartWidth = 0;
+const int MinThumbnailWidth = 150;
+const int MaxThumbnailWidth = 400;
+
+    async Task LogoutAsync() {
+        if (string.IsNullOrWhiteSpace(EnvelopeKey) || _isLoggingOut) return;
+        _isLoggingOut = true;
+        await InvokeAsync(StateHasChanged);
+        await AuthService.LogoutEnvelopeReceiverAsync(EnvelopeKey);
+        Navigation.NavigateTo($"/login/{Uri.EscapeDataString(EnvelopeKey)}", forceLoad: true);
+    }
+
+    protected override async Task OnInitializedAsync() {
+        if (string.IsNullOrWhiteSpace(EnvelopeKey)) {
+            _errorMessage = "Envelope-Schlüssel fehlt.";
+            _isLoading = false;
+            return;
+        }
+
+        // Check authentication
+        var hasAccess = await AuthService.CheckEnvelopeAccessAsync(EnvelopeKey);
+        if (!hasAccess) {
+            Navigation.NavigateTo($"/login/{Uri.EscapeDataString(EnvelopeKey)}");
+            return;
+        }
+
+        try {
+            var (pdfBytes, statusCode) = await DocumentService.GetDocumentAsync(EnvelopeKey);
+
+            if (pdfBytes is { Length: > 0 }) {
+                var base64 = Convert.ToBase64String(pdfBytes);
+                _pdfDataUrl = $"data:application/pdf;base64,{base64}";
+            } else {
+                _errorMessage = $"Dokument konnte nicht geladen werden. HTTP Status: {statusCode}";
+            }
+
+            var signatures = await SignatureService.GetAsync(EnvelopeKey);
+            _signatures = signatures.Convert(UnitOfLength.Point);
+
+            _envelopeReceiver = await EnvelopeReceiverService.GetAsync(EnvelopeKey);
+
+            await JSRuntime.InvokeVoidAsync("console.log", "Loaded signatures:", _signatures);
+
+            // Open signature popup on page load
+            _activeSignatureTab = SignatureTabDraw;
+            _signaturePopupVisible = true;
+            _popupValidationMessage = null;
+
+        } catch (Exception ex) {
+            _errorMessage = $"Fehler: {ex.Message}";
+        }
+
+        _isLoading = false;
+        await InvokeAsync(StateHasChanged);
+    }
+
+    protected override async Task OnAfterRenderAsync(bool firstRender) {
+        if (firstRender) {
+            // Load saved thumbnail width from localStorage
+            try {
+                var savedWidth = await JSRuntime.InvokeAsync<string>("localStorage.getItem", "envelopeViewer_thumbnailWidth");
+                if (!string.IsNullOrEmpty(savedWidth) && int.TryParse(savedWidth, out var width)) {
+                    _thumbnailWidth = Math.Clamp(width, MinThumbnailWidth, MaxThumbnailWidth);
+                    await InvokeAsync(StateHasChanged);
+                }
+            } catch {
+                // Ignore localStorage errors
+            }
+        }
+
+        if (!_pdfLoaded && !string.IsNullOrWhiteSpace(_pdfDataUrl)) {
+            await Task.Delay(500);
+            
+            try {
+                _dotNetRef = DotNetObjectReference.Create(this);
+                
+                // Send quality options to JavaScript
+                var options = PdfViewerOptions.Value;
+                await JSRuntime.InvokeVoidAsync("pdfViewer.setQualityOptions", new
+                {
+                    options.ThumbnailBaseScale,
+                    options.ThumbnailEnableHiDPI,
+                    options.ThumbnailMaxDPR,
+                    options.MainCanvasEnableHiDPI,
+                    options.MainCanvasMaxDPR,
+                    options.EnableSmoothZoom,
+                    options.ZoomTransitionDuration,
+                    options.RenderingOpacity,
+                    options.ZoomStepPercentage
+                });
+                
+                var success = await JSRuntime.InvokeAsync<bool>("pdfViewer.initialize", "pdf-canvas", _pdfDataUrl, _dotNetRef);
+                
+                if (success) {
+                    _pdfLoaded = true;
+                    _totalPages = await JSRuntime.InvokeAsync<int>("pdfViewer.getTotalPages");
+                    _currentPage = await JSRuntime.InvokeAsync<int>("pdfViewer.getCurrentPage");
+                    
+                    // Attach resize listeners
+                    await JSRuntime.InvokeVoidAsync("pdfViewer.attachResizeListeners", _dotNetRef);
+                    
+                    
+                    await InvokeAsync(StateHasChanged);
+                    
+                    // Wait for DOM to be ready, then render thumbnails
+                    await Task.Delay(100);
+                    await RenderThumbnailsAsync();
+                    
+                    // Render signature buttons
+                    await RenderSignatureButtonsAsync();
+                }
+            } catch (Exception ex) {
+                _errorMessage = $"PDF.js Fehler: {ex.Message}";
+                await InvokeAsync(StateHasChanged);
+            }
+        }
+    }
+
+    [JSInvokable]
+    public async Task OnZoomChanged(double scale)
+    {
+        _currentZoom = (int)(scale * 100);
+        await InvokeAsync(StateHasChanged);
+        
+        // Small delay for canvas render to complete (reduced from 100ms to 10ms)
+        await Task.Delay(10);
+        await RenderSignatureButtonsAsync();
+    }
+
+    async Task NextPage() {
+        if (await JSRuntime.InvokeAsync<bool>("pdfViewer.nextPage")) {
+            _currentPage = await JSRuntime.InvokeAsync<int>("pdfViewer.getCurrentPage");
+            await RenderSignatureButtonsAsync();
+        }
+    }
+
+    async Task PreviousPage() {
+        if (await JSRuntime.InvokeAsync<bool>("pdfViewer.previousPage")) {
+            _currentPage = await JSRuntime.InvokeAsync<int>("pdfViewer.getCurrentPage");
+            await RenderSignatureButtonsAsync();
+        }
+    }
+
+    async Task ZoomIn() {
+        if (_currentZoom >= 300) return;
+        await JSRuntime.InvokeVoidAsync("pdfViewer.zoomIn");
+        var scale = await JSRuntime.InvokeAsync<double>("pdfViewer.getScale");
+        _currentZoom = (int)(scale * 100);
+        
+        // Update signature overlay positions after zoom
+        await RenderSignatureButtonsAsync();
+    }
+
+    async Task ZoomOut() {
+        if (_currentZoom <= 50) return;
+        await JSRuntime.InvokeVoidAsync("pdfViewer.zoomOut");
+        var scale = await JSRuntime.InvokeAsync<double>("pdfViewer.getScale");
+        _currentZoom = (int)(scale * 100);
+        
+        // Update signature overlay positions after zoom
+        await RenderSignatureButtonsAsync();
+    }
+
+    async Task SetZoom(int percentage) {
+        var scale = percentage / 100.0;
+        await JSRuntime.InvokeVoidAsync("pdfViewer.setScale", scale);
+        _currentZoom = percentage;
+    }
+
+    async Task OnZoomSliderChanged(ChangeEventArgs e) {
+        if (int.TryParse(e.Value?.ToString(), out var zoom)) {
+            await SetZoom(zoom);
+            
+            // Update signature overlay positions after zoom
+            await RenderSignatureButtonsAsync();
+        }
+    }
+
+    async Task OnPageInputChanged(ChangeEventArgs e) {
+        if (int.TryParse(e.Value?.ToString(), out var pageNum) && pageNum >= 1 && pageNum <= _totalPages) {
+            if (await JSRuntime.InvokeAsync<bool>("pdfViewer.goToPage", pageNum)) {
+                _currentPage = pageNum;
+            }
+        }
+    }
+
+    async Task FitToWidth() {
+        await JSRuntime.InvokeVoidAsync("pdfViewer.fitToWidth");
+        var scale = await JSRuntime.InvokeAsync<double>("pdfViewer.getScale");
+        _currentZoom = (int)(scale * 100);
+    }
+
+    async Task ToggleThumbnails() {
+        _showThumbnails = !_showThumbnails;
+        
+        // Re-render thumbnails when showing them
+        if (_showThumbnails && _pdfLoaded) {
+            await InvokeAsync(StateHasChanged); // Force UI update first
+            await Task.Delay(150); // Wait for DOM to render canvas elements
+            await RenderThumbnailsAsync();
+        }
+    }
+
+    async Task GoToPageFromThumbnail(int pageNum) {
+        if (await JSRuntime.InvokeAsync<bool>("pdfViewer.goToPage", pageNum)) {
+            _currentPage = pageNum;
+            await RenderSignatureButtonsAsync();
+        }
+    }
+
+    async Task RenderSignatureButtonsAsync() {
+        if (_signatures.Count == 0 || !_pdfLoaded) return;
+
+        try {
+            await JSRuntime.InvokeVoidAsync("pdfViewer.renderSignatureButtons", _signatures, _currentPage, _dotNetRef);
+            await UpdateSignatureCounterAsync();
+        } catch (Exception ex) {
+            System.Diagnostics.Debug.WriteLine($"Signature button rendering error: {ex.Message}");
+        }
+    }
+
+    [JSInvokable]
+    public async Task OnSignatureButtonClick(int signatureId) {
+        if (_capturedSignature == null) {
+            // No signature captured yet - should not happen as popup is shown on page load
+            return;
+        }
+
+        // Apply signature to PDF canvas
+        await JSRuntime.InvokeVoidAsync("pdfViewer.applySignature", 
+            signatureId, 
+            _capturedSignature.DataUrl,
+            _capturedSignature.FullName,
+            _capturedSignature.Position,
+            _capturedSignature.Place);
+        
+        // Update counter
+        await UpdateSignatureCounterAsync();
+    }
+
+    [JSInvokable]
+    public async Task OnSignatureNavChanged() {
+        await UpdateSignatureCounterAsync();
+    }
+
+    [JSInvokable]
+    public async Task OnPageChangedBySignatureNav(int newPage) {
+        _currentPage = newPage;
+        await RenderSignatureButtonsAsync();
+    }
+
+    async Task UpdateSignatureCounterAsync() {
+        try {
+            var state = await JSRuntime.InvokeAsync<SignatureNavState>("pdfViewer.getSignatureNavState");
+            _totalSignatures = state.Total;
+            _signedSignatures = state.Signed;
+            _unsignedSignatures = state.Unsigned;
+            _currentSignatureIndex = state.CurrentIndex;  // Şu an hangi imzada
+            await InvokeAsync(StateHasChanged);
+        } catch {
+            // Ignore errors during counter update
+        }
+    }
+
+    async Task GoToPreviousSignature() {
+        await JSRuntime.InvokeVoidAsync("pdfViewer.goToPreviousSignature", _dotNetRef);
+    }
+
+    async Task GoToNextSignature() {
+        await JSRuntime.InvokeVoidAsync("pdfViewer.goToNextSignature", _dotNetRef);
+    }
+
+    void RestartSigning() {
+        // Force page reload to reset all signatures and state
+        Navigation.NavigateTo(Navigation.Uri, forceLoad: true);
+    }
+
+    record SignatureNavState(int Total, int Signed, int Unsigned, int CurrentIndex, bool CanGoPrev, bool CanGoNext);
+
+    // Signature popup methods
+    void OpenSignaturePopup() {
+        _activeSignatureTab = SignatureTabDraw;
+        _signaturePopupVisible = true;
+        _popupValidationMessage = null;
+    }
+
+    async Task OnPopupShownAsync() {
+        await InitializeActiveSignatureTabAsync();
+    }
+
+    async Task SetSignatureTabAsync(string tab) {
+        _activeSignatureTab = tab;
+        _popupValidationMessage = null;
+        await InvokeAsync(StateHasChanged);
+        await Task.Delay(50);
+        await InitializeActiveSignatureTabAsync();
+    }
+
+    async Task InitializeActiveSignatureTabAsync() {
+        if(_activeSignatureTab == SignatureTabDraw) {
+            await JSRuntime.InvokeVoidAsync("receiverSignature.initialize", DrawCanvasId);
+        } else if(_activeSignatureTab == SignatureTabText) {
+            await JSRuntime.InvokeVoidAsync("receiverSignature.initializeTyped", TypedCanvasId);
+            await RenderTypedSignatureAsync();
+        } else {
+            await JSRuntime.InvokeVoidAsync("receiverSignature.initializeImage", ImageInputId, ImageCanvasId);
+        }
+    }
+
+    async Task RenewSignatureAsync() {
+        _popupValidationMessage = null;
+
+        if(_activeSignatureTab == SignatureTabDraw) {
+            await JSRuntime.InvokeVoidAsync("receiverSignature.clear", DrawCanvasId);
+        } else if(_activeSignatureTab == SignatureTabText) {
+            _typedSignatureText = string.Empty;
+            await JSRuntime.InvokeVoidAsync("receiverSignature.clearTyped", TypedCanvasId);
+        } else {
+            await JSRuntime.InvokeVoidAsync("receiverSignature.clearImage", ImageInputId, ImageCanvasId);
+        }
+    }
+
+    async Task OnTypedSignatureChanged(Microsoft.AspNetCore.Components.ChangeEventArgs args) {
+        _typedSignatureText = args.Value?.ToString() ?? string.Empty;
+        await RenderTypedSignatureAsync();
+    }
+
+    async Task OnTypedSignatureFontChanged(Microsoft.AspNetCore.Components.ChangeEventArgs args) {
+        _typedSignatureFont = args.Value?.ToString() ?? _typedSignatureFont;
+        await RenderTypedSignatureAsync();
+    }
+
+    async Task RenderTypedSignatureAsync() {
+        await JSRuntime.InvokeVoidAsync("receiverSignature.renderTypedSignature", TypedCanvasId, _typedSignatureText, _typedSignatureFont);
+    }
+
+    async Task SaveSignatureAsync() {
+        if (string.IsNullOrWhiteSpace(_signerFullName)) {
+            _popupValidationMessage = "Bitte geben Sie Vor- und Nachname ein.";
+            return;
+        }
+        if (string.IsNullOrWhiteSpace(_signaturePlace)) {
+            _popupValidationMessage = "Bitte geben Sie den Ort ein.";
+            return;
+        }
+        var signatureDataUrl = await GetActiveSignatureDataUrlAsync();
+        if (string.IsNullOrWhiteSpace(signatureDataUrl)) {
+            _popupValidationMessage = "Die Unterschrift ist erforderlich.";
+            return;
+        }
+
+        _popupValidationMessage = null;
+        _capturedSignature = new SignatureCaptureDto
+        {
+            DataUrl = signatureDataUrl,
+            FullName = _signerFullName.Trim(),
+            Position = _signerPosition.Trim(),
+            Place = _signaturePlace.Trim()
+        };
+        _signaturePopupVisible = false;
+        
+        await InvokeAsync(StateHasChanged);
+        Console.WriteLine($"Signature saved: {_signerFullName}, {_signaturePlace}");
+    }
+
+    async Task<string?> GetActiveSignatureDataUrlAsync() {
+        if(_activeSignatureTab == SignatureTabDraw)
+            return await JSRuntime.InvokeAsync<string?>("receiverSignature.getDataUrl", DrawCanvasId);
+
+        if(_activeSignatureTab == SignatureTabText) {
+            await RenderTypedSignatureAsync();
+            return await JSRuntime.InvokeAsync<string?>("receiverSignature.getTypedDataUrl", TypedCanvasId);
+        }
+
+        return await JSRuntime.InvokeAsync<string?>("receiverSignature.getImageDataUrl", ImageCanvasId);
+    }
+
+    async Task RenderThumbnailsAsync() {
+        try {
+            var delay = PdfViewerOptions.Value.ThumbnailRenderDelay;
+            
+            // Sequential rendering to avoid overwhelming the browser
+            for (int i = 1; i <= _totalPages; i++) {
+                await JSRuntime.InvokeVoidAsync("pdfViewer.renderThumbnail", i, $"thumb-canvas-{i}");
+                
+                // Configurable delay between renders
+                if (i < _totalPages) {
+                    await Task.Delay(delay);
+                }
+            }
+        } catch (Exception ex) {
+            // Thumbnail rendering is not critical
+            System.Diagnostics.Debug.WriteLine($"Thumbnail rendering error: {ex.Message}");
+        }
+    }
+
+    // Resizable splitter methods
+    void OnSplitterMouseDown(MouseEventArgs e) {
+        _isResizing = true;
+        _resizeStartX = (int)e.ClientX;
+        _resizeStartWidth = _thumbnailWidth;
+        
+        // Add resizing class to body to prevent text selection
+        _ = JSRuntime.InvokeVoidAsync("eval", "document.body.classList.add('resizing')");
+        _ = JSRuntime.InvokeVoidAsync("pdfViewer.startResize");
+    }
+
+    [JSInvokable]
+    public async Task OnSplitterMouseMove(int clientX) {
+        if (!_isResizing) return;
+
+        var delta = clientX - _resizeStartX;
+        var newWidth = _resizeStartWidth + delta;
+        
+        // Clamp to min/max
+        _thumbnailWidth = Math.Clamp(newWidth, MinThumbnailWidth, MaxThumbnailWidth);
+        
+        await InvokeAsync(StateHasChanged);
+    }
+
+    [JSInvokable]
+    public async Task OnSplitterMouseUp() {
+        if (!_isResizing) return;
+        
+        _isResizing = false;
+        
+        // Remove resizing class from body
+        await JSRuntime.InvokeVoidAsync("eval", "document.body.classList.remove('resizing')");
+        
+        // Save preference to localStorage
+        await JSRuntime.InvokeVoidAsync("localStorage.setItem", "envelopeViewer_thumbnailWidth", _thumbnailWidth.ToString());
+        
+        await InvokeAsync(StateHasChanged);
+    }
+
+    public async ValueTask DisposeAsync() {
+        if (_pdfLoaded) {
+            try {
+                await JSRuntime.InvokeVoidAsync("pdfViewer.dispose");
+            } catch {
+                // Ignore errors during disposal
+            }
+        }
+        _dotNetRef?.Dispose();
+    }
+}

EnvelopeGenerator.ReceiverUI/Pages/Index.razor

@@ -0,0 +1,71 @@
+@page "/"
+@inject IJSRuntime JS
+
+<link href="_content/DevExpress.Blazor.Themes/blazing-berry.bs5.min.css" rel="stylesheet" />
+
+<div class="home-page-wrapper">
+
+    <div class="home-hero-header">
+        <div class="home-hero-header__inner">
+            <svg xmlns="http://www.w3.org/2000/svg" width="48" height="48" fill="currentColor" class="home-hero-header__icon" viewBox="0 0 16 16">
+                <path d="M0 4a2 2 0 0 1 2-2h12a2 2 0 0 1 2 2v8a2 2 0 0 1-2 2H2a2 2 0 0 1-2-2V4Zm2-1a1 1 0 0 0-1 1v.217l7 4.2 7-4.2V4a1 1 0 0 0-1-1H2Zm13 2.383-4.708 2.825L15 11.105V5.383Zm-.034 6.876-5.64-3.471L8 9.583l-1.326-.795-5.64 3.47A1 1 0 0 0 2 13h12a1 1 0 0 0 .966-.741ZM1 11.105l4.708-2.897L1 5.383v5.722Z"/>
+            </svg>
+            <div>
+                <h1 class="home-hero-header__title">SignFlow</h1>
+                <p class="home-hero-header__subtitle">Willkommen im eSign-Portal</p>
+            </div>
+        </div>
+    </div>
+
+    <div class="home-content">
+        <div class="home-card card shadow border-0">
+            <div class="card-body p-4 p-md-5">
+
+                <p class="text-muted mb-4" style="font-size: 0.92rem; line-height: 1.7; text-align: justify; text-align-last: left; min-height: calc(0.92rem * 1.7 * 9);">
+                    <span id="home-description"></span>
+                </p>
+
+                <div class="mt-4 pt-3 border-top">
+                    <div class="d-flex flex-wrap justify-content-center gap-3">
+                        <div class="home-feature-badge">
+                            <svg xmlns="http://www.w3.org/2000/svg" width="15" height="15" fill="currentColor" class="me-1" viewBox="0 0 16 16">
+                                <path d="M8 1a2 2 0 0 1 2 2v4H6V3a2 2 0 0 1 2-2zm3 6V3a3 3 0 0 0-6 0v4a2 2 0 0 0-2 2v5a2 2 0 0 0 2 2h6a2 2 0 0 0 2-2V9a2 2 0 0 0-2-2z"/>
+                            </svg>
+                            Sicherer Zugang
+                        </div>
+                        <div class="home-feature-badge">
+                            <svg xmlns="http://www.w3.org/2000/svg" width="15" height="15" fill="currentColor" class="me-1" viewBox="0 0 16 16">
+                                <path d="M13.854 3.646a.5.5 0 0 1 0 .708l-7 7a.5.5 0 0 1-.708 0l-3.5-3.5a.5.5 0 1 1 .708-.708L6.5 10.293l6.646-6.647a.5.5 0 0 1 .708 0z"/>
+                            </svg>
+                            Digitale Unterschrift
+                        </div>
+                        <div class="home-feature-badge">
+                            <svg xmlns="http://www.w3.org/2000/svg" width="15" height="15" fill="currentColor" class="me-1" viewBox="0 0 16 16">
+                                <path d="M.5 9.9a.5.5 0 0 1 .5.5v2.5a1 1 0 0 0 1 1h12a1 1 0 0 0 1-1v-2.5a.5.5 0 0 1 1 0v2.5a2 2 0 0 1-2 2H2a2 2 0 0 1-2-2v-2.5a.5.5 0 0 1 .5-.5z"/>
+                                <path d="M7.646 11.854a.5.5 0 0 0 .708 0l3-3a.5.5 0 0 0-.708-.708L8.5 10.293V1.5a.5.5 0 0 0-1 0v8.793L5.354 8.146a.5.5 0 1 0-.708.708l3 3z"/>
+                            </svg>
+                            PDF-Export
+                        </div>
+                    </div>
+                </div>
+
+            </div>
+        </div>
+    </div>
+
+</div>
+
+@code {
+    private const string HomePageDescription =
+        "Das digitale Unterschriftenportal ist eine Plattform, die entwickelt wurde, um Ihre Dokumente sicher zu unterschreiben und zu verwalten. " +
+        "Mit seiner benutzerfreundlichen Oberfläche können Sie Ihre Dokumente schnell hochladen, die Unterschriftsprozesse verfolgen und Ihre digitalen Unterschriftenanwendungen einfach durchführen. " +
+        "Dieses Portal beschleunigt Ihren Arbeitsablauf mit rechtlich gültigen Unterschriften und erhöht gleichzeitig die Sicherheit Ihrer Dokumente.";
+
+    protected override async Task OnAfterRenderAsync(bool firstRender)
+    {
+        if (firstRender)
+        {
+            await JS.InvokeVoidAsync("receiverSignature.startTyped", "home-description", HomePageDescription, 15);
+        }
+    }
+}

EnvelopeGenerator.ReceiverUI/Pages/Login.razor

@@ -0,0 +1,158 @@
+@page "/login/{EnvelopeKey}"
+@using EnvelopeGenerator.ReceiverUI.Services
+@inject AuthService AuthService
+@inject NavigationManager Navigation
+
+<link href="_content/DevExpress.Blazor.Themes/blazing-berry.bs5.min.css" rel="stylesheet" />
+
+<div class="login-page-wrapper d-flex align-items-center justify-content-center min-vh-100">
+    <div class="login-card card shadow border-0" style="max-width: 440px; width: 100%;">
+
+        <div class="card-header text-white text-center py-4 border-0" style="background: linear-gradient(135deg, #2c3e50 0%, #3498db 100%); border-radius: calc(0.375rem - 1px) calc(0.375rem - 1px) 0 0;">
+            <div class="mb-2">
+                <svg xmlns="http://www.w3.org/2000/svg" width="40" height="40" fill="currentColor" viewBox="0 0 16 16">
+                    <path d="M8 1a2 2 0 0 1 2 2v4H6V3a2 2 0 0 1 2-2zm3 6V3a3 3 0 0 0-6 0v4a2 2 0 0 0-2 2v5a2 2 0 0 0 2 2h6a2 2 0 0 0 2-2V9a2 2 0 0 0-2-2z"/>
+                </svg>
+            </div>
+            <h5 class="mb-0 fw-semibold">Dokument öffnen</h5>
+            <p class="mb-0 mt-1 opacity-75" style="font-size: 0.85rem;">Sicherer Zugang mit Zugangscode</p>
+        </div>
+
+        <div class="card-body p-4">
+
+            <p class="text-muted mb-4" style="font-size: 0.875rem; line-height: 1.5;">
+                Bitte geben Sie den Zugangscode ein, den Sie per E-Mail erhalten haben, um das Dokument sicher zu öffnen.
+            </p>
+
+            @if (LoginResult == EnvelopeLoginResult.NotFound) {
+                <div class="alert alert-warning d-flex align-items-start gap-2 py-2" role="alert">
+                    <svg xmlns="http://www.w3.org/2000/svg" width="18" height="18" fill="currentColor" class="flex-shrink-0 mt-1" viewBox="0 0 16 16">
+                        <path d="M8.982 1.566a1.13 1.13 0 0 0-1.96 0L.165 13.233c-.457.778.091 1.767.98 1.767h13.713c.889 0 1.438-.99.98-1.767L8.982 1.566zM8 5c.535 0 .954.462.9.995l-.35 3.507a.552.552 0 0 1-1.1 0L7.1 5.995A.905.905 0 0 1 8 5zm.002 6a1 1 0 1 1 0 2 1 1 0 0 1 0-2z"/>
+                    </svg>
+                    <div>
+                        <strong>Dokument nicht gefunden.</strong><br />
+                        <span style="font-size:0.85rem;">Der angegebene Zugangscode konnte keinem Dokument zugeordnet werden. Bitte prüfen Sie den Link in Ihrer E-Mail.</span>
+                    </div>
+                </div>
+            } else if (LoginResult == EnvelopeLoginResult.InvalidCode) {
+                <div class="alert alert-danger d-flex align-items-start gap-2 py-2" role="alert">
+                    <svg xmlns="http://www.w3.org/2000/svg" width="18" height="18" fill="currentColor" class="flex-shrink-0 mt-1" viewBox="0 0 16 16">
+                        <path d="M16 8A8 8 0 1 1 0 8a8 8 0 0 1 16 0zM5.354 4.646a.5.5 0 1 0-.708.708L7.293 8l-2.647 2.646a.5.5 0 0 0 .708.708L8 8.707l2.646 2.647a.5.5 0 0 0 .708-.708L8.707 8l2.647-2.646a.5.5 0 0 0-.708-.708L8 7.293 5.354 4.646z"/>
+                    </svg>
+                    <div>
+                        <strong>Ungültiger Zugangscode.</strong><br />
+                        <span style="font-size:0.85rem;">Der eingegebene Code ist falsch. Bitte versuchen Sie es erneut.</span>
+                    </div>
+                </div>
+            } else if (LoginResult == EnvelopeLoginResult.Error) {
+                <div class="alert alert-secondary d-flex align-items-start gap-2 py-2" role="alert">
+                    <svg xmlns="http://www.w3.org/2000/svg" width="18" height="18" fill="currentColor" class="flex-shrink-0 mt-1" viewBox="0 0 16 16">
+                        <path d="M8 15A7 7 0 1 1 8 1a7 7 0 0 1 0 14zm0 1A8 8 0 1 0 8 0a8 8 0 0 0 0 16z"/>
+                        <path d="M7.002 11a1 1 0 1 1 2 0 1 1 0 0 1-2 0zM7.1 4.995a.905.905 0 1 1 1.8 0l-.35 3.507a.552.552 0 0 1-1.1 0L7.1 4.995z"/>
+                    </svg>
+                    <div>
+                        <strong>Serverfehler.</strong><br />
+                        <span style="font-size:0.85rem;">Ein unerwarteter Fehler ist aufgetreten. Bitte versuchen Sie es später erneut.</span>
+                    </div>
+                </div>
+            }
+
+            <div class="mb-4">
+                <label class="form-label fw-medium" for="login-access-code">
+                    Zugangscode
+                    <span class="text-danger ms-1">*</span>
+                </label>
+                <div class="input-group">
+                    <span class="input-group-text bg-light border-end-0">
+                        <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="#6c757d" viewBox="0 0 16 16">
+                            <path d="M3.5 11.5a3.5 3.5 0 1 1 3.163-5H14L15.5 8 14 9.5l-1-1-1 1-1-1-1 1-1-1-1.837 1.337A3.5 3.5 0 0 1 3.5 11.5zm0-1a2.5 2.5 0 1 0 0-5 2.5 2.5 0 0 0 0 5z"/>
+                        </svg>
+                    </span>
+                    <input id="login-access-code"
+                           type="@(ShowCode ? "text" : "password")"
+                           class="form-control border-start-0 border-end-0 @(LoginResult == EnvelopeLoginResult.InvalidCode ? "is-invalid" : null)"
+                           placeholder="Zugangscode eingeben"
+                           @bind="AccessCode"
+                           @bind:event="oninput"
+                           @onkeydown="OnKeyDownAsync"
+                           disabled="@IsLoading"
+                           autocomplete="one-time-code" />
+                    <button type="button"
+                            class="btn btn-outline-secondary border-start-0"
+                            style="border-left: none;"
+                            tabindex="-1"
+                            @onclick="() => ShowCode = !ShowCode">
+                        @if (ShowCode) {
+                            <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" viewBox="0 0 16 16">
+                                <path d="M13.359 11.238C15.06 9.72 16 8 16 8s-3-5.5-8-5.5a7.028 7.028 0 0 0-2.79.588l.77.771A5.944 5.944 0 0 1 8 3.5c2.12 0 3.879 1.168 5.168 2.457A13.134 13.134 0 0 1 14.828 8c-.058.087-.122.183-.195.288-.335.48-.83 1.12-1.465 1.755-.165.165-.337.328-.517.486l.708.709z"/>
+                                <path d="M11.297 9.176a3.5 3.5 0 0 0-4.474-4.474l.823.823a2.5 2.5 0 0 1 2.829 2.829l.822.822zm-2.943 1.299.822.822a3.5 3.5 0 0 1-4.474-4.474l.823.823a2.5 2.5 0 0 0 2.829 2.829z"/>
+                                <path d="M3.35 5.47c-.18.16-.353.322-.518.487A13.134 13.134 0 0 0 1.172 8l.195.288c.335.48.83 1.12 1.465 1.755C4.121 11.332 5.881 12.5 8 12.5c.716 0 1.39-.133 2.02-.36l.77.772A7.029 7.029 0 0 1 8 13.5C3 13.5 0 8 0 8s.939-1.721 2.641-3.238l.708.709z"/>
+                                <path fill-rule="evenodd" d="M13.646 14.354l-12-12 .708-.708 12 12-.708.708z"/>
+                            </svg>
+                        } else {
+                            <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" viewBox="0 0 16 16">
+                                <path d="M16 8s-3-5.5-8-5.5S0 8 0 8s3 5.5 8 5.5S16 8 16 8zM1.173 8a13.133 13.133 0 0 1 1.66-2.043C4.12 4.668 5.88 3.5 8 3.5c2.12 0 3.879 1.168 5.168 2.457A13.133 13.133 0 0 1 14.828 8c-.058.087-.122.183-.195.288-.335.48-.83 1.12-1.465 1.755C11.879 11.332 10.119 12.5 8 12.5c-2.12 0-3.879-1.168-5.168-2.457A13.134 13.134 0 0 1 1.172 8z"/>
+                                <path d="M8 5.5a2.5 2.5 0 1 0 0 5 2.5 2.5 0 0 0 0-5zM4.5 8a3.5 3.5 0 1 1 7 0 3.5 3.5 0 0 1-7 0z"/>
+                            </svg>
+                        }
+                    </button>
+                </div>
+            </div>
+
+            <button class="btn btn-primary w-100 py-2 fw-medium"
+                    style="background: linear-gradient(135deg, #2c3e50 0%, #3498db 100%); border: none;"
+                    @onclick="SubmitAsync"
+                    disabled="@(IsLoading || string.IsNullOrWhiteSpace(AccessCode))">
+                @if (IsLoading) {
+                    <span class="spinner-border spinner-border-sm me-2" role="status" aria-hidden="true"></span>
+                    <span>Überprüfen …</span>
+                } else {
+                    <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="me-2" viewBox="0 0 16 16">
+                        <path d="M8 1a2 2 0 0 1 2 2v4H6V3a2 2 0 0 1 2-2zm3 6V3a3 3 0 0 0-6 0v4a2 2 0 0 0-2 2v5a2 2 0 0 0 2 2h6a2 2 0 0 0 2-2V9a2 2 0 0 0-2-2z"/>
+                    </svg>
+                    <span>Dokument öffnen</span>
+                }
+            </button>
+
+        </div>
+
+        <div class="card-footer text-center text-muted py-3 border-0 bg-transparent" style="font-size: 0.78rem;">
+            Bei Problemen wenden Sie sich bitte an den Absender des Dokuments.
+        </div>
+
+    </div>
+</div>
+
+@code {
+    [Parameter] public string EnvelopeKey { get; set; } = string.Empty;
+
+    string AccessCode = string.Empty;
+    bool ShowCode;
+    bool IsLoading;
+    EnvelopeLoginResult? LoginResult;
+
+    async Task OnKeyDownAsync(Microsoft.AspNetCore.Components.Web.KeyboardEventArgs e) {
+        if (e.Key == "Enter")
+            await SubmitAsync();
+    }
+
+    async Task SubmitAsync() {
+        if (string.IsNullOrWhiteSpace(AccessCode) || IsLoading) return;
+
+        IsLoading = true;
+        LoginResult = null;
+        await InvokeAsync(StateHasChanged);
+
+        var result = await AuthService.LoginEnvelopeReceiverAsync(EnvelopeKey, AccessCode.Trim());
+
+        if (result == EnvelopeLoginResult.Success) {
+            Navigation.NavigateTo($"/envelope/{Uri.EscapeDataString(EnvelopeKey)}", forceLoad: true);
+            return;
+        }
+
+        LoginResult = result;
+        IsLoading = false;
+        await InvokeAsync(StateHasChanged);
+    }
+}
+

EnvelopeGenerator.ReceiverUI/Pages/ReportDesigner.razor

@@ -0,0 +1,19 @@
+@page "/sender"
+@using DevExpress.DataAccess.Json;
+@using EnvelopeGenerator.ReceiverUI.Services;
+
+<DxReportDesigner ReportName="LargeDatasetReport" CssClass="dx-blazor-reporting-container" Height="@null" Width="@null" AllowMDI="true" DataSources="DataSources">
+    <DxReportDesignerWizardSettings UseFullscreenWizard="true" />
+</DxReportDesigner>
+
+@code {
+    Dictionary<string, object> DataSources = new Dictionary<string, object>();
+    protected override async Task OnInitializedAsync() {
+        await base.OnInitializedAsync();
+        var connection = CustomDataSourceWizardJsonDataConnectionStorage.GetDefaultConnection();
+        JsonDataSource jsonDataSource = new JsonDataSource();
+        jsonDataSource.JsonSource = connection.GetJsonSource();
+        await jsonDataSource.FillAsync();
+        DataSources.Add("Northwind", jsonDataSource);
+    }
+}

EnvelopeGenerator.ReceiverUI/Pages/ReportViewer.razor

@@ -0,0 +1,735 @@
+@page "/receiver/{EnvelopeKey}"
+@page "/report-viewer/{EnvelopeKey}"
+@using System.Drawing
+@using DevExpress.Blazor
+@using DevExpress.Drawing
+@using DevExpress.Utils
+@using DevExpress.XtraPrinting
+@using DevExpress.XtraPrinting.Drawing
+@using Microsoft.JSInterop
+@using XtraReport = DevExpress.XtraReports.UI.XtraReport
+@using BottomMarginBand = DevExpress.XtraReports.UI.BottomMarginBand
+@using XRLabel = DevExpress.XtraReports.UI.XRLabel
+@using XRPictureBox = DevExpress.XtraReports.UI.XRPictureBox
+@using XRControl = DevExpress.XtraReports.UI.XRControl
+@using ImageSizeMode = DevExpress.XtraPrinting.ImageSizeMode
+@using EnvelopeGenerator.ReceiverUI.Services
+@using DevExpress.Blazor.Reporting
+@using Microsoft.Extensions.Options
+@using EnvelopeGenerator.ReceiverUI.Options
+@using EnvelopeGenerator.ReceiverUI.Models
+@implements IDisposable
+@inject IJSRuntime JSRuntime
+@inject AnnotationService AnnotationService
+@inject IOptions<ApiOptions> AppOptions
+@inject NavigationManager Navigation
+@inject InMemoryReportStorageWebExtension ReportStorage
+@inject EnvelopeGenerator.ReceiverUI.Services.DocumentService DocumentService
+@inject EnvelopeGenerator.ReceiverUI.Services.AuthService AuthService
+@inject EnvelopeGenerator.ReceiverUI.Services.EnvelopeReceiverService EnvelopeReceiverService
+
+<link href="_content/DevExpress.Blazor.Themes/blazing-berry.bs5.min.css" rel="stylesheet" />
+<link href="_content/DevExpress.Blazor.Reporting.Viewer/css/dx-blazor-reporting-components.bs5.css" rel="stylesheet" />
+
+<div class="receiver-page-layout">
+
+<div class="receiver-signature-panel">
+
+@* ?? Envelope info header ???????????????????????????????????????????????? *@
+@if (_envelopeReceiver is not null) {
+<div class="receiver-info-header">
+    <div class="receiver-info-header__gradient">
+        <div class="receiver-info-header__left">
+            <svg xmlns="http://www.w3.org/2000/svg" width="22" height="22" fill="currentColor" class="receiver-info-header__icon" viewBox="0 0 16 16">
+                <path d="M0 4a2 2 0 0 1 2-2h12a2 2 0 0 1 2 2v8a2 2 0 0 1-2 2H2a2 2 0 0 1-2-2V4Zm2-1a1 1 0 0 0-1 1v.217l7 4.2 7-4.2V4a1 1 0 0 0-1-1H2Zm13 2.383-4.708 2.825L15 11.105V5.383Zm-.034 6.876-5.64-3.471L8 9.583l-1.326-.795-5.64 3.47A1 1 0 0 0 2 13h12a1 1 0 0 0 .966-.741ZM1 11.105l4.708-2.897L1 5.383v5.722Z"/>
+            </svg>
+            <div>
+                <div class="receiver-info-header__title">@(_envelopeReceiver.Envelope?.Title ?? "Dokument")</div>
+                @if (!string.IsNullOrWhiteSpace(_envelopeReceiver.Envelope?.User?.FullName) || !string.IsNullOrWhiteSpace(_envelopeReceiver.Envelope?.User?.Email)) {
+                    <div class="receiver-info-header__sender">
+                        Von
+                        @if (!string.IsNullOrWhiteSpace(_envelopeReceiver.Envelope?.User?.FullName)) {
+                            <strong>@_envelopeReceiver.Envelope!.User!.FullName</strong>
+                        }
+                        @if (!string.IsNullOrWhiteSpace(_envelopeReceiver.Envelope?.User?.Email)) {
+                            <span class="opacity-75">&lt;@_envelopeReceiver.Envelope!.User!.Email&gt;</span>
+                        }
+                        &nbsp;&middot;&nbsp; @_envelopeReceiver.Envelope?.AddedWhen.ToString("dd.MM.yyyy")
+                    </div>
+                }
+            </div>
+        </div>
+        <div class="receiver-info-header__badges">
+            @if (!string.IsNullOrWhiteSpace(_envelopeReceiver.Name)) {
+                <span class="receiver-info-badge">
+                    <svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" fill="currentColor" class="me-1" viewBox="0 0 16 16">
+                        <path d="M8 8a3 3 0 1 0 0-6 3 3 0 0 0 0 6Zm2-3a2 2 0 1 1-4 0 2 2 0 0 1 4 0Zm4 8c0 1-1 1-1 1H3s-1 0-1-1 1-4 6-4 6 3 6 4Z"/>
+                    </svg>
+                    @_envelopeReceiver.Name
+                </span>
+            }
+            @if (!string.IsNullOrWhiteSpace(_envelopeReceiver.CompanyName)) {
+                <span class="receiver-info-badge">
+                    <svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" fill="currentColor" class="me-1" viewBox="0 0 16 16">
+                        <path d="M14.763.075A.5.5 0 0 1 15 .5v15a.5.5 0 0 1-.5.5h-3a.5.5 0 0 1-.5-.5V14h-1v1.5a.5.5 0 0 1-.5.5h-9a.5.5 0 0 1-.5-.5V10a.5.5 0 0 1 .342-.474L6 7.64V4.5a.5.5 0 0 1 .276-.447l8-4a.5.5 0 0 1 .487.022Z"/>
+                    </svg>
+                    @_envelopeReceiver.CompanyName
+                </span>
+            }
+            @if (!string.IsNullOrWhiteSpace(_envelopeReceiver.JobTitle)) {
+                <span class="receiver-info-badge receiver-info-badge--muted">@_envelopeReceiver.JobTitle</span>
+            }
+            @{
+                var docElements = _envelopeReceiver.Envelope?.Documents?.FirstOrDefault()?.Elements;
+                int sigCount = docElements?.Count() ?? _annotations.Count;
+            }
+            @if (sigCount > 0) {
+                <span class="receiver-info-badge receiver-info-badge--accent">
+                    <svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" fill="currentColor" class="me-1" viewBox="0 0 16 16">
+                        <path d="M12.146.146a.5.5 0 0 1 .708 0l3 3a.5.5 0 0 1 0 .708l-10 10a.5.5 0 0 1-.168.11l-5 2a.5.5 0 0 1-.65-.65l2-5a.5.5 0 0 1 .11-.168l10-10zM11.207 2.5 13.5 4.793 14.793 3.5 12.5 1.207 11.207 2.5zm1.586 3L10.5 3.207 4 9.707V10h.5a.5.5 0 0 1 .5.5v.5h.5a.5.5 0 0 1 .5.5v.5h.293l6.5-6.5zm-9.761 5.175-.106.106-1.528 3.821 3.821-1.528.106-.106A.5.5 0 0 1 5 12.5V12h-.5a.5.5 0 0 1-.5-.5V11h-.5a.5.5 0 0 1-.468-.325z"/>
+                    </svg>
+                    @sigCount @(sigCount == 1 ? "Unterschriftsfeld" : "Unterschriftsfelder")
+                </span>
+            }
+        </div>
+    </div>
+    @if (!string.IsNullOrWhiteSpace(_envelopeReceiver.Envelope?.Message)) {
+        <div class="receiver-info-message">@_envelopeReceiver.Envelope!.Message</div>
+    }
+    @if (!string.IsNullOrWhiteSpace(_envelopeReceiver.PrivateMessage)) {
+        <div class="receiver-info-private-message">
+            <svg xmlns="http://www.w3.org/2000/svg" width="13" height="13" fill="currentColor" class="me-1 flex-shrink-0" viewBox="0 0 16 16">
+                <path d="M8 1a2 2 0 0 1 2 2v4H6V3a2 2 0 0 1 2-2zm3 6V3a3 3 0 0 0-6 0v4a2 2 0 0 0-2 2v5a2 2 0 0 0 2 2h6a2 2 0 0 0 2-2V9a2 2 0 0 0-2-2z"/>
+            </svg>
+            @_envelopeReceiver.PrivateMessage
+        </div>
+    }
+</div>
+}
+
+@* ?? Signature action bar ???????????????????????????????????????????????? *@
+<div class="receiver-action-bar">
+    <div class="receiver-action-bar__inner">
+        <button class="btn btn-sm @(_capturedSignature is not null ? "btn-outline-success" : "btn-primary")" @onclick="OpenSignaturePopupAsync">
+            @if (_capturedSignature is not null) {
+                <svg xmlns="http://www.w3.org/2000/svg" width="13" height="13" fill="currentColor" class="me-1" viewBox="0 0 16 16">
+                    <path d="M13.854 3.646a.5.5 0 0 1 0 .708l-7 7a.5.5 0 0 1-.708 0l-3.5-3.5a.5.5 0 1 1 .708-.708L6.5 10.293l6.646-6.647a.5.5 0 0 1 .708 0z"/>
+                </svg>
+                <span>Unterschrift gespeichert</span>
+            } else {
+                <svg xmlns="http://www.w3.org/2000/svg" width="13" height="13" fill="currentColor" class="me-1" viewBox="0 0 16 16">
+                    <path d="M12.146.146a.5.5 0 0 1 .708 0l3 3a.5.5 0 0 1 0 .708l-10 10a.5.5 0 0 1-.168.11l-5 2a.5.5 0 0 1-.65-.65l2-5a.5.5 0 0 1 .11-.168l10-10zM11.207 2.5 13.5 4.793 14.793 3.5 12.5 1.207 11.207 2.5zm1.586 3L10.5 3.207 4 9.707V10h.5a.5.5 0 0 1 .5.5v.5h.5a.5.5 0 0 1 .5.5v.5h.293l6.5-6.5zm-9.761 5.175-.106.106-1.528 3.821 3.821-1.528.106-.106A.5.5 0 0 1 5 12.5V12h-.5a.5.5 0 0 1-.5-.5V11h-.5a.5.5 0 0 1-.468-.325z"/>
+                </svg>
+                <span>Unterschrift erstellen</span>
+            }
+        </button>
+
+        @if (_annotations.Count > 0 && !SignatureApplied) {
+            <div class="receiver-action-bar__progress">
+                <div class="progress" style="height:5px; min-width:70px; width:90px;">
+                    <div class="progress-bar @(_checkedAnnotations.Count == _annotations.Count ? "bg-success" : "bg-primary")"
+                         style="width:@(_annotations.Count > 0 ? (_checkedAnnotations.Count * 100 / _annotations.Count) : 0)%"
+                         role="progressbar"></div>
+                </div>
+                <span class="text-muted" style="font-size:0.75rem;">
+                    @_checkedAnnotations.Count&thinsp;/&thinsp;@_annotations.Count
+                    Seite@(AnnotationPages.Count() == 1 ? "" : "n")&nbsp;@string.Join(",", AnnotationPages)
+                </span>
+                @if (_capturedSignature is null) {
+                    <span class="text-muted fst-italic" style="font-size:0.72rem;">Zuerst Unterschrift erstellen</span>
+                } else if (_checkedAnnotations.Count == _annotations.Count) {
+                    <span class="text-success fw-semibold" style="font-size:0.72rem;">&#10003; Wird angewendet&hellip;</span>
+                }
+            </div>
+        }
+
+        @if (!string.IsNullOrWhiteSpace(SignatureValidationMessage)) {
+            <span class="text-danger" style="font-size:0.78rem;">@SignatureValidationMessage</span>
+        }
+        @if (SignatureApplied) {
+            <span class="text-success" style="font-size:0.78rem;">
+                <svg xmlns="http://www.w3.org/2000/svg" width="13" height="13" fill="currentColor" class="me-1" viewBox="0 0 16 16">
+                    <path d="M16 8A8 8 0 1 1 0 8a8 8 0 0 1 16 0zm-3.97-3.03a.75.75 0 0 0-1.08.022L7.477 9.417 5.384 7.323a.75.75 0 0 0-1.06 1.06L6.97 11.03a.75.75 0 0 0 1.079-.02l3.992-4.99a.75.75 0 0 0-.01-1.05z"/>
+                </svg>
+                Unterschrift angewendet
+            </span>
+        }
+
+        <div class="ms-auto d-flex align-items-center gap-2">
+            <button class="btn btn-sm btn-success" disabled="@(!SignatureApplied)" @onclick="ExportSignedPdfAsync">
+                <svg xmlns="http://www.w3.org/2000/svg" width="13" height="13" fill="currentColor" class="me-1" viewBox="0 0 16 16">
+                    <path d="M.5 9.9a.5.5 0 0 1 .5.5v2.5a1 1 0 0 0 1 1h12a1 1 0 0 0 1-1v-2.5a.5.5 0 0 1 1 0v2.5a2 2 0 0 1-2 2H2a2 2 0 0 1-2-2v-2.5a.5.5 0 0 1 .5-.5z"/>
+                    <path d="M7.646 11.854a.5.5 0 0 0 .708 0l3-3a.5.5 0 0 0-.708-.708L8.5 10.293V1.5a.5.5 0 0 0-1 0v8.793L5.354 8.146a.5.5 0 1 0-.708.708l3 3z"/>
+                </svg>
+                PDF exportieren
+            </button>
+            @if (!string.IsNullOrWhiteSpace(EnvelopeKey)) {
+                <button class="btn btn-sm btn-outline-danger" @onclick="LogoutAsync" disabled="@IsLoggingOut" title="Abmelden">
+                    @if (IsLoggingOut) {
+                        <span class="spinner-border spinner-border-sm" role="status" aria-hidden="true"></span>
+                    } else {
+                        <svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" fill="currentColor" viewBox="0 0 16 16">
+                            <path fill-rule="evenodd" d="M10 12.5a.5.5 0 0 1-.5.5h-8a.5.5 0 0 1-.5-.5v-9a.5.5 0 0 1 .5-.5h8a.5.5 0 0 1 .5.5v2a.5.5 0 0 0 1 0v-2A1.5 1.5 0 0 0 9.5 2h-8A1.5 1.5 0 0 0 0 3.5v9A1.5 1.5 0 0 0 1.5 14h8a1.5 1.5 0 0 0 1.5-1.5v-2a.5.5 0 0 0-1 0v2z"/>
+                            <path fill-rule="evenodd" d="M15.854 8.354a.5.5 0 0 0 0-.708l-3-3a.5.5 0 0 0-.708.708L14.293 7.5H5.5a.5.5 0 0 0 0 1h8.793l-2.147 2.146a.5.5 0 0 0 .708.708l3-3z"/>
+                        </svg>
+                    }
+                </button>
+            }
+        </div>
+    </div>
+</div>
+
+</div>
+
+<DxPopup @bind-Visible="SignaturePopupVisible"
+HeaderText="Unterschrift erfassen"
+Width="620px"
+ShowFooter="true"
+CloseOnEscape="false"
+ShowCloseButton="false"
+CloseOnOutsideClick="false"
+Shown="OnPopupShownAsync">
+    <BodyContentTemplate>
+        <ul class="nav nav-tabs mb-3">
+            <li class="nav-item">
+                <button type="button" class="nav-link @(ActiveSignatureTab == SignatureTabDraw ? "active" : null)" @onclick="() => SetSignatureTabAsync(SignatureTabDraw)">Zeichnen</button>
+            </li>
+            <li class="nav-item">
+                <button type="button" class="nav-link @(ActiveSignatureTab == SignatureTabText ? "active" : null)" @onclick="() => SetSignatureTabAsync(SignatureTabText)">Text</button>
+            </li>
+            <li class="nav-item">
+                <button type="button" class="nav-link @(ActiveSignatureTab == SignatureTabImage ? "active" : null)" @onclick="() => SetSignatureTabAsync(SignatureTabImage)">Bild</button>
+            </li>
+        </ul>
+
+        @if(ActiveSignatureTab == SignatureTabDraw) {
+            <p class="text-muted mb-2">Bitte unterschreiben Sie im folgenden Feld.</p>
+            <canvas id="receiver-signature-pad" width="520" height="160" class="border rounded bg-white w-100" style="max-width: 520px; touch-action: none;"></canvas>
+        } else if(ActiveSignatureTab == SignatureTabText) {
+            <p class="text-muted mb-2">Geben Sie Ihre Unterschrift als Text ein und waehlen Sie eine Schriftart.</p>
+            <div class="row g-2 mb-2">
+                <div class="col-12 col-md-7">
+                    <input class="form-control" placeholder="Ihre Unterschrift" value="@TypedSignatureText" @oninput="OnTypedSignatureChanged" />
+                </div>
+                <div class="col-12 col-md-5">
+                    <select class="form-select" value="@TypedSignatureFont" @onchange="OnTypedSignatureFontChanged">
+                        @foreach(var font in TypedSignatureFonts) {
+                            <option value="@font.Value" style="font-family: @font.Value">@font.Text</option>
+                        }
+                    </select>
+                </div>
+            </div>
+            <canvas id="receiver-typed-signature-pad" width="520" height="160" class="border rounded bg-white w-100" style="max-width: 520px;"></canvas>
+        } else {
+            <p class="text-muted mb-2">Laden Sie ein Bild Ihrer Unterschrift hoch.</p>
+            <input id="receiver-signature-image-input" class="form-control mb-2" type="file" accept="image/png,image/jpeg,image/webp" />
+            <canvas id="receiver-image-signature-pad" width="520" height="160" class="border rounded bg-white w-100" style="max-width: 520px;"></canvas>
+        }
+
+
+        <div class="border-top mt-3 pt-3">
+            <p class="text-muted mb-2">Bitte geben Sie die folgenden Angaben ein. Das Datum wird automatisch hinzugefuegt.</p>
+            <div class="row g-2">
+                <div class="col-12 col-md-6">
+                    <label class="form-label" for="receiver-signer-name">Vor- und Nachname *</label>
+                    <input id="receiver-signer-name" class="form-control" value="@SignerFullName" @oninput="args => SignerFullName = args.Value?.ToString() ?? string.Empty" />
+                </div>
+                <div class="col-12 col-md-6">
+                    <label class="form-label" for="receiver-signer-position">Position</label>
+                    <input id="receiver-signer-position" class="form-control" value="@SignerPosition" @oninput="args => SignerPosition = args.Value?.ToString() ?? string.Empty" />
+                </div>
+                <div class="col-12 col-md-6">
+                    <label class="form-label" for="receiver-signature-place">Ort *</label>
+                    <input id="receiver-signature-place" class="form-control" value="@SignaturePlace" @oninput="args => SignaturePlace = args.Value?.ToString() ?? string.Empty" />
+                </div>
+            </div>
+        </div>
+
+        @if(!string.IsNullOrWhiteSpace(PopupValidationMessage)) {
+            <div class="text-danger mt-2">@PopupValidationMessage</div>
+        }
+    </BodyContentTemplate>
+    <FooterContentTemplate>
+        <div class="d-flex gap-2 flex-wrap justify-content-end w-100">
+            <button class="btn btn-outline-secondary" @onclick="RenewSignatureAsync">Unterschrift erneuern</button>
+            <button class="btn btn-primary" @onclick="SaveSignatureAsync">Speichern</button>
+        </div>
+    </FooterContentTemplate>
+</DxPopup>
+
+<div class="receiver-viewer-wrapper">
+@if(Report is not null) {
+    <DxReportViewer @key="ViewerKey" @ref="reportViewer" Report="Report" RootCssClasses="w-100 h-100" Zoom="1.3" />
+}
+</div>
+
+</div>
+
+@code {
+
+    const string SignatureTabDraw = "draw";
+    const string SignatureTabText = "text";
+    const string SignatureTabImage = "image";
+    const string DrawCanvasId = "receiver-signature-pad";
+    const string TypedCanvasId = "receiver-typed-signature-pad";
+    const string ImageInputId = "receiver-signature-image-input";
+    const string ImageCanvasId = "receiver-image-signature-pad";
+
+    readonly (string Text, string Value)[] TypedSignatureFonts = {
+    ("Brush Script", "'Brush Script MT', cursive"),
+    ("Segoe Script", "'Segoe Script', cursive"),
+    ("Lucida Handwriting", "'Lucida Handwriting', cursive"),
+    ("Comic Sans", "'Comic Sans MS', cursive"),
+    ("Cursive", "cursive")
+};
+
+    [Parameter] public string EnvelopeKey { get; set; } = string.Empty;
+
+    DxReportViewer? reportViewer;
+    XtraReport? Report;
+    bool SignatureApplied;
+    bool SignaturePopupVisible;
+    string? SignatureValidationMessage;
+    string? PopupValidationMessage;
+    string ActiveSignatureTab = SignatureTabDraw;
+    string TypedSignatureText = string.Empty;
+    string TypedSignatureFont = "'Brush Script MT', cursive";
+    string SignerFullName = string.Empty;
+    string SignerPosition = string.Empty;
+    string SignaturePlace = string.Empty;
+    int ViewerKey;
+    bool IsLoggingOut;
+
+    IReadOnlyList<AnnotationDto> _annotations = [];
+    IEnumerable<int> AnnotationPages => _annotations.Select(a => a.Page).Distinct().OrderBy(p => p);
+    EnvelopeReceiverDto? _envelopeReceiver;
+    record SignatureCapture(string DataUrl, string FullName, string Position, string Place);
+    SignatureCapture? _capturedSignature;
+    byte[]? _basePdfBytes;
+    // annotation IDs the user has checked via overlay checkboxes
+    readonly HashSet<long> _checkedAnnotations = [];
+    DotNetObjectReference<ReportViewer>? _dotNetRef;
+    int _lastOverlayViewerKey = -1;
+
+    async Task LogoutAsync() {
+        if (string.IsNullOrWhiteSpace(EnvelopeKey) || IsLoggingOut) return;
+        IsLoggingOut = true;
+        await InvokeAsync(StateHasChanged);
+        await AuthService.LogoutEnvelopeReceiverAsync(EnvelopeKey);
+        Navigation.NavigateTo($"/login/{Uri.EscapeDataString(EnvelopeKey)}", forceLoad: true);
+    }
+
+    protected override async Task OnInitializedAsync() {
+
+        // ? REDIRECT: /receiver/{key} -> /envelope/{key} (NEW PDF.js viewer)
+        if (!string.IsNullOrWhiteSpace(EnvelopeKey)) {
+            Navigation.NavigateTo($"/envelope/{Uri.EscapeDataString(EnvelopeKey)}", forceLoad: false);
+            return;
+        }
+
+        if (!string.IsNullOrWhiteSpace(EnvelopeKey)) {
+            var hasAccess = await AuthService.CheckEnvelopeAccessAsync(EnvelopeKey);
+            if (!hasAccess) {
+                Navigation.NavigateTo($"/login/{Uri.EscapeDataString(EnvelopeKey)}");
+                return;
+            }
+            else
+            {
+                ActiveSignatureTab = SignatureTabDraw;
+                SignaturePopupVisible = true;
+                SignatureValidationMessage = null;
+                PopupValidationMessage = null;
+            }
+        }
+
+        _annotations = await AnnotationService.GetAnnotationsAsync(EnvelopeKey ?? "fake");
+        _envelopeReceiver = await EnvelopeReceiverService.GetAsync(EnvelopeKey ?? "fake");
+
+        if (!AppOptions.Value.ForceToUseFakeDocument && !string.IsNullOrWhiteSpace(EnvelopeKey)) {
+            var (pdfBytes, _) = await DocumentService.GetDocumentAsync(EnvelopeKey);
+            if (pdfBytes is { Length: > 0 })
+                _basePdfBytes = pdfBytes;
+        }
+
+        var initialReport = BuildFreshBaseReport();
+        Report = initialReport;
+    }
+
+    protected override async Task OnAfterRenderAsync(bool firstRender) {
+        if (firstRender)
+            _dotNetRef = DotNetObjectReference.Create(this);
+
+
+        if (Report is not null && _annotations.Count > 0
+            && _capturedSignature is not null && !SignatureApplied
+            && _lastOverlayViewerKey != ViewerKey) {
+            _lastOverlayViewerKey = ViewerKey;
+            await JSRuntime.InvokeVoidAsync(
+                "receiverSignature.installAnnotationCheckboxes",
+                _annotations, _checkedAnnotations.ToArray(), _dotNetRef);
+        }
+    }
+
+    [JSInvokable]
+    public async Task OnAnnotationToggled(long annotationId, bool isChecked) {
+        if (isChecked)
+            _checkedAnnotations.Add(annotationId);
+        else
+            _checkedAnnotations.Remove(annotationId);
+        await InvokeAsync(StateHasChanged);
+
+        if (_capturedSignature is not null
+            && !SignatureApplied
+            && _annotations.Count > 0
+            && _checkedAnnotations.Count == _annotations.Count) {
+            // K?sa bekleme: kullan?c? son tick'in görsel feedback'ini görsün
+            await Task.Delay(400);
+            await SubmitSignaturesAsync();
+        }
+    }
+
+    void OpenSignaturePopupAsync() {
+        ActiveSignatureTab = SignatureTabDraw;
+        SignaturePopupVisible = true;
+        SignatureValidationMessage = null;
+        PopupValidationMessage = null;
+    }
+
+    async Task OnPopupShownAsync() {
+        await InitializeActiveSignatureTabAsync();
+    }
+
+    async Task SetSignatureTabAsync(string tab) {
+        ActiveSignatureTab = tab;
+        PopupValidationMessage = null;
+        await InvokeAsync(StateHasChanged);
+        await Task.Delay(50);
+        await InitializeActiveSignatureTabAsync();
+    }
+
+    async Task InitializeActiveSignatureTabAsync() {
+        if(ActiveSignatureTab == SignatureTabDraw) {
+            await JSRuntime.InvokeVoidAsync("receiverSignature.initialize", DrawCanvasId);
+        } else if(ActiveSignatureTab == SignatureTabText) {
+            await JSRuntime.InvokeVoidAsync("receiverSignature.initializeTyped", TypedCanvasId);
+            await RenderTypedSignatureAsync();
+        } else {
+            await JSRuntime.InvokeVoidAsync("receiverSignature.initializeImage", ImageInputId, ImageCanvasId);
+        }
+    }
+
+    async Task RenewSignatureAsync() {
+        PopupValidationMessage = null;
+
+        if(ActiveSignatureTab == SignatureTabDraw) {
+            await JSRuntime.InvokeVoidAsync("receiverSignature.clear", DrawCanvasId);
+        } else if(ActiveSignatureTab == SignatureTabText) {
+            TypedSignatureText = string.Empty;
+            await JSRuntime.InvokeVoidAsync("receiverSignature.clearTyped", TypedCanvasId);
+        } else {
+            await JSRuntime.InvokeVoidAsync("receiverSignature.clearImage", ImageInputId, ImageCanvasId);
+        }
+    }
+
+    void CloseSignaturePopup() {
+        PopupValidationMessage = null;
+        SignaturePopupVisible = false;
+    }
+
+    async Task OnTypedSignatureChanged(Microsoft.AspNetCore.Components.ChangeEventArgs args) {
+        TypedSignatureText = args.Value?.ToString() ?? string.Empty;
+        await RenderTypedSignatureAsync();
+    }
+
+    async Task OnTypedSignatureFontChanged(Microsoft.AspNetCore.Components.ChangeEventArgs args) {
+        TypedSignatureFont = args.Value?.ToString() ?? TypedSignatureFont;
+        await RenderTypedSignatureAsync();
+    }
+
+    async Task RenderTypedSignatureAsync() {
+        await JSRuntime.InvokeVoidAsync("receiverSignature.renderTypedSignature", TypedCanvasId, TypedSignatureText, TypedSignatureFont);
+    }
+
+    async Task SaveSignatureAsync() {
+        if (string.IsNullOrWhiteSpace(SignerFullName)) {
+            PopupValidationMessage = "Bitte geben Sie Vor- und Nachname ein.";
+            return;
+        }
+        if (string.IsNullOrWhiteSpace(SignaturePlace)) {
+            PopupValidationMessage = "Bitte geben Sie den Ort ein.";
+            return;
+        }
+        var signatureDataUrl = await GetActiveSignatureDataUrlAsync();
+        if (string.IsNullOrWhiteSpace(signatureDataUrl)) {
+            PopupValidationMessage = "Die Unterschrift ist fuer den PDF-Export erforderlich.";
+            return;
+        }
+
+        PopupValidationMessage = null;
+        SignatureValidationMessage = null;
+        _capturedSignature = new(signatureDataUrl, SignerFullName.Trim(), SignerPosition.Trim(), SignaturePlace.Trim());
+
+        // If no annotations, apply immediately (no checkbox step needed)
+        if (_annotations.Count == 0) {
+            var freshReport = BuildFreshBaseReport();
+            AddSignature(freshReport, _capturedSignature.DataUrl, _capturedSignature.FullName, _capturedSignature.Position, _capturedSignature.Place);
+            Report = freshReport;
+            SignatureApplied = true;
+            SignaturePopupVisible = false;
+            ViewerKey++;
+            return;
+        }
+
+        // Close popup; checkboxes will appear on the PDF via OnAfterRenderAsync
+        SignaturePopupVisible = false;
+        _lastOverlayViewerKey = -1; // force overlay reinstall
+        await InvokeAsync(StateHasChanged);
+    }
+
+    async Task SubmitSignaturesAsync() {
+        if (_checkedAnnotations.Count == 0) {
+            SignatureValidationMessage = "Bitte markieren Sie mindestens ein Unterschriftsfeld im Dokument.";
+            return;
+        }
+        if (_checkedAnnotations.Count < _annotations.Count) {
+            SignatureValidationMessage = $"Bitte markieren Sie alle {_annotations.Count} Unterschriftsfelder. Noch {_annotations.Count - _checkedAnnotations.Count} offen.";
+            return;
+        }
+
+        SignatureValidationMessage = null;
+        var freshReport = BuildFreshBaseReport();
+        foreach (var ann in _annotations)
+            AddSignatureAtAnnotation(freshReport, ann, _capturedSignature!.DataUrl, _capturedSignature.FullName, _capturedSignature.Position, _capturedSignature.Place);
+
+        Report = freshReport;
+        SignatureApplied = true;
+        ViewerKey++;
+        await InvokeAsync(StateHasChanged);
+    }
+
+    async Task<string?> GetActiveSignatureDataUrlAsync() {
+        if(ActiveSignatureTab == SignatureTabDraw)
+            return await JSRuntime.InvokeAsync<string?>("receiverSignature.getDataUrl", DrawCanvasId);
+
+        if(ActiveSignatureTab == SignatureTabText) {
+            await RenderTypedSignatureAsync();
+            return await JSRuntime.InvokeAsync<string?>("receiverSignature.getTypedDataUrl", TypedCanvasId);
+        }
+
+        return await JSRuntime.InvokeAsync<string?>("receiverSignature.getImageDataUrl", ImageCanvasId);
+    }
+
+    async Task ExportSignedPdfAsync() {
+        if(!SignatureApplied || Report is null) {
+            SignatureValidationMessage = "Bitte fuegen Sie die Unterschrift zuerst zum Bericht hinzu.";
+            return;
+        }
+
+        try {
+            SignatureValidationMessage = null;
+            await reportViewer!.ExportToAsync(ExportFormat.Pdf);
+        } catch(Exception) {
+            SignatureValidationMessage = "Das signierte PDF konnte nicht exportiert werden. Bitte laden Sie die Seite neu und versuchen Sie es erneut.";
+        }
+    }
+
+    XtraReport BuildFreshBaseReport() {
+        if (_basePdfBytes is { Length: > 0 }) {
+            var report = new XtraReport();
+            var detail = new DevExpress.XtraReports.UI.DetailBand();
+            report.Bands.Add(detail);
+            detail.Controls.Add(new DevExpress.XtraReports.UI.XRPdfContent { Source = _basePdfBytes, GenerateOwnPages = true });
+            return report;
+        }
+        return CreateReportInstance();
+    }
+
+    static void AddAnnotationPlaceholders(XtraReport report, IReadOnlyList<AnnotationDto> annotations) {
+        var bottomMargin = report.Bands.OfType<BottomMarginBand>().FirstOrDefault();
+        if (bottomMargin is null) {
+            bottomMargin = new BottomMarginBand();
+            report.Bands.Add(bottomMargin);
+        }
+
+        const float sigWidth      = 230F;
+        const float sigHeight     = 154F;
+        const float bottomPad     = 6F;
+        const float defaultTopPad = 8F;
+        const float maxBandHeight = 210F;
+
+        float requiredHeight = defaultTopPad + sigHeight + bottomPad;
+        bottomMargin.HeightF = Math.Min(maxBandHeight, Math.Max(bottomMargin.HeightF, requiredHeight));
+        float topPad = Math.Max(0F, bottomMargin.HeightF - bottomPad - sigHeight);
+
+        foreach (var ann in annotations) {
+            float sigX  = (float)(ann.X);
+            var annotId = ann.Id.ToString();
+
+            var placeholder = new XRLabel {
+                Name          = $"receiverSignaturePlaceholder_{annotId}",
+                Text          = "\u270e Bitte unterschreiben",
+                BoundsF       = new RectangleF(sigX, topPad, sigWidth, sigHeight),
+                Borders       = BorderSide.All,
+                BorderColor   = System.Drawing.Color.FromArgb(230, 81, 0),
+                BackColor     = System.Drawing.Color.FromArgb(30, 255, 236, 153),
+                Font          = new DXFont("Open Sans", 10F, DXFontStyle.Regular),
+                ForeColor     = System.Drawing.Color.FromArgb(94, 38, 0),
+                TextAlignment = TextAlignment.MiddleCenter
+            };
+
+            bottomMargin.Controls.Add(placeholder);
+        }
+    }
+
+    XtraReport CreateReportInstance() {
+        return ReportStorage.TryGetReport("LargeDatasetReport", out var savedReport)
+            ? savedReport
+            : PredefinedReports.ReportsFactory.GetReport("LargeDatasetReport");
+    }
+
+    static void AddSignature(XtraReport report, string signatureDataUrl, string signerFullName, string signerPosition, string signaturePlace) {
+        var imageBytes = Convert.FromBase64String(signatureDataUrl[(signatureDataUrl.IndexOf(',') + 1)..]);
+        using var imageStream = new MemoryStream(imageBytes);
+        var imageSource = new ImageSource(DXImage.FromStream(imageStream));
+        var bottomMargin = report.Bands.OfType<BottomMarginBand>().FirstOrDefault();
+
+        if(bottomMargin is null) {
+            bottomMargin = new BottomMarginBand();
+            report.Bands.Add(bottomMargin);
+        }
+
+        RemoveExistingSignature(bottomMargin);
+
+        // Layout constants
+        const float sigX         = 390F;
+        const float sigWidth     = 230F;
+        const float sigImgHeight = 70F;
+        const float infoHeight   = 65F;  // up to 4 lines at 8pt
+        const float innerGap     = 5F;
+        const float bottomPad    = 6F;
+        const float defaultTopPad = 8F;
+        const float maxBandHeight = 210F;
+
+        float requiredHeight = defaultTopPad + sigImgHeight + innerGap + infoHeight + bottomPad;
+
+        // Grow band if needed, but cap at maxBandHeight to avoid overlapping page content
+        bottomMargin.HeightF = Math.Min(maxBandHeight, Math.Max(bottomMargin.HeightF, requiredHeight));
+
+        // If band is tighter than required, compress top padding so content still fits
+        float topPad = Math.Max(0F, bottomMargin.HeightF - bottomPad - infoHeight - innerGap - sigImgHeight);
+
+        float imageY = topPad;
+        float labelY = imageY + sigImgHeight + innerGap;
+
+        var signatureInformation = string.IsNullOrWhiteSpace(signerPosition)
+            ? $"{signerFullName}\n{signaturePlace}, {DateTime.Now:d}"
+            : $"{signerFullName}\n{signerPosition}\n{signaturePlace}, {DateTime.Now:d}";
+
+        var signature = new XRPictureBox {
+            Name = "receiverSignatureImage",
+            ImageSource = imageSource,
+            BoundsF = new RectangleF(sigX, imageY, sigWidth, sigImgHeight),
+            Sizing = ImageSizeMode.ZoomImage,
+            Borders = BorderSide.Bottom,
+            BorderColor = System.Drawing.Color.FromArgb(73, 80, 87)
+        };
+
+        var signatureLabel = new XRLabel {
+            Name = "receiverSignatureLabel",
+            Text = signatureInformation,
+            Multiline = true,
+            BoundsF = new RectangleF(sigX, labelY, sigWidth, infoHeight),
+            Font = new DXFont("Open Sans", 8F, DXFontStyle.Regular),
+            ForeColor = System.Drawing.Color.FromArgb(73, 80, 87),
+            TextAlignment = TextAlignment.TopLeft
+        };
+
+        bottomMargin.Controls.AddRange(new XRControl[] { signature, signatureLabel });
+    }
+
+    static void RemoveExistingSignature(BottomMarginBand bottomMargin) {
+        var controls = bottomMargin.Controls
+            .Cast<XRControl>()
+            .Where(control => control.Name is "receiverSignatureLabel" or "receiverSignatureImage")
+            .ToArray();
+
+        foreach(var control in controls)
+            bottomMargin.Controls.Remove(control);
+    }
+
+    static void AddSignatureAtAnnotation(XtraReport report, AnnotationDto? annotation, string signatureDataUrl, string signerFullName, string signerPosition, string signaturePlace) {
+        var imageBytes = Convert.FromBase64String(signatureDataUrl[(signatureDataUrl.IndexOf(',') + 1)..]);
+        using var imageStream = new MemoryStream(imageBytes);
+        var imageSource = new ImageSource(DXImage.FromStream(imageStream));
+
+        var detail = report.Bands.OfType<DevExpress.XtraReports.UI.DetailBand>().FirstOrDefault();
+        if (detail is null) return;
+
+        var annotId = annotation?.Id.ToString() ?? "0";
+        RemoveExistingSignatureById(detail, annotId);
+
+        const float sigWidth     = 230F;
+        const float sigImgHeight = 70F;
+        const float infoHeight   = 48.75F;
+        const float innerGap     = 5F;
+
+        float sigX   = (float)(annotation?.X ?? 390.0);
+        float imageY = (float)(annotation?.Y ?? 900.0);
+        float labelY = imageY + sigImgHeight + innerGap;
+        int targetPage = annotation?.Page ?? 1;
+
+        var signatureInformation = string.IsNullOrWhiteSpace(signerPosition)
+            ? $"{signerFullName}\n{signaturePlace}, {DateTime.Now:d}"
+            : $"{signerFullName}\n{signerPosition}\n{signaturePlace}, {DateTime.Now:d}";
+
+        var signature = new XRPictureBox {
+            Name        = $"receiverSignatureImage_{annotId}",
+            ImageSource = imageSource,
+            BoundsF     = new RectangleF(sigX, imageY, sigWidth, sigImgHeight),
+            Sizing      = ImageSizeMode.ZoomImage,
+            Borders     = BorderSide.Bottom,
+            BorderColor = System.Drawing.Color.FromArgb(73, 80, 87),
+            BackColor = Color.FromArgb(219, 219, 219)
+        };
+
+        var signatureLabel = new XRLabel {
+            Name          = $"receiverSignatureLabel_{annotId}",
+            Text          = signatureInformation,
+            Multiline     = true,
+            BoundsF       = new RectangleF(sigX, labelY - 5, sigWidth, infoHeight),
+            Font          = new DXFont("Open Sans", 8F, DXFontStyle.Regular),
+            ForeColor     = System.Drawing.Color.FromArgb(73, 80, 87),
+            TextAlignment = TextAlignment.TopCenter,
+            BackColor = Color.FromArgb(219, 219, 219)
+        };
+
+        // Show each control only on the target page using an independent print counter
+        int sigPrintCount = 0;
+        signature.BeforePrint += (_, e) => {
+            sigPrintCount++;
+            e.Cancel = sigPrintCount != targetPage;
+        };
+
+        int lblPrintCount = 0;
+        signatureLabel.BeforePrint += (_, e) => {
+            lblPrintCount++;
+            e.Cancel = lblPrintCount != targetPage;
+        };
+
+        detail.Controls.AddRange(new XRControl[] { signature, signatureLabel });
+    }
+
+    static void RemoveExistingSignatureById(DevExpress.XtraReports.UI.DetailBand detail, string annotId) {
+        var controls = detail.Controls
+            .Cast<XRControl>()
+            .Where(c => c.Name == $"receiverSignatureImage_{annotId}" || c.Name == $"receiverSignatureLabel_{annotId}")
+            .ToArray();
+        foreach (var c in controls)
+            detail.Controls.Remove(c);
+    }
+
+    public void Dispose() {
+        _dotNetRef?.Dispose();
+    }
+}
+

EnvelopeGenerator.ReceiverUI/Pages/TestViewer.razor

@@ -0,0 +1,81 @@
+@page "/test"
+@using System.Drawing
+@using DevExpress.Drawing
+@using DevExpress.Utils
+@using DevExpress.XtraPrinting
+@using DevExpress.XtraPrinting.Drawing
+@using XtraReport = DevExpress.XtraReports.UI.XtraReport
+@using BottomMarginBand = DevExpress.XtraReports.UI.BottomMarginBand
+@using XRLabel = DevExpress.XtraReports.UI.XRLabel
+@using XRPictureBox = DevExpress.XtraReports.UI.XRPictureBox
+@using XRControl = DevExpress.XtraReports.UI.XRControl
+@using ImageSizeMode = DevExpress.XtraPrinting.ImageSizeMode
+@using EnvelopeGenerator.ReceiverUI.Services
+@using DevExpress.Blazor.Reporting
+@inject IJSRuntime JSRuntime
+@inject InMemoryReportStorageWebExtension ReportStorage
+@inject EnvelopeGenerator.ReceiverUI.Services.DocumentService DocumentService
+@inject Microsoft.Extensions.Configuration.IConfiguration Configuration
+@inject HttpClient Http
+@using System;
+
+<link href="_content/DevExpress.Blazor.Themes/blazing-berry.bs5.min.css" rel="stylesheet" />
+<link href="_content/DevExpress.Blazor.Reporting.Viewer/css/dx-blazor-reporting-components.bs5.css" rel="stylesheet" />
+
+<div class="receiver-page-layout">
+
+<div class="receiver-viewer-wrapper">
+        <embed class="w-100 h-50" src="/docs/Document.pdf" type="application/pdf" />
+        @if (PdfBytes is { Length: > 0 }) {
+            <DxPdfViewer DocumentContent="PdfBytes" CssClass="w-100 h-50" />
+        }
+        else{
+            <div>Not found</div>
+        }
+</div>
+
+</div>
+
+@code {
+
+    const string SignatureTabDraw = "draw";
+    const string SignatureTabText = "text";
+    const string SignatureTabImage = "image";
+    const string DrawCanvasId = "receiver-signature-pad";
+    const string TypedCanvasId = "receiver-typed-signature-pad";
+    const string ImageInputId = "receiver-signature-image-input";
+    const string ImageCanvasId = "receiver-image-signature-pad";
+
+    readonly (string Text, string Value)[] TypedSignatureFonts = {
+        ("Brush Script", "'Brush Script MT', cursive"),
+        ("Segoe Script", "'Segoe Script', cursive"),
+        ("Lucida Handwriting", "'Lucida Handwriting', cursive"),
+        ("Comic Sans", "'Comic Sans MS', cursive"),
+        ("Cursive", "cursive")
+    };
+
+    [Parameter] public string? EnvelopeKey { get; set; }
+
+    DxReportViewer? reportViewer;
+    XtraReport? Report;
+    string PdfViewerUrl = string.Empty;
+    byte[]? PdfBytes;
+    byte[]? SignedPdfBytes;
+    bool SignatureApplied;
+    bool SignaturePopupVisible;
+    string? PopupValidationMessage;
+    string ActiveSignatureTab = SignatureTabDraw;
+    string TypedSignatureText = string.Empty;
+    string TypedSignatureFont = "'Brush Script MT', cursive";
+    string SignerFullName = string.Empty;
+    string SignerPosition = string.Empty;
+    string SignaturePlace = string.Empty;
+    int ViewerKey;
+
+    protected override async Task OnInitializedAsync() {
+        PdfBytes = await Http.GetByteArrayAsync("/docs/Document.pdf");
+    }
+
+
+}
+

EnvelopeGenerator.ReceiverUI/PredefinedReports/Report.resx

@@ -0,0 +1,123 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <metadata name="objectDataSource1.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
+    <value>17, 17</value>
+  </metadata>
+</root>

EnvelopeGenerator.ReceiverUI/PredefinedReports/ReportsFactory.cs

@@ -0,0 +1,14 @@
+using DevExpress.XtraReports.UI;
+
+namespace EnvelopeGenerator.ReceiverUI.PredefinedReports {
+    public static class ReportsFactory
+    {
+        public static readonly Dictionary<string, Func<XtraReport>> Reports = new() {
+            ["LargeDatasetReport"] = () => new PredefinedReports.Report()
+        };
+
+        public static XtraReport GetReport(string reportName) {
+            return Reports[reportName]();
+        }
+    }
+}

EnvelopeGenerator.ReceiverUI/Program.cs

@@ -0,0 +1,44 @@
+using Microsoft.AspNetCore.Components.WebAssembly.Hosting;
+using Microsoft.AspNetCore.Components.Web;
+using EnvelopeGenerator.ReceiverUI;
+using DevExpress.DataAccess.Web;
+using EnvelopeGenerator.ReceiverUI.Services;
+using EnvelopeGenerator.ReceiverUI.Options;
+using DevExpress.XtraReports.Services;
+using DevExpress.Blazor.Reporting;
+using DevExpress.XtraReports.Web.Extensions;
+
+var builder = WebAssemblyHostBuilder.CreateDefault(args);
+builder.RootComponents.Add<App>("#app");
+builder.RootComponents.Add<HeadOutlet>("head::after");
+builder.Services.AddScoped(sp => new HttpClient { BaseAddress = new Uri(builder.HostEnvironment.BaseAddress) });
+builder.Services.Configure<ApiOptions>(opts =>
+builder.Configuration.GetSection(ApiOptions.SectionName).Bind(opts));
+builder.Services.Configure<PdfViewerOptions>(opts =>
+builder.Configuration.GetSection(PdfViewerOptions.SectionName).Bind(opts));
+builder.Services.AddScoped<EnvelopeGenerator.ReceiverUI.Services.DocumentService>();
+builder.Services.AddScoped<EnvelopeGenerator.ReceiverUI.Services.AuthService>();
+builder.Services.AddScoped<EnvelopeGenerator.ReceiverUI.Services.AnnotationService>();
+builder.Services.AddScoped<EnvelopeGenerator.ReceiverUI.Services.EnvelopeReceiverService>();
+builder.Services.AddScoped<EnvelopeGenerator.ReceiverUI.Services.SignatureService>();
+builder.Services.AddSingleton<EnvelopeGenerator.ReceiverUI.Services.AppVersionService>();
+
+builder.Services.AddDevExpressWebAssemblyBlazorReportViewer();
+builder.Services.AddDevExpressWebAssemblyBlazorPdfViewer();
+
+builder.Services.AddDevExpressBlazorReportingWebAssembly(configure => {
+    configure.UseDevelopmentMode();
+});
+builder.Services.AddScoped<IDataSourceWizardJsonConnectionStorage, CustomDataSourceWizardJsonDataConnectionStorage>();
+builder.Services.AddScoped<IJsonDataConnectionProviderFactory, CustomJsonDataConnectionProviderFactory>();
+builder.Services.AddScoped<IObjectDataSourceWizardTypeProvider, ObjectDataSourceWizardCustomTypeProvider>();
+DevExpress.Utils.DeserializationSettings.RegisterTrustedClass(typeof(EnvelopeGenerator.ReceiverUI.Data.DataItemList));
+DevExpress.Utils.DeserializationSettings.RegisterTrustedClass(typeof(EnvelopeGenerator.ReceiverUI.PredefinedReports.Report));
+builder.Services.AddSingleton<InMemoryReportStorageWebExtension>();
+builder.Services.AddSingleton<ReportStorageWebExtension>(sp => sp.GetRequiredService<InMemoryReportStorageWebExtension>());
+builder.Services.AddScoped<IReportProviderAsync, CustomReportProvider>();
+ReportStorageWebExtension.RegisterExtensionGlobal(new InMemoryReportStorageWebExtension());
+
+var host = builder.Build();
+await FontLoader.LoadFonts(host.Services.GetRequiredService<HttpClient>(), new List<string> { "opensans.ttf" });
+await host.RunAsync();

EnvelopeGenerator.ReceiverUI/Properties/PublishProfiles/IISProfile.pubxml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- https://go.microsoft.com/fwlink/?LinkID=208121. -->
+<Project>
+  <PropertyGroup>
+    <WebPublishMethod>Package</WebPublishMethod>
+    <LastUsedBuildConfiguration>Release</LastUsedBuildConfiguration>
+    <LastUsedPlatform>Any CPU</LastUsedPlatform>
+    <SiteUrlToLaunchAfterPublish />
+    <LaunchSiteAfterPublish>true</LaunchSiteAfterPublish>
+    <ExcludeApp_Data>false</ExcludeApp_Data>
+    <ProjectGuid>fb2d306b-1042-4a70-31ed-f991a1599371</ProjectGuid>
+    <DesktopBuildPackageLocation>M:\App&amp;Service\0 DD - Smart UP\signFLOW\ReceiverUI\net8\$(Version)\EnvelopeGenerator.ReceiverUI.zip</DesktopBuildPackageLocation>
+    <PackageAsSingleFile>true</PackageAsSingleFile>
+    <DeployIisAppPath>EnvelopeGenerator.ReceiverUI</DeployIisAppPath>
+    <_TargetId>IISWebDeployPackage</_TargetId>
+  </PropertyGroup>
+</Project>

EnvelopeGenerator.ReceiverUI/Properties/launchSettings.json

@@ -0,0 +1,12 @@
+{
+  "profiles": {
+    "EnvelopeGenerator.ReceiverUI": {
+      "commandName": "Project",
+      "launchBrowser": true,
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      },
+      "applicationUrl": "https://localhost:52936;http://localhost:52937"
+    }
+  }
+}

EnvelopeGenerator.ReceiverUI/Services/AnnotationService.cs

@@ -0,0 +1,33 @@
+using System.Net.Http.Json;
+using System.Text.Json;
+using EnvelopeGenerator.ReceiverUI.Models;
+using EnvelopeGenerator.ReceiverUI.Options;
+using Microsoft.Extensions.Options;
+
+namespace EnvelopeGenerator.ReceiverUI.Services;
+
+/// <summary>
+/// Retrieves annotation positions from the API.
+/// The URL is composed as <c>{BaseUrl}/api/Annotation/{envelopeKey}</c>.
+/// During development, <c>BaseUrl</c> is empty so the request resolves to the
+/// YARP-proxied route on the same origin, which currently serves
+/// <c>fake-data/annotations.json</c>. To switch to real data, update the
+/// YARP route in <c>yarp.json</c> — no code change required.
+/// </summary>
+[Obsolete("Use SignatureService.")]
+public class AnnotationService(HttpClient http, IOptions<ApiOptions> apiOptions)
+{
+    private static readonly JsonSerializerOptions _jsonOptions = new(JsonSerializerDefaults.Web);
+
+    public async Task<IReadOnlyList<AnnotationDto>> GetAnnotationsAsync(string envelopeKey, CancellationToken cancel = default)
+    {
+        var url = $"{apiOptions.Value.BaseUrl}/api/Annotation/{Uri.EscapeDataString(envelopeKey)}";
+        var response = await http.GetAsync(url, cancel);
+
+        if (!response.IsSuccessStatusCode)
+            return [];
+
+        var result = await response.Content.ReadFromJsonAsync<List<AnnotationDto>>(_jsonOptions, cancel);
+        return result ?? [];
+    }
+}

EnvelopeGenerator.ReceiverUI/Services/AppVersionService.cs

@@ -0,0 +1,26 @@
+namespace EnvelopeGenerator.ReceiverUI.Services;
+
+/// <summary>
+/// Provides application version for cache busting static assets.
+/// Version is automatically incremented on each build via AssemblyVersion.
+/// </summary>
+public class AppVersionService
+{
+    /// <summary>
+    /// Current application version (e.g., "1.0.0.0")
+    /// </summary>
+    public string Version { get; }
+
+    public AppVersionService()
+    {
+        // Get version from assembly metadata
+        Version = typeof(AppVersionService).Assembly.GetName().Version?.ToString() ?? "1.0.0.0";
+    }
+
+    /// <summary>
+    /// Generates versioned URL for static assets (cache busting)
+    /// </summary>
+    /// <param name="path">Asset path (e.g., "css/envelope-viewer.css")</param>
+    /// <returns>Versioned URL (e.g., "css/envelope-viewer.css?v=1.0.0.0")</returns>
+    public string GetVersionedUrl(string path) => $"{path}?v={Version}";
+}

EnvelopeGenerator.ReceiverUI/Services/AuthService.cs

@@ -0,0 +1,57 @@
+using System.Net;
+using EnvelopeGenerator.ReceiverUI.Options;
+using Microsoft.Extensions.Options;
+
+namespace EnvelopeGenerator.ReceiverUI.Services;
+
+public enum EnvelopeLoginResult { Success, InvalidCode, NotFound, Error }
+
+public class AuthService(HttpClient http, IOptions<ApiOptions> apiOptions)
+{
+    private readonly ApiOptions _api = apiOptions.Value;
+
+    /// <summary>
+    /// Checks whether the current user holds a valid receiver token for the given envelope key.
+    /// Calls GET /api/auth/check/envelope/{envelopeKey}.
+    /// </summary>
+    public async Task<bool> CheckEnvelopeAccessAsync(string envelopeKey, CancellationToken cancel = default)
+    {
+        var response = await http.GetAsync($"{_api.BaseUrl}/api/auth/check/envelope/{Uri.EscapeDataString(envelopeKey)}", cancel);
+        return response.StatusCode == HttpStatusCode.OK;
+    }
+
+    /// <summary>
+    /// Submits the access code for the given envelope key.
+    /// Calls POST /api/Auth/envelope-receiver/{key} with multipart/form-data.
+    /// On success the API sets an authentication cookie automatically.
+    /// </summary>
+    public async Task<EnvelopeLoginResult> LoginEnvelopeReceiverAsync(string envelopeKey, string accessCode, CancellationToken cancel = default)
+    {
+        var form = new MultipartFormDataContent();
+        form.Add(new StringContent(accessCode), "AccessCode");
+
+        var response = await http.PostAsync(
+            $"{_api.BaseUrl}/api/Auth/envelope-receiver/{Uri.EscapeDataString(envelopeKey)}",
+            form, cancel);
+
+        return response.StatusCode switch
+        {
+            HttpStatusCode.OK => EnvelopeLoginResult.Success,
+            HttpStatusCode.Unauthorized => EnvelopeLoginResult.InvalidCode,
+            HttpStatusCode.NotFound => EnvelopeLoginResult.NotFound,
+            _ => EnvelopeLoginResult.Error
+        };
+    }
+
+    /// <summary>
+    /// Removes the per-envelope receiver cookie for the given envelope key.
+    /// Calls POST /api/auth/logout/envelope/{envelopeKey}.
+    /// </summary>
+    public async Task<bool> LogoutEnvelopeReceiverAsync(string envelopeKey, CancellationToken cancel = default)
+    {
+        var response = await http.PostAsync(
+            $"{_api.BaseUrl}/api/auth/logout/envelope/{Uri.EscapeDataString(envelopeKey)}",
+            null, cancel);
+        return response.IsSuccessStatusCode;
+    }
+}

EnvelopeGenerator.ReceiverUI/Services/CustomDataSourceWizardJsonDataConnectionStorage.cs

@@ -0,0 +1,40 @@
+using DevExpress.DataAccess.Json;
+using DevExpress.DataAccess.Web;
+using DevExpress.DataAccess.Wizard.Services;
+
+namespace EnvelopeGenerator.ReceiverUI.Services
+{
+    public class CustomDataSourceWizardJsonDataConnectionStorage : IDataSourceWizardJsonConnectionStorage
+    {
+        public static JsonDataConnection GetDefaultConnection() {
+            var uriJsonSource = new UriJsonSource() {
+                Uri = new Uri(@"https://raw.githubusercontent.com/DevExpress-Examples/DataSources/master/JSON/customers.json"),
+            };
+            return new JsonDataConnection(uriJsonSource) { StoreConnectionNameOnly = true, Name = "NWindProductsJson" };
+        }
+        public static List<JsonDataConnection> GetConnections() {
+            var connections = new List<JsonDataConnection> {
+                GetDefaultConnection()
+            };
+            return connections;
+        }
+
+        bool IJsonConnectionStorageService.CanSaveConnection => false;
+        bool IJsonConnectionStorageService.ContainsConnection(string connectionName) {
+            return GetConnections().Any(x => x.Name == connectionName);
+        }
+
+        IEnumerable<JsonDataConnection> IJsonConnectionStorageService.GetConnections() {
+            return GetConnections();
+        }
+
+        JsonDataConnection IJsonDataConnectionProviderService.GetJsonDataConnection(string name) {
+            var connection = GetConnections().FirstOrDefault(x => x.Name == name);
+            if(connection == null)
+                throw new InvalidOperationException();
+            return connection;
+        }
+
+        void IJsonConnectionStorageService.SaveConnection(string connectionName, JsonDataConnection connection, bool saveCredentials) { }
+    }
+}

EnvelopeGenerator.ReceiverUI/Services/CustomJsonDataConnectionProviderFactory.cs

@@ -0,0 +1,24 @@
+using DevExpress.DataAccess.Json;
+using DevExpress.DataAccess.Web;
+namespace EnvelopeGenerator.ReceiverUI.Services
+{
+    public class CustomJsonDataConnectionProviderFactory : IJsonDataConnectionProviderFactory {
+        public IJsonDataConnectionProviderService Create() {
+            return new WebDocumentViewerJsonDataConnectionProvider(CustomDataSourceWizardJsonDataConnectionStorage.GetConnections());
+        }
+    }
+
+    public class WebDocumentViewerJsonDataConnectionProvider : IJsonDataConnectionProviderService
+    {
+        readonly List<JsonDataConnection> jsonDataConnections;
+        public WebDocumentViewerJsonDataConnectionProvider(List<JsonDataConnection> jsonDataConnections) {
+            this.jsonDataConnections = jsonDataConnections;
+        }
+        public JsonDataConnection GetJsonDataConnection(string name) {
+            var connection = jsonDataConnections.FirstOrDefault(x => x.Name == name);
+            if(connection == null)
+                throw new InvalidOperationException();
+            return connection;
+        }
+    }
+}

EnvelopeGenerator.ReceiverUI/Services/CustomReportProvider.cs

@@ -0,0 +1,21 @@
+using DevExpress.XtraReports.UI;
+using DevExpress.XtraReports.Services;
+using EnvelopeGenerator.ReceiverUI.PredefinedReports;
+
+namespace EnvelopeGenerator.ReceiverUI.Services
+{
+    public class CustomReportProvider : IReportProviderAsync {
+        private readonly InMemoryReportStorageWebExtension reportStorage;
+
+        public CustomReportProvider(InMemoryReportStorageWebExtension reportStorage) {
+            this.reportStorage = reportStorage;
+        }
+
+        public Task<XtraReport> GetReportAsync(string id, ReportProviderContext context) {
+            if(reportStorage.TryGetReport(id, out var savedReport))
+                return Task.FromResult(savedReport);
+
+            return Task.FromResult(ReportsFactory.GetReport(id));
+        }
+    }
+}

EnvelopeGenerator.ReceiverUI/Services/DocumentService.cs

@@ -0,0 +1,27 @@
+using System.Net;
+using System.Net.Http;
+using Microsoft.Extensions.Options;
+using EnvelopeGenerator.ReceiverUI.Options;
+
+namespace EnvelopeGenerator.ReceiverUI.Services;
+
+public class DocumentService(HttpClient http, IOptions<ApiOptions> apiOptions)
+{
+    private readonly ApiOptions _api = apiOptions.Value;
+
+    /// <summary>
+    /// Fetches the PDF bytes for the given envelope key from the API.
+    /// Returns null bytes with the HTTP status code on failure.
+    /// </summary>
+    public async Task<(byte[]? Bytes, HttpStatusCode StatusCode)> GetDocumentAsync(string envelopeKey, CancellationToken cancel = default)
+    {
+        var response = await http.GetAsync($"{_api.BaseUrl}/api/Document/{Uri.EscapeDataString(envelopeKey)}", cancel);
+
+        if (!response.IsSuccessStatusCode)
+            return (null, response.StatusCode);
+
+        var bytes = await response.Content.ReadAsByteArrayAsync(cancel);
+        return (bytes, response.StatusCode);
+    }
+}
+