This commit addresses the "Uncaught (in promise) Error: A listener indicated an asynchronous response by returning true, but the message channel closed before a response was received" error that occurs when async operations attempt to update state after component unmount.
Changes:
- Add component mount status tracking with useRef in App.tsx and DocumentManager.tsx
- Implement beforeunload event listeners to handle page reload scenarios
- Add mount status checks before and after async operations
- Add try-catch blocks to properly handle errors in async operations
- Ensure state updates only occur when components are still mounted
- Prevent health check and document polling from causing errors during unmount
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