Full-featured task tracker with FastAPI + HTMX + SQLite:
- CRUD operations (create, read, toggle, edit, delete)
- HTMX-powered UI without page reloads
- Filters (All / Active / Done)
- Server-side title validation (empty, >140 chars)
- Responsive CSS (375px–1400px)
- 58 tests (unit + integration), ruff clean

Co-authored-by: Cursor <cursoragent@cursor.com>