Fix position synchronization, add album art fetching, and document busctl usage

- Use Web UI as authoritative time source for better MPRIS position sync
- Implement album art fetching via iTunes Search API
- Optimize window title parsing to focus on metadata
- Add busctl testing commands to README and GEMINI.md

README.md

@@ -51,6 +51,19 @@ sudo dnf install wmctrl libnotify  # or sudo apt install wmctrl libnotify
 python3 winamp_mpris.py
 ```
 
+### Testing and Debugging
+You can use `busctl` to interact with the MPRIS interface:
+```bash
+# Get playback status
+busctl --user get-property org.mpris.MediaPlayer2.winamp /org/mpris/MediaPlayer2 org.mpris.MediaPlayer2.Player PlaybackStatus
+
+# Get current position (in microseconds)
+busctl --user get-property org.mpris.MediaPlayer2.winamp /org/mpris/MediaPlayer2 org.mpris.MediaPlayer2.Player Position
+
+# Send commands
+busctl --user call org.mpris.MediaPlayer2.winamp /org/mpris/MediaPlayer2 org.mpris.MediaPlayer2.Player PlayPause
+```
+
 ### Running as a systemd User Service
 1. **Install the service file**:
    ```bash