Smarter Maps, Better Audio

🛠 Fixes

• Fixed: old file versions are now properly removed during move/rename
• Fixed: transcription connector restored between mind map branches and paragraphs

✨ New Features

• Added: automatic deletion of previous mind map thumbnail when rotating maps

🔄 Improvements

• Audio mixer refactored to use WebRTC noise suppression instead of custom noise reduction, providing cleaner audio quality

And other improvements