diff --git a/EnvelopeGenerator.sln b/EnvelopeGenerator.sln
index 48339de7..421cd0cd 100644
--- a/EnvelopeGenerator.sln
+++ b/EnvelopeGenerator.sln
@@ -22,6 +22,7 @@ EndProject
Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "src", "src", "{134D4164-B291-4E19-99B9-E4FA3AFAB62C}"
ProjectSection(SolutionItems) = preProject
COPILOT_CONTEXT_EN.md = COPILOT_CONTEXT_EN.md
+ OPEN_TASK.md = OPEN_TASK.md
EndProjectSection
EndProject
Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "tests", "tests", "{0CBC2432-A561-4440-89BC-671B66A24146}"
diff --git a/OPEN_TASK_SESSION_12.md b/OPEN_TASK_SESSION_12.md
deleted file mode 100644
index a3db0f6e..00000000
--- a/OPEN_TASK_SESSION_12.md
+++ /dev/null
@@ -1,316 +0,0 @@
-# OPEN TASK - Session 12 (INCOMPLETE)
-
-## Task Description
-Update coordinate system documentation in `COPILOT_CONTEXT_EN.md` and C# XML documentation files to reflect the correct unit (INCHES, not 1/100 inch).
-
-## Status
-**FAILED** - PowerShell timeout, files not updated
-
----
-
-## What Was Discovered
-
-### 1. Database Stores INCHES (Not DX Units)
-**Source:** `EnvelopeGenerator.Form/frmFieldEditor.vb` (VB.NET legacy project)
-
-**Technology:** GdPicture14.Annotations.AnnotationStickyNote
-
-**Code Evidence:**
-```vb
-'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
-```
-
-**Location:** `E:\TekH\Visual Studio\EnvelopeGenerator_BlazorUIDev\EnvelopeGenerator.Form\frmFieldEditor.vb`
-
-### 2. Incorrect Documentation Found
-
-| File | Line | Wrong Claim | Correct Value |
-|------|------|-------------|---------------|
-| `COPILOT_CONTEXT_EN.md` | ~43 | "1/100 inch (DX units)" | **INCHES** |
-| `ReceiverUI/Models/AnnotationDto.cs` | 3-15 | "Hundredths of an inch" | **INCHES** |
-| `Application/Common/Dto/AnnotationCreateDto.cs` | 29-69 | "Hundredths of an inch (1/100 inch)" | **INCHES** |
-
----
-
-## What Needs To Be Done
-
-### Task 1: Update `COPILOT_CONTEXT_EN.md`
-
-**File:** `E:\TekH\Visual Studio\EnvelopeGenerator_BlazorUIDev\COPILOT_CONTEXT_EN.md`
-
-**Action:** Replace section `## AnnotationDto — Coordinate System` (around line 43)
-
-**New Section Title:** `## SignatureDto / AnnotationDto — Coordinate System`
-
-**New Content Must Include:**
-1. **Database storage format:** INCHES, top-left origin
-2. **Source evidence:** VB.NET code snippet from `frmFieldEditor.vb`
-3. **Conversion formulas:**
- ```
- Inches → DevExpress (DX): multiply by 100
- Inches → PDF Points: multiply by 72
- Inches → PDF.js Canvas: normalize to page size, then scale to pixels
- ```
-4. **Unit comparison table:**
-
-| System | Unit | Origin | Conversion from INCHES |
-|--------|------|--------|------------------------|
-| **GdPicture14** (Source) | **Inches** | Top-left | Database format |
-| 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` |
-
-**Problem:** Special characters (— and •) in file causing regex issues. Use exact string match or manual edit.
-
----
-
-### Task 2: Update C# XML Documentation
-
-#### 2.1 `EnvelopeGenerator.ReceiverUI/Models/SignatureDto.cs`
-**Location:** `E:\TekH\Visual Studio\EnvelopeGenerator_BlazorUIDev\EnvelopeGenerator.ReceiverUI\Models\SignatureDto.cs`
-
-**Current State:** Missing XML documentation
-
-**Action:** Add XML docs to class and properties:
-```csharp
-///
-/// 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.
-///
-public class SignatureDto
-{
- /// Unique identifier.
- public int Id { get; set; }
-
- /// Horizontal position in INCHES from left edge.
- public double X { get; set; }
-
- /// Vertical position in INCHES from top edge.
- public double Y { get; set; }
-
- /// 1-based page number.
- public int Page { get; set; }
-}
-```
-
----
-
-#### 2.2 `EnvelopeGenerator.ReceiverUI/Models/AnnotationDto.cs`
-**Location:** `E:\TekH\Visual Studio\EnvelopeGenerator_BlazorUIDev\EnvelopeGenerator.ReceiverUI\Models\AnnotationDto.cs`
-
-**Lines to Change:** 3-15 (XML doc comments)
-
-**Current (WRONG):**
-```csharp
-/// Coordinate unit (X, Y): Hundredths of an inch (1/100 inch ≈ 2.83 PDF points),
-```
-
-**Correct:**
-```csharp
-/// Coordinate unit (X, Y): Inches (GdPicture14 native unit),
-```
-
-**Full Updated XML Doc:**
-```csharp
-///
-/// Represents a pre-assigned signature annotation position on a specific page.
-///
-/// Coordinate unit (X, Y): Inches (GdPicture14 native unit),
-/// origin at the top-left corner of the page, both axes increase downward/rightward.
-///
-/// Conversion to DevExpress: Multiply by 100 (DX uses 1/100 inch).
-/// Convert: xDX = xInches * 100.0
-///
-/// Conversion to PDF Points: Multiply by 72 (1 inch = 72 points).
-/// Convert: xPt = xInches * 72.0
-///
-/// Y-axis for PDF (bottom-left origin): Flip required for iText7.
-/// Convert: yPt = (pageHeightInches - yInches - elemHeightInches) * 72.0
-///
-[Obsolete("Use SignatureDto with SignatureService.")]
-public record AnnotationDto
-{
- /// Unique identifier of the annotation.
- public long Id { get; init; }
-
- /// 1-based page number within the document.
- public int Page { get; init; }
-
- /// Horizontal position in INCHES from the left edge of the page.
- public double X { get; init; }
-
- /// Vertical position in INCHES from the top edge of the page.
- public double Y { get; init; }
-}
-```
-
----
-
-#### 2.3 `EnvelopeGenerator.Application/Common/Dto/AnnotationCreateDto.cs`
-**Location:** `E:\TekH\Visual Studio\EnvelopeGenerator_BlazorUIDev\EnvelopeGenerator.Application\Common\Dto\AnnotationCreateDto.cs`
-
-**Lines to Change:** 29-69 (XML doc for `X` and `Y` properties)
-
-**Current X Property (WRONG):**
-```csharp
-///
-/// Horizontal position of the signature field on the page.
-///
-/// DevExpress unit: Hundredths of an inch (1/100 inch ≈ 2.83 PDF points), origin at the top-left corner of the page, X increases to the right.
-///
-/// Difference from PSPDFKit: PSPDFKit also uses top-left origin but measures in PDF points (1/72 inch).
-/// To convert: xDevExpress = xPsPdfKit * (100.0 / 72.0)
-///
-/// Difference from GDPicture: GDPicture uses PDF points with bottom-left origin (standard PDF coordinate system).
-/// The X axis is the same direction, only unit conversion is needed: xDevExpress = xGdPicture * (100.0 / 72.0)
-///
-public double? X { get; init; }
-```
-
-**Correct X Property:**
-```csharp
-///
-/// Horizontal position of the signature field on the page.
-///
-/// Unit: INCHES (GdPicture14 native), origin at the top-left corner of the page, X increases to the right.
-///
-/// Conversion to DevExpress: Multiply by 100 (DX uses 1/100 inch).
-/// Convert: xDX = xInches * 100.0
-///
-/// Conversion to PDF Points: Multiply by 72 (PSPDFKit, iText7 use 1/72 inch).
-/// Convert: xPt = xInches * 72.0
-///
-public double? X { get; init; }
-```
-
-**Current Y Property (WRONG):**
-```csharp
-///
-/// Vertical position of the signature field on the page.
-///
-/// DevExpress unit: Hundredths of an inch (1/100 inch ≈ 2.83 PDF points), origin at the top-left corner of the page, Y increases downward.
-///
-/// Difference from PSPDFKit: PSPDFKit also uses top-left origin and Y increases downward, but measures in PDF points (1/72 inch).
-/// To convert: yDevExpress = yPsPdfKit * (100.0 / 72.0)
-///
-/// Difference from GDPicture: GDPicture uses PDF points with bottom-left origin, so Y increases upward (PDF standard).
-/// To convert: yDevExpress = (pageHeightInPt - yGdPicture - elementHeightInPt) * (100.0 / 72.0)
-///
-public double? Y { get; init; }
-```
-
-**Correct Y Property:**
-```csharp
-///
-/// Vertical position of the signature field on the page.
-///
-/// Unit: INCHES (GdPicture14 native), origin at the top-left corner of the page, Y increases downward.
-///
-/// Conversion to DevExpress: Multiply by 100 (DX uses 1/100 inch).
-/// Convert: yDX = yInches * 100.0
-///
-/// Conversion to PDF Points (top-left origin): Multiply by 72.
-/// Convert: yPt = yInches * 72.0
-///
-/// Conversion to PDF Points (bottom-left origin - iText7): Y-flip required.
-/// Convert: yPt = (pageHeightInches - yInches - elemHeightInches) * 72.0
-///
-public double? Y { get; init; }
-```
-
----
-
-## Additional Context
-
-### Key Code Files
-1. **Source of Truth (VB.NET):**
- - `E:\TekH\Visual Studio\EnvelopeGenerator_BlazorUIDev\EnvelopeGenerator.Form\frmFieldEditor.vb`
- - `E:\TekH\Visual Studio\EnvelopeGenerator_BlazorUIDev\EnvelopeGenerator.Form\Controllers\FieldEditorController.vb`
-
-2. **C# DTOs (Need Update):**
- - `E:\TekH\Visual Studio\EnvelopeGenerator_BlazorUIDev\EnvelopeGenerator.ReceiverUI\Models\SignatureDto.cs`
- - `E:\TekH\Visual Studio\EnvelopeGenerator_BlazorUIDev\EnvelopeGenerator.ReceiverUI\Models\AnnotationDto.cs`
- - `E:\TekH\Visual Studio\EnvelopeGenerator_BlazorUIDev\EnvelopeGenerator.Application\Common\Dto\AnnotationCreateDto.cs`
-
-3. **Documentation (Need Update):**
- - `E:\TekH\Visual Studio\EnvelopeGenerator_BlazorUIDev\COPILOT_CONTEXT_EN.md`
-
-### Database Schema
-**Table:** `TBSIG_DOCUMENT_RECEIVER_ELEMENT`
-
-**Columns:**
-- `POSITION_X` (FLOAT) — Stores INCHES
-- `POSITION_Y` (FLOAT) — Stores INCHES
-- `WIDTH` (FLOAT) — Stores INCHES
-- `HEIGHT` (FLOAT) — Stores INCHES
-- `PAGE` (INT) — 1-based page number
-
----
-
-## Unit Conversion Quick Reference
-
-```
-Database (GdPicture14): Inches, top-left origin
-
-→ DevExpress (LEGACY): x_DX = x_inches * 100 (1/100 inch units)
- y_DX = y_inches * 100
-
-→ PDF Points (iText7): x_pt = x_inches * 72 (bottom-left origin)
- y_pt = (pageHeight_inches - y_inches - height_inches) * 72
-
-→ PDF.js Canvas: normalize to [0,1], then scale to pixels
- x_normalized = x_inches / pageWidth_inches (e.g., 8.27 for A4)
- y_normalized = y_inches / pageHeight_inches (e.g., 11.69 for A4)
- x_pixel = x_normalized * canvasWidth * scale * dpr
- y_pixel = y_normalized * canvasHeight * scale * dpr
-
-→ PSPDFKit (Web): x_pt = x_inches * 72 (top-left origin)
- y_pt = y_inches * 72
-```
-
-**A4 Page Dimensions:**
-- Width: 8.27 inches = 595 points = 827 DX units
-- Height: 11.69 inches = 842 points = 1169 DX units
-
----
-
-## Notes for Next AI
-
-1. **DO NOT** assume DevExpress units in database
-2. **DO NOT** use PowerShell regex on UTF-8 files with special chars
-3. **USE** `replace_string_in_file` tool with exact string match
-4. **VERIFY** changes in all 4 files (1 markdown + 3 C# files)
-5. **TEST** conversions with sample data (e.g., x=1.77, y=1.96)
-
----
-
-## Session 12 Changes Already Completed
-
-1. ✅ Added `SignatureService` to DI (`EnvelopeGenerator.ReceiverUI/Program.cs`)
-2. ✅ Fixed YARP routes for Blazor WASM static files (`EnvelopeGenerator.API/yarp.json`):
- - Added routes for `appsettings.json`, `appsettings.Development.json`
- - Added route for `*.styles.css` files
- - Added routes for `/fonts/`, `/images/`
- - Removed `/wwwroot/` route (redundant)
- - Removed `receiver-ui-annotation-fake` route (no longer needed)
-
-3. ✅ `EnvelopeViewer.razor` now successfully:
- - Loads PDF via `DocumentService`
- - Loads signatures via `SignatureService`
- - Displays PDF with PDF.js viewer
- - Console logs signature data (visible in browser F12)
-
----
-
-## End of Task Description