- 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.