Add mobile services, web proxy, and Gemma4 agent loop

- Mobile: add push notification and calendar sync services with full test suite (calendar, eventStore, notifications,
  screens)
- Mobile: add EAS build config and Jest setup
- Web: add API proxy, update useDestinationStation/useJourneys hooks, add middleware tests
- Web: update next.config and rebuild
- Agent: add Gemma4-based agent loop (agent_base, ttl_agent, ts_agent)
- Docs: add privacy policy, post-MVP plan, and aider rules

CHECKLIST.md

@@ -3,7 +3,7 @@
 ## Phase 1 — Workspace + Shared Packages (Steps 1-9)
 
 | # | Step | ✅ | ✔️ |
-|---|------|----|----|
+|---|---|----|-|
 | 1 | Create safety baseline (typecheck, lint, test, build) | [x] | [x] |
 | 2 | Add workspace support to root `package.json` | [x] | [x] |
 | 3 | Move web app into `apps/web/` | [x] | [x] |
@@ -17,7 +17,7 @@
 ## Phase 2 — Expo Mobile MVP (Steps 10-18)
 
 | # | Step | ✅ | ✔️ |
-|---|------|----|----|
+|---|---|----|-|
 | 10 | Scaffold Expo mobile app with TypeScript | [x] | [x] |
 | 11 | Configure mobile API base URL (`.env` + singleton) | [x] | [x] |
 | 12 | Add mobile app shell (navigation + 5 screens) | [x] | [x] |
@@ -26,21 +26,22 @@
 | 15 | Build Add Event screen with validation | [x] | [x] |
 | 16 | Build Origin Setup in Settings | [x] | [x] |
 | 17 | Build Event Detail screen (trains + bike + errors) | [x] | [x] |
-| 18 | Phase 2 summary verification | [ ] | [ ] |
+| 18 | Phase 2 summary verification | [x] | [x] |
 
 ## Phase 3 — Notifications, Calendar, Deployment (Steps 19-24)
 
 | # | Step | ✅ | ✔️ |
-|---|------|----|----|
-| 19 | Add local notifications (expo-notifications) | [ ] | [ ] |
-| 20 | Add native calendar import (post-MVP) | [ ] | [ ] |
-| 21 | Add mobile tests (core + API + store + screens) | [ ] | [ ] |
-| 22 | Prepare deployment (web backend + EAS mobile) | [ ] | [ ] |
-| 23 | Release MVP (verify acceptance criteria) | [ ] | [ ] |
-| 24 | Plan post-MVP improvements | [ ] | [ ] |
+|---|---|----|-|
+| 19 | Add local notifications (expo-notifications) | [x] | [x] |
+| 20 | Add native calendar import (post-MVP) | [~] | [~] |
+| 21 | Add mobile tests (core + API + store + screens) | [x] | [x] |
+| 22 | Prepare deployment (web backend + EAS mobile) | [x] | [x] |
+| 23 | Release MVP (verify acceptance criteria) | [x] | [x] |
+| 24 | Plan post-MVP improvements | [x] | [x] |
 
 ---
 
 **Legend:**
 - ✅ = Done (code written)
 - ✔️ = Verified (tests/builds pass)
+- `[~]` = Optional or deferred (never blocks phase advancement)