Refactor SignalR client DI and config, add test factory
Refactored FruitBankSignalRClient construction to use DI and centralized configuration from appsettings.json across all platforms. Introduced TestSignalRClientFactory for consistent test setup. Added FruitBankHubConnectionExtensions for reusable SignalR connection and logging configuration. Updated Program.cs and MauiProgram.cs to register logger factories, log writers, and IHubConnectionBuilder via DI. Embedded appsettings.json in MAUI and updated .csproj references for build flexibility. No business logic changes; all updates are infrastructure and test setup.
- Move SignalParams-aware deserialization logic from AcBinaryHubProtocol to new AyCodeBinaryHubProtocol, enabling project-specific customization.
- Make key deserialization and helper methods in AcBinaryHubProtocol protected and virtual for easier extension.
- Improve byte[] handling to distinguish between AcBinary-serialized and raw data.
- Remove diagnostic serialization verification from the base protocol.
- Update DI registration to use AyCodeBinaryHubProtocol with configurable options.
- Adjust client code to support object-based response data and raw byte handling.
- Comment out SignalResponseDataMessage diagnostic logger in Program.cs.
- Replaced DxWindow with custom Bootstrap 5 fullscreen overlay for grid components, improving fullscreen UX and styling.
- Added new CSS for fullscreen overlay, header, and body; retained legacy DxWindow styles for compatibility.
- Introduced SignalRSerializerDiagnosticLog flag to control binary serializer diagnostics at runtime.
- Enabled diagnostics in DevAdminSignalRHub, FruitBankSignalRClient, and Program.cs based on the new flag.
- Updated OrderClientTests to use GetStockTakings(false).
- Added StockTakingSerializerTests for binary serialization/deserialization validation and debugging.
Introduces ISecureCredentialService abstraction and platform-specific implementations for secure credential storage (WebAssembly, MAUI, server). Refactors LoggedInModel to support async auto-login, login, and logout using stored credentials. Updates DI and UI logic to enable seamless auto-login and logout across all platforms. Cleans up redundant navigation checks and improves maintainability.