Implement comprehensive fitness rhythm game system with music synchronization and performance optimization

[Copilot]

This PR implements a complete fitness and rhythm game system that transforms the existing body tracking toolkit into an engaging workout application. The system synchronizes bicep curl exercises with music beats and provides real-time performance feedback.

Core Features Added

Music and Rhythm Integration

• RhythmManager.cs: Handles music timing, beat detection, and beatmap loading from JSON files
• ScoringSystem.cs: Evaluates exercise timing with Perfect/Good/Bad/Miss scoring based on beat synchronization
• AudioManager.cs: Manages music playback, sound effects, and audio feedback with event-driven architecture
• Beat-synchronized exercise evaluation with configurable timing windows

Enhanced User Interface

• UIManager.cs: Comprehensive UI system with rhythm visualization, score animations, and combo effects
• Real-time beat indicators and rhythm bars that move in sync with music
• Animated score popups with color-coded feedback (Perfect/Good/Bad/Miss)
• Multi-panel interface supporting menu, gameplay, results, and settings screens

Game State Management

• FitnessRhythmGameManager.cs: Central coordinator managing all game systems and state transitions
• Complete game flow from calibration through gameplay to results
• Session tracking with statistics (accuracy, combo streaks, repetition counts)
• Configurable difficulty levels with adaptive timing windows

Performance Optimizations

Python CV Improvements

# Frame rate limiting and efficient processing
frame_skip = 2  # Process every nth frame
send_interval = 1/30  # Limit UDP sending to 30 FPS

Unity Threading and Communication

• Thread-safe UDP receiver with proper data locking
• Update frequency control to prevent performance bottlenecks
• Optimized JSON serialization for reduced network overhead

Enhanced Exercise Detection

Improved Bicep Curl Logic

• Fixed false positive counting with cooldown periods and angle validation
• Added support for asynchronous arm movements with synchronization detection
• Enhanced error handling with user feedback for invalid movements
• Configurable thresholds for different user body types

Example Usage

// Exercise events now integrate with rhythm system
BicepsCurlCounter.OnRepCompleted += (time) => {
    scoringSystem.OnRepCompleted(time); // Evaluates timing against beat
};

Configuration and Documentation

Beatmap System

{
  "songName": "Fitness Track",
  "bpm": 120,
  "beats": [
    {"time": 0.0, "intensity": 1.0, "type": "measure"},
    {"time": 0.5, "intensity": 0.7, "type": "beat"}
  ]
}

Comprehensive Documentation

• Complete setup guide (FITNESS_RHYTHM_GUIDE.md) with step-by-step instructions
• API reference with events, methods, and integration points
• Troubleshooting section with common issues and performance tips
• Sample configuration files for easy customization

Event-Driven Architecture

The system uses a clean event-driven architecture connecting all components:

• Exercise completion triggers rhythm evaluation
• Beat events drive visual feedback and UI animations
• Score events trigger audio feedback and combo tracking
• State changes coordinate UI panel transitions

This implementation addresses all requirements from the original issue: optimized UDP communication, enhanced exercise detection with error handling, rhythm synchronization, comprehensive UI feedback, and professional documentation for easy setup and extension.

Created from VS Code via the GitHub Pull Request extension.

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