- Created useTabVisibility hook to track tab visibility state
- Provides whenVisible(), whenHidden(), onVisible() utilities
- Executes callbacks when visibility changes
- Created useLongRunningOperation hook for managing long-running operations
- Operations can continue when tab is hidden (configurable)
- Provides start(), stop(), isRunning() control functions
- Supports abort controller for cancellation
- Cleanup on unmount
- All hooks are properly typed and documented with examples
