Faster Retranscription and Smoother Editing Experience

🔄 Improvements

• Retranscription is now significantly more efficient and no longer causes high CPU usage or UI slowdowns during processing
• Outline, segmentation, and transcription panels remain responsive while retranscription is running
• Improved background processing of retranscribed audio chunks for smoother operation

🛠 Fixes

• Fixed: Section segmentation ranges are now imported correctly, preventing segmentation-related issues in transcription processing

And other improvements