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

package.json

@@ -10,10 +10,13 @@
     "dev": "npm run dev -w apps/web",
     "build": "npm run build -w apps/web",
     "start": "npm run start -w apps/web",
-    "lint": "npm run lint -w apps/web",
-    "typecheck": "npm run typecheck -w apps/web",
+    "lint": "npm run lint -w apps/web && npm run lint -w apps/mobile",
+    "typecheck": "npm run typecheck -w apps/web && npm run typecheck -w apps/mobile",
     "test": "npm run test -w apps/web",
     "dev:mobile": "npm run start -w apps/mobile",
     "typecheck:mobile": "npm run typecheck -w apps/mobile"
+  },
+  "overrides": {
+    "react-test-renderer": "19.2.4"
   }
 }