Introduced several new classes in the `EnvelopeGenerator.WebUI.Client` namespace:
- Added `Adjustment` class for financial adjustments with deterministic randomization.
- Added `Customer` class to load customer data from a SQL data source with fallback.
- Added `DataItem` class to represent detailed billing data, including adjustments.
- Added `DataItemList` class implementing `IList` for dynamic `DataItem` generation.
- Added `DeterministicRandom` class for reproducible random value generation.
- Added `Term` struct to define payment terms.
- Added `ReportsFactory` class to manage predefined reports.
Updated `MIGRATION_CONTEXT.md` to document the completion of Phase 5 (Data & PredefinedReports Migration) and outline next steps for resolving DevExpress-related errors in Phase 7.
Introduced new models (`SignatureDto`, `SignatureCaptureDto`, `EnvelopeReceiverDto`) to support a signature-based workflow. Added services for handling API interactions (`SignatureService`, `AuthService`, `DocumentService`, `EnvelopeReceiverService`, `SignatureCacheService`).
Enhanced configuration with `ApiOptions` and `PdfViewerOptions`. Integrated DevExpress features with custom data connection providers, in-memory report storage, and font loading utilities.
Marked `AnnotationDto` and `AnnotationService` as `[Obsolete]` in favor of newer implementations. Added detailed documentation for coordinate systems, unit conversions, and usage scenarios.
Added `EnvelopeSenderPage.razor` as a placeholder for the sender's dashboard.
Updated `Index.razor` to include a homepage with a hero header, feature badges,
and dynamic description rendering using JavaScript interop.
Implemented `LoginReceiverPage.razor` for secure document access via access code,
with error handling and user feedback for various login states.
Implemented `LoginSenderPage.razor` for sender authentication, including error
handling, password visibility toggle, and redirection to the sender dashboard.
Introduced a new Blazor WebAssembly project (`EnvelopeGenerator.WebUI.Client`) targeting .NET 8.0 for client-side functionality.
Added a Blazor Server project (`EnvelopeGenerator.WebUI`) to host the application and enable server-side rendering.
Created essential Razor components (`MainLayout.razor`, `Home.razor`, `Routes.razor`, `Error.razor`, etc.) for layouts, routing, and error handling.
Configured project files, solution structure, and build settings. Added necessary styles, app settings, and launch profiles for development.
