Comprehensive documentation update and code review with systematic TODO organization

[Copilot]

This PR addresses the request for updating documentation to align with current code status and conducting a thorough code review with TODO organization and task prioritization.

Problem Statement

The documentation was outdated compared to the current codebase, with several active modules lacking documentation and status indicators not reflecting the actual enabled/disabled state in src/index.ts. Additionally, the codebase needed a systematic code review to identify improvement opportunities and technical debt.

Changes Made

1. Documentation Alignment and Completeness

Fixed status discrepancies between docs and code:

• Updated docs/README.md feature table to accurately reflect module states from src/index.ts
• Corrected status for EmojiReact module (inactive but docs showed active)
• Added new active modules that were missing documentation

Created missing documentation for active modules:

• docs/features/communication/navi.md - Human counseling/life advice functionality
• docs/features/game/dice.md - TRPG dice rolling features
• docs/features/automation/noting.md - Automated weather note posting

Updated existing documentation with review status:

• Added warning notices for emotion-analysis and memory-management docs pending implementation verification

2. Comprehensive Code Review

Added systematic TODOs across all major modules:

• AI Core (ai.ts): Error handling, module dependency management, performance monitoring
• Communication modules: Conversation flow improvements, API optimization, security enhancements
• Game modules: Advanced features, history tracking, customization options
• Automation modules: API redundancy, monitoring, regional support
• System modules: Comprehensive metrics, alerting, long-term storage

Created structured improvement plan:

• docs/code-review-2025.md - Comprehensive review with 50+ improvement items
• Prioritized by impact: Critical → High → Medium → Low
• Organized by timeline: Immediate → 1-2 weeks → 1-2 months → 3+ months

3. Development Process Improvements

Enhanced development guidelines in docs/development.md:

• Added code quality standards and security considerations
• Included performance optimization guidelines
• Established TODO management and error handling best practices
• Created debugging and monitoring procedures

Build configuration fixes:

• Resolved TypeScript compilation errors in src/config.ts
• Ensured proper type safety for configuration management

Technical Impact

Immediate benefits:

• 100% documentation coverage for all active modules
• Clear roadmap for technical debt reduction
• Improved developer onboarding with comprehensive guidelines

Long-term improvements identified:

• Error handling standardization across modules
• API security and rate limiting implementation
• Performance monitoring and optimization opportunities
• Enhanced testing coverage requirements

Module Status Summary

Active modules with updated docs (🟢):
Core, Welcome, Follow, Ping, Talk, AiChat, Navi, Reversi, GuessingGame, Kazutori, Dice, Reminder, Timer, Birthday, Valentine, SleepReport, Noting, Server, Emoji, CheckCustomEmojis, Fortune

Inactive modules correctly marked (❌):
EmojiReact, Keyword, Maze, Chart, Poll, EarthquakeWarning

Under review (⚠️):
Emotion-analysis, Memory-management (documentation may not match current implementation)

This comprehensive update provides a solid foundation for future development while maintaining high documentation standards and identifying clear improvement paths for code quality and feature enhancement.

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