- Sync: Parallelize message downloads with asyncio.gather (batch size 5)
- Sync: Increase HTTP semaphore from 2 to 5 concurrent requests
- Sync: Add IPC notifications to sync daemon after sync completes
- Mail: Replace all hardcoded RGB colors with theme variables
- Mail: Remove envelope icon/checkbox gap (padding cleanup)
- Mail: Add IPC listener for refresh notifications from sync
- Calendar: Style current time line with error color and solid line
- Tasks: Fix table not displaying (CSS grid to horizontal layout)
- CLI: Implement lazy command loading for faster startup (~12s to ~0.3s)
- Add PROJECT_PLAN.md with full improvement roadmap
- Add src/utils/ipc.py for Unix socket cross-app communication
