v1.1.0

Fixed: repeat state is now per-tab — enabling loop in one tab no longer affects other tabs
Fixed: hotkey R no longer triggers while typing in comments or search (added contentEditable check)
Fixed: hotkey R now only works on video pages, not on YouTube homepage or search
Improved: MutationObserver is now debounced for better performance
Improved: observer stops on non-watch pages, reducing resource usage
Removed storage permission (no longer needed)