Clearer Transcription Stop, Better Audio Capture, Updated Icons

🛠 Fixes

• Fixed: untranscribed chunks now complete correctly after recording stops
  Screenshot

• Fixed: the final section of the transcription is now always processed, no missing tail

• Fixed: improved audio capture error handling and fallback logic

  • More reliable detection of available microphones
  • Better fallback behavior for mixed screen plus microphone sources
  • Clearer error messages when audio capture fails

✨ New Features

• Updated desktop app icon
  Preview

• Updated PWA favicon
  Preview

And other improvements