Memory Leak Fixes:
- Add max pending requests limit (100) to prevent unbounded growth
- Cancel pending requests in _reconnect() before reconnecting
- Track ImageStream listeners in expandable_player for proper cleanup
- Add cleanup in dispose() for active image stream listeners
Database Performance:
- Add batchCacheItems() method using drift batch API
- Chunk batches at 500 items to avoid SQLite limits
- Refactor sync_service to use batch inserts (~10x faster)
- Add BatchCacheItem data class for type-safe batch operations
Race Condition Fix:
- Make connection guard check-and-set atomic
- Create completer before check to close race window
WCAG Accessibility:
- Mark ButtonSizes.sm/md as @Deprecated (below 44x44 minimum)
- Add ButtonSizes.minAccessible constant (48x48)
- Add clear documentation on WCAG Level AA/AAA requirements
Provider Decomposition (partial):
- Extract SleepTimerProvider with callback pattern
- Extract ConnectionProvider skeleton for future integration
- Prepare facade pattern for backward compatibility
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
