Added comprehensive inline comments (mainly in German) to key files (index.html, Program.cs, App.razor, MainLayout.razor, NavMenu.razor, Catalogs.razor, CatalogApiClient.cs) to clarify their roles and the overall application flow. Updated Home.razor with a clearer heading and intro. Introduced Ablauf.cs, which documents the loading order and responsibilities of each major component. These changes enhance codebase clarity and maintainability, especially for German-speaking developers.
Refactored CatalogApiClient methods to return ApiResult<T> for create, update, and delete operations, enabling more detailed error reporting. Introduced ApiResult<T> and ProblemDetailsDto types, and added logic to parse and display informative error messages. Updated Catalogs.razor to use the new pattern and show user-friendly error feedback. Added necessary using directives.
- Split `CatalogDto` into `CatalogReadDto` and `CatalogWriteDto` for clear separation of read/write operations in both backend and frontend.
- Updated API controllers, services, and AutoMapper profiles to use new DTOs; ensured audit fields are set in service layer.
- Enabled CORS in the API project to support Blazor WASM frontend.
- Added new Blazor WebAssembly project (`DbFirst.BlazorWasm`) with catalog management UI, API client, Bootstrap v5.1.0 styling, and configuration-driven API base URL.
- Included `bootstrap.min.css` and its source map for frontend styling and easier debugging.
- Updated solution file to include new project and support multiple build configurations.
- Result: improved API design, clean DTO separation, and a modern interactive frontend for catalog management.
