Fix Uptime Kuma integration and add interactive UI

- Switch to uptime-kuma-api library (Socket.io based)
- Add Approve & Run buttons for Claude's additional commands
- Add answer input fields for Claude's questions
- Add push monitor type support

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

backend/requirements.txt

@@ -7,3 +7,4 @@ requests==2.31.0
 python-dotenv==1.0.0
 gevent==23.9.1
 gevent-websocket==0.10.1
+uptime-kuma-api==1.2.1