More Reliable Offline AI and Better Attachment Handling

🔄 Improvements

• Improved the app manifest with updated app naming, descriptions, and icon handling for better installation and browser integration

🛠 Fixes

• Fixed: Account menu loading in Electron can now properly recover after temporary failures using the existing Retry flow
• Fixed: Attachment and audio stream handling could still rely on outdated legacy fallback files in some scenarios

And other improvements