Track each authenticated user's last-viewed route + light view state
server-side, and on next sign-in redirect them to that state, falling
back to the empty-state home only when there's no recorded state.
Backend:
- migration 022_user_session_state.sql: one row per user
(user_id PK/FK, last_route, last_route_state JSON-as-TEXT,
resume_enabled default 1, last_updated_at).
- PUT /api/me/last-state (require_user): upserts route + light state;
no-ops when resume_enabled=0. Localized in the /me region.
- /api/auth/me payload now carries resume_enabled + last_route +
decoded last_route_state (no extra round-trip).
- test_session_resume_vertical.py: auth-required, upsert/read-back,
per-user isolation, resume_enabled=0 disable.
Frontend:
- lib/useLastState.js: debounced (~1s) route-change PUT for
authenticated users; one-time resume redirect on sign-in, gated on
identify having fired (preserves #21 Part C identify-then-track).
- api.js: putLastState() client call.
- App.jsx: import + call the hook; set identifyReady after identify.
Header region untouched.
Per-user (not per-device); profile-settings opt-out toggle UI
deferred (column + default-on behavior ship now). Stored state is
route + light view state ONLY, never draft buffers — documented in
SPEC §6.8.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Ben Stull