Faster Transcription Performance and File Copy Progress

🔄 Improvements

• Improved transcription performance during retranscription and live processing of large recordings
• Reduced background processing overhead in the transcription panel, helping keep updates more responsive
• Added real-time progress updates when copying or duplicating files with many attachments

✨ New Features

• Added detailed progress notifications for file copy and duplication operations, so you can see completion status while files are being processed

🛠 Fixes

• Fixed: file copy and duplication progress notifications now display correctly throughout the operation

And other improvements