M2-T11: serve React SPA from FastAPI and remove Jinja pages
- app/main.py serves the SPA build (SPA_DIST_DIR, default frontend/dist):
mounts /assets and a GET catch-all returning index.html for client routes;
catch-all 404s on /api/*, never swallows /docs, /openapi.json, /static, assets,
ingestion/ticktick/status; skips SPA serving when dist absent (backend-only CI)
- delete app/api/routes/pages.py, app/api/routes/auth.py, app/templates/
(all replaced by /api/* + SPA; auth service layer kept)
- remove/replace Jinja page tests (JSON coverage already in test_api_*);
add tests/test_spa_hosting.py for the fallback contract
- regenerate openapi/ (Jinja paths gone) and frontend schema.d.ts
tliu93
a9830c42d8