FIX: Enhance video playback and implement smart aspect ratio window sizing

- Replace ReactPlayer with native HTML5 video for better MP4 support
- Add proper MIME type mapping for all video formats (mp4, webm, mkv, avi, mov, wmv, flv)
- Implement smart window sizing based on media dimensions
- Auto-adjust window size to match image/video aspect ratio with constraints
- Add media dimension detection for images (naturalWidth/Height) and videos (videoWidth/Height)
- Center windows automatically when resizing for media content
- Apply intelligent scaling with max viewport limits (90% width, 80% height)
- Preserve minimum window sizes and add padding for UI elements
- Enhanced error handling and debug logging for video playback

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

package.json

@@ -94,6 +94,7 @@
     "react-i18next": "^15.7.3",
     "react-icons": "^5.5.0",
     "react-photo-view": "^1.2.7",
+    "react-player": "^3.3.3",
     "react-resizable-panels": "^3.0.3",
     "react-simple-keyboard": "^3.8.120",
     "react-xtermjs": "^1.0.10",