Refactor docs: topic folders, TOON, XCUT, protocol sync
- Migrated all topic documentation into dedicated folders with canonical `README.md`, `ISSUES.md`, and `TODO.md` per topic (e.g., `LOGGING/`, `SIGNALR/`, `BINARY/`, `TOON/`).
- Added comprehensive TOON serializer documentation: design, format, options, attributes, inference, issues, and TODOs.
- Introduced `XCUT` folder for cross-cutting issues and TODOs, with canonical entries and topic cross-references.
- Updated all references and navigation to use new folder-based doc paths; fixed links and clarified doc structure.
- Enhanced AI agent protocol: enforce session skill preloading, `[LOADED_DOCS: ...]` short-name prefix, and mandatory `docs-check` skill for doc/code sync.
- Updated `.csproj` to include all `README.md` files for IDE visibility.
- Improved and clarified SignalR, grid, and project-level documentation.
- Minor code/test tweaks and doc content corrections for consistency.
Refactored MgGridDataColumn to efficiently parse and cache URL templates and property accessors, improving cell rendering performance. Replaced Regex.Replace with a compiled, cached approach using [GeneratedRegex]. Updated all project files to use $(Configuration) in DLL HintPaths for correct build output. Added Microsoft.AspNetCore.App framework reference and removed unused references. No breaking API changes.
Introduce reusable MgGridToolbarBase and MgGridToolbarTemplate components, replacing old toolbar implementations. InfoPanel now displays grid captions and includes a toolbar for quick actions. Refactor InfoPanel value rendering for improved DevExpress-like appearance. Update IMgGridBase and related classes to support captions and use new abstractions. Update usings and project structure accordingly.
Refactored `OnDataSourceLoaded` to be asynchronous for better state handling. Downgraded `Newtonsoft.Json` to version `13.0.3` across multiple projects for compatibility. Enhanced `MeasuringItemPalletBase` with `SetParentPropToNull` and `SetForeignKey` methods. Refactored `OrderItemPallet`, `ShippingItemPallet`, and `StockTakingItemPallet` to simplify table attributes and improve parent-child relationship handling.
Added `IsReadyForClose` to `StockTaking` for better closure validation. Updated SignalR tag constants to reflect new functionality. Improved Razor components (`PalletItemComponent`, `StockTakingTemplate`, `MeasuringIn`, `MeasuringOut`) to streamline logic and maintain proper references.
Introduced `JsonExtensionTests` for comprehensive validation of JSON serialization/deserialization, including deep hierarchies, circular references, and hybrid references. Added `test_debug.ps1` for streamlined test debugging. Performed general code cleanup and improved test coverage.