fix: enhance WEBP support in thumbnail generation and improve error h…

…andling for image decoding

cmd/server/main.go

@@ -2863,7 +2863,7 @@ func monitorDirectoryChanges(dir string) {
 
 func generateThumbnail(originalPath, size string) error {
 	// Check if thumbnail generation is enabled
-	if !conf.Thumbnails.Enabled {
+	if (!conf.Thumbnails.Enabled) {
 		log.Debug("Thumbnail generation is disabled")
 		return nil
 	}
@@ -2949,33 +2949,42 @@ func generateThumbnailWithImaging(originalPath, thumbnailPath string, width, hei
 	ext := strings.ToLower(filepath.Ext(originalPath))
 
 	if ext == ".webp" {
-		// Open WEBP image using webp package
-		file, err := os.Open(originalPath)
-		if err != nil {
-			return fmt.Errorf("failed to open WEBP image: %w", err)
-		}
-		defer file.Close()
+			// Handle WEBP format
+			file, err := os.Open(originalPath)
+			if err != nil {
+				return fmt.Errorf("failed to open WEBP image: %w", err)
+			}
+			defer file.Close()
 
-		img, err = webp.Decode(file)
-		if err != nil {
-			return fmt.Errorf("failed to decode WEBP image: %w", err)
-		}
-	} else {
-		// Open other image formats using imaging
-		img, err = imaging.Open(originalPath)
-		if err != nil {
-			return fmt.Errorf("failed to open image: %w", err)
-		}
-	}
+			img, err = webp.Decode(file)
+			if err != nil {
+				return fmt.Errorf("failed to decode WEBP image: %w", err)
+			}
+		} else {
+			// Handle other formats using image.Decode
+			file, err := os.Open(originalPath)
+			if err != nil {
+				return fmt.Errorf("failed to open image: %w", err)
+			}
+			defer file.Close()
 
-	// Resize the image using Lanczos filter
-	thumb := imaging.Resize(img, width, height, imaging.Lanczos)
+			img, _, err = image.Decode(file)
+			if err != nil {
+				log.Errorf("Image decoding failed for %s: %v", originalPath, err)
+				return fmt.Errorf("failed to decode image: %w", err)
+			}
+		}
 
+	// Resize the image
+	thumbnail := imaging.Resize(img, width, height, imaging.Lanczos)
+
 	// Save the thumbnail
-	err = imaging.Save(thumb, thumbnailPath)
+	err = imaging.Save(thumbnail, thumbnailPath)
 	if err != nil {
-		return fmt.Errorf("failed to save thumbnail: %v", err)
+		return fmt.Errorf("failed to save thumbnail: %w", err)
 	}
+
+	log.Infof("Thumbnail generated successfully for %s", originalPath)
 	return nil
 }