feat: Add NFO UI features (Task 6)

- Extended AnimeSummary model with NFO fields (has_nfo, nfo_created_at, nfo_updated_at, tmdb_id, tvdb_id)
- Updated list_anime endpoint to fetch and return NFO data from database
- Added NFO status badges to series cards (green=exists, gray=missing)
- Created nfo-manager.js module with createNFO, refreshNFO, viewNFO operations
- Added NFO action buttons to series cards (Create/View/Refresh)
- Integrated WebSocket handlers for real-time NFO events (creating, completed, failed)
- Added CSS styles for NFO badges and action buttons
- All 34 NFO API tests passing, all 32 anime endpoint tests passing
- Documented in docs/task6_status.md (90% complete, NFO status page deferred)

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

@@ -237,6 +237,35 @@ AniWorld.IndexSocketHandler = (function() {
             AniWorld.ConfigManager.hideStatus();
             AniWorld.UI.showToast('Download cancelled', 'warning');
         });
+
+        // NFO events
+        socket.on('nfo_creating', function(data) {
+            console.log('NFO creation started:', data);
+            AniWorld.UI.showToast(
+                'Creating NFO for ' + (data.series_name || data.series_key),
+                'info'
+            );
+        });
+
+        socket.on('nfo_completed', function(data) {
+            console.log('NFO creation completed:', data);
+            AniWorld.UI.showToast(
+                'NFO created for ' + (data.series_name || data.series_key),
+                'success'
+            );
+            // Reload series to reflect new NFO status
+            if (AniWorld.SeriesManager && AniWorld.SeriesManager.loadSeries) {
+                AniWorld.SeriesManager.loadSeries();
+            }
+        });
+
+        socket.on('nfo_failed', function(data) {
+            console.error('NFO creation failed:', data);
+            AniWorld.UI.showToast(
+                'NFO creation failed: ' + (data.message || data.error || 'Unknown error'),
+                'error'
+            );
+        });
     }
 
     /**