Reduce unnecessary state refreshes to prevent UI dialog closure

- Don't refresh immediately after play_media (WebSocket handles it)
- Ignore PlaybackProgress WebSocket messages (polling handles position)
- Keeps refresh for playback controls (play/pause/stop) for immediate feedback

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

custom_components/emby_player/media_player.py

@@ -404,7 +404,8 @@ class EmbyMediaPlayer(CoordinatorEntity[EmbyCoordinator], MediaPlayerEntity):
             self._session_id,
             item_ids=[media_id],
         )
-        await self.coordinator.async_request_refresh()
+        # Don't refresh immediately - WebSocket will send PlaybackStart event,
+        # or polling will update state. Immediate refresh can close UI dialogs.
 
     async def async_browse_media(
         self,