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/mobile/.eslintrc.js

@@ -0,0 +1,8 @@
+module.exports = {
+  root: true,
+  extends: ['expo'],
+  rules: {
+    'react-native/no-inline-styles': 'off',
+  },
+  ignorePatterns: ['node_modules/', '.expo/', 'dist/'],
+};