implement chat messaging with event proposals

- Add functional chat with server communication and test responses
- Add ProposedEventCard component for confirm/reject actions
- Move Constants (Day, Month) from client to shared package
- Add dateHelpers utility for weekday calculations
- Extend Themes.tsx with button and text colors
- Update CLAUDE.md with current implementation status
- Add *.tsbuildinfo to .gitignore

apps/server/docker/mongo/compose.yml

@@ -19,7 +19,7 @@ services:
     image: mongo-express:latest
     restart: always
     ports:
-      - "8081:8081"
+      - "8083:8083"
     environment:
       ME_CONFIG_MONGODB_URL: mongodb://root:mongoose@mongo:27017/
       ME_CONFIG_BASICAUTH_ENABLED: true