initial release

Restructure project layout and add Docker support

- Move apps/api to backend/ and apps/web to frontend/
- Add single-container Dockerfile with integrated frontend/backend
- Register all API routes under /api/ prefix
- Update vite.config.ts proxy configuration
- Add formatTimeLocal for displaying times in local timezone
- Update HistoryPage to use local time format (YYYY-MM-DD HH:MM:SS)
- Update all documentation and references