Removed `IDocReceiverElementWriter` interface and its implementation, replacing it with repository-based operations (`IRepository<DocReceiverElement>`). Updated `CreateEnvelopeCommandHandler` to use repository methods for deleting and creating `DocReceiverElement` records.
Cleaned up dependency injection by removing `IDocReceiverElementWriter` registration. Added new database triggers for `DocReceiverElement` in `appsettings.json` and `appsettings.Database.json`.
Introduced `SENDER_SAVE_EDIT_MIGRATION_PLAN.md` to outline the migration of the sender save/edit workflow to Blazor Server. This includes splitting save and send actions, supporting draft persistence, and enabling draft editing from the dashboard.
Removed unused namespaces and performed code cleanup. Updated testing strategies to ensure correctness and prevent regressions.
- extend CreateEnvelopeCommand to support draft updates and send intent
- merge draft save logic into CreateEnvelopeCommandHandler and remove duplicate handler
- add DocReceiverElement writer abstraction and infrastructure registration for SQL-based field upserts
Introduced `UserPreferencesDto` to represent UI preferences,
including theme, dark mode, and grid layouts. Added the
`IUserPreferencesService` interface and implemented it in
`UserPreferencesService` to manage preferences stored in
the distributed cache (`dbo.TBDD_CACHE`).
Registered `UserPreferencesService` in dependency injection
and added a NuGet reference for `Microsoft.Extensions.Caching.Abstractions`.
Created `UserPreferencesController` with `GET` and `PUT`
endpoints to retrieve and save user preferences. Validated
theme names in the `PUT` endpoint.
Updated `Program.cs` to ensure proper service registration.
