Faster Media Import and More Accurate Attach Status

🔄 Improvements

• You can now drop presentation files directly onto the Video tab. The upload starts immediately, and the interface automatically switches to Slides so the imported presentation is shown right away. Demo video

🛠 Fixes

• Fixed: The Attach button now waits until the image is actually added to the mind map before showing a successful attachment status. This prevents "Attached!" from appearing too early.

And other improvements