Add frontend UI for async series loading

- Add SERIES_LOADING_UPDATE WebSocket event
- Update series cards to display loading indicators
- Add real-time status updates via WebSocket
- Include progress tracking (episodes, NFO, logo, images)
- Add CSS styling for loading states
- Implement updateSeriesLoadingStatus function

src/server/web/static/js/index/socket-handler.js

@@ -133,6 +133,14 @@ AniWorld.IndexSocketHandler = (function() {
             AniWorld.ScanManager.updateProcessStatus('download', false, true);
         });
 
+        // Series loading events
+        socket.on(WS_EVENTS.SERIES_LOADING_UPDATE, function(data) {
+            console.log('Series loading update:', data);
+            if (AniWorld.SeriesManager && AniWorld.SeriesManager.updateSeriesLoadingStatus) {
+                AniWorld.SeriesManager.updateSeriesLoadingStatus(data);
+            }
+        });
+
         // Download events
         socket.on(WS_EVENTS.DOWNLOAD_STARTED, function(data) {
             isDownloading = true;