Add keyboard shortcuts

* spacebar: play/pause
* f: toggle full screen
* enter: focus chat
* horizontal arrows: +- 5s seek
* vertical arrows: +- volume
* m: mute

desktop-client/vlc_player.py

@@ -16,7 +16,8 @@ class VLCSyncPlayer:
         # Initialize VLC instance
         # --no-xlib prevents crashes on Linux
         # --drop-late-frames improves sync by not delaying playback when CPU is slow
-        self.instance = vlc.Instance("--no-xlib", "--drop-late-frames")
+        # --no-keyboard stops VLC from capturing and swallowing keyboard events
+        self.instance = vlc.Instance("--no-xlib", "--drop-late-frames", "--no-keyboard")
         self.media_player = self.instance.media_player_new()
         
         # Embed the VLC player into the provided PyQt QFrame