- 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.
Moved AcSignalRDataSource and TrackingItemHelpers from AyCode.Services.Server to AyCode.Services (namespace updated). Updated all references, usings, and doc cross-refs to new location. Removed orphan SignalR.Core 1.2.0 package and .Server DLL refs from Blazor/Web.Client/Shared projects; WASM AOT build now works. Introduced AcBinaryDeserExecutor for off-pool streaming deserialization, fixing thread pool starvation (see updated protocol docs). Updated test usings and doc tables. No functional changes to DataSource logic. Decision log entry LLMP-DEC-68 documents the change.
Loretta