Show scan overlay after page reload

- Add is_scanning state tracking in AnimeService
- Add get_scan_status method to AnimeService
- Add /api/anime/scan/status endpoint to check scan state
- Add checkActiveScanStatus in JS to restore overlay on reconnect
- All 1024 tests passing

src/server/web/static/js/app.js

@@ -193,6 +193,9 @@ class AniWorldApp {
             
             this.showToast(this.localization.getText('connected-server'), 'success');
             this.updateConnectionStatus();
+            
+            // Check if a scan is currently in progress (e.g., after page reload)
+            this.checkActiveScanStatus();
         });
 
         this.socket.on('disconnect', () => {
@@ -1278,6 +1281,43 @@ class AniWorldApp {
         }
     }
 
+    /**
+     * Check if a scan is currently in progress (useful after page reload)
+     * and show the progress overlay if so
+     */
+    async checkActiveScanStatus() {
+        try {
+            const response = await this.makeAuthenticatedRequest('/api/anime/scan/status');
+            if (!response || !response.ok) {
+                console.log('Could not fetch scan status');
+                return;
+            }
+            
+            const data = await response.json();
+            console.log('Scan status:', data);
+            
+            if (data.is_scanning) {
+                // A scan is in progress, show the overlay
+                this.showScanProgressOverlay({
+                    directory: data.directory,
+                    total_items: data.total_items
+                });
+                
+                // Update with current progress
+                this.updateScanProgressOverlay({
+                    directories_scanned: data.directories_scanned,
+                    files_found: data.directories_scanned,
+                    current_directory: data.current_directory,
+                    total_items: data.total_items
+                });
+                
+                this.updateProcessStatus('rescan', true);
+            }
+        } catch (error) {
+            console.error('Error checking scan status:', error);
+        }
+    }
+
     showLoading() {
         document.getElementById('loading-overlay').classList.remove('hidden');
     }