Major fixes and improvements:

VIDEO LOOP FUNCTIONALITY:
- Fixed critical import scope error where Message class was locally imported in play_loop action but unavailable to stop_loop action
- Implemented comprehensive EndOfMedia detection and auto-restart mechanisms in Qt player
- Added ERROR-level diagnostic logging throughout video loop control system for precise issue identification
- Enhanced loop control parameters with infinite_loop, loop_count, and continuous_playback flags
- Fixed video playback state management with proper loop parameter processing

FIXTURES TEMPLATE ENHANCEMENTS:
- Removed hardcoded HTML content and implemented dynamic JavaScript data loading
- Enhanced fallback data system with realistic fighter names (John Doe vs Mike Smith, Alex Johnson vs Chris Brown)
- Improved template initialization with proper loading states and API error handling
- Fixed template data display to show proper fallback when API endpoints are unavailable

TECHNICAL IMPROVEMENTS:
- Updated build configuration to version 1.2.11
- Enhanced PyQt6 media player loop control with MediaStatus handling
- Improved message bus architecture for cross-thread communication between web dashboard and Qt player
- Enhanced Flask API development with better parameter handling and message publishing
- Updated comprehensive project documentation (CHANGELOG.md and README.md)

DIAGNOSTIC SYSTEMS:
- Implemented comprehensive ERROR-level logging system throughout Qt player for high-visibility debugging
- Added systematic issue identification capabilities
- Enhanced video loop diagnostics with complete state tracking
- Improved template loading architecture with timeout handling and graceful degradation

All core functionality has been tested and validated with diagnostic systems in place for identifying any remaining edge cases.