Implement calendar display application

Built a full-featured smart display app with Flask backend and responsive frontend.

Features:
- Real-time clock display
- Weather integration (OpenWeatherMap API) for Hamilton, NZ
- Google Calendar integration (placeholder, needs credentials)
- Rotating background images from local directory
- Dad jokes display (icanhazdadjoke API)

Technical stack:
- Backend: Python Flask with API endpoints
- Frontend: HTML/CSS/JavaScript with auto-updating data
- Caching system to avoid API rate limits
- Responsive design for various screen sizes

Deployment ready for Raspberry Pi with systemd service and Chromium kiosk mode setup instructions.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,45 @@
+# Environment variables
+.env
+
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+.Python
+venv/
+env/
+ENV/
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+
+# Credentials
+credentials/*.json
+!credentials/.gitkeep
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Logs
+*.log