Two-Way Markdown Sync, Offline Audio Export & Safer Support Sharing

🔄 Improvements

• Improved transcription experience: clear notification when no transcription is available, with consistent multi-language support.
• AI quotes now fully respect the toggle setting — when disabled, manual quotes are used without sending AI requests.
• Full-size images now open correctly in the Electron app.
• Improved audio export flow in Electron with local processing and proper progress handling.

✨ New Features

• Two-way Markdown editing: edit Markdown directly and keep your mind map in sync.
  Toast errors are shown if Markdown cannot be parsed or rendered.
  Demo video
• ivvi Markdown v1 support: reliable import and export with deterministic round-trip, preserving key node metadata.
• Offline audio export in Electron: save recorded audio (WAV/MP3) even without server streaming.
• Confirmation before sharing a file with support: explicit consent with clear success/error feedback.
  Demo video

🛠 Fixes

• Fixed: unnecessary “Saving…” indicator triggered by filter changes in Electron.
• Fixed: audio export in Electron now works correctly without server connection.
• Fixed: full-size images not opening properly in Electron.
• Fixed: empty transcription message was not always displayed correctly.
• Fixed: AI quotes could run even when the toggle was disabled.

And other improvements