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

apps/web/package.json

@@ -12,6 +12,8 @@
     "test:watch": "vitest"
   },
   "dependencies": {
+    "@timetoleave/api-client": "*",
+    "@timetoleave/core": "*",
     "date-fns": "^4.1.0",
     "next": "^16.2.6",
     "node-ical": "^0.26.1",
@@ -21,6 +23,7 @@
   "devDependencies": {
     "@tailwindcss/postcss": "^4",
     "@testing-library/jest-dom": "^6.9.1",
+    "@testing-library/dom": "^10.4.1",
     "@testing-library/react": "^16.3.2",
     "@types/node": "^20",
     "@types/react": "^19",