Refactored EKÁER declaration logic to allow one EkaerHistory to reference multiple source documents via a new EkaerHistoryMapping junction table. Removed ForeignKey from EkaerHistory and updated all usages to use the Mappings collection. Updated service, controller, SignalR, and client interfaces to operate by EkaerHistoryId. Adjusted grid UI to display all mapped source IDs. Added EkaerHistoryMapping entity and updated documentation, constants, and ToonDescription attributes accordingly.
- Validation now distinguishes blocking errors from warnings; only errors block submission, warnings are shown but allow progress.
- Introduced EkaerSeverity, EkaerValidationMessage, and severity-aware extensions for validation results.
- Extended EkaerHistory.Status with GeneratedWithWarning and SentWithMissingData; added EkaerStatusExtensions for status categorization.
- Added EkaerHistoryFilter for server-side filtering; updated SignalR and controller interfaces accordingly.
- UI now displays error/warning messages with color/icons, supports new status tabs/filters, and restricts XML copying to submittable records.
- Refactored validation and error handling to use new severity logic; updated comments and minor code for clarity.
- Introduced `EkaerHistory` entity with status enum and new properties for EKÁER declaration lifecycle tracking.
- Added CRUD methods for `EkaerHistory` in controller interface and SignalR client.
- Implemented `GridEkaerHistory` and `GridEkaerDetail` components for displaying EKÁER records and trade card details.
- Enhanced `TradeCardItemType` with `IId<int>` for grid compatibility.
- Improved AcSignalRDataSource to skip server refresh for tagless/local data sources.
- Updated settings to include .NET 9 runtime install commands.
Loretta