Introduced framework-first design rules and updated documentation to clarify framework vs. consumer boundaries. Added AcLoggerOptions and DI-based logger factory extensions to AyCode.Core, enabling per-category logger instantiation from appsettings.json. Standardized SignalR connection setup with AddAcDefaults, replacing project-specific code. Enhanced protocol configuration for DI scope isolation. Refactored appsettings.json structure and added MSBuild targets for config propagation. Removed obsolete code and updated comments to match new patterns.
