fix: enhance logging for Redis operations and improve error messages

cmd/server/main.go

@@ -2727,7 +2727,7 @@ func precacheStoragePath(dir string) error {
 		data, err := redisClient.Get(context.Background(), "directory_index").Result()
 		if err == nil {
 			var index []FileMetadata
-			err = json.Unmarshal([]byte(data), &index) // Added the target variable
+			err = json.Unmarshal([]byte(data), &index)
 			if err == nil {
 				for _, metadata := range index {
 					fileInfoCache.Set(metadata.FilePath, metadata.FileInfo, cache.DefaultExpiration)
@@ -2736,9 +2736,9 @@ func precacheStoragePath(dir string) error {
 				log.Info("Loaded directory index from Redis")
 				return nil
 			}
-			log.Warn("Failed to unmarshal directory index from Redis")
+			log.Warnf("Failed to unmarshal directory index from Redis: %v", err)
 		} else {
-			log.Warn("Failed to load directory index from Redis:", err)
+			log.Warnf("Failed to load directory index from Redis: %v", err)
 		}
 	}
 
@@ -2758,9 +2758,9 @@ func precacheStoragePath(dir string) error {
 			log.Info("Loaded directory index from static index file")
 			return nil
 		}
-		log.Warn("Failed to decode static index file:", err)
+		log.Warnf("Failed to decode static index file: %v", err)
 	} else {
-		log.Warn("Static index file not found:", err)
+		log.Warnf("Static index file not found: %v", err)
 	}
 
 	// Perform full directory scan
@@ -2793,10 +2793,10 @@ func precacheStoragePath(dir string) error {
 			if err == nil {
 				log.Info("Saved directory index to Redis")
 			} else {
-				log.Warn("Failed to save directory index to Redis:", err)
+				log.Warnf("Failed to save directory index to Redis: %v", err)
 			}
 		} else {
-			log.Warn("Failed to marshal directory index for Redis:", err)
+			log.Warnf("Failed to marshal directory index for Redis: %v", err)
 		}
 	}
 
@@ -2809,10 +2809,10 @@ func precacheStoragePath(dir string) error {
 		if err == nil {
 			log.Info("Saved directory index to static index file")
 		} else {
-			log.Warn("Failed to encode directory index to static index file:", err)
+			log.Warnf("Failed to encode directory index to static index file: %v", err)
 		}
 	} else {
-		log.Warn("Failed to create static index file:", err)
+		log.Warnf("Failed to create static index file: %v", err)
 	}
 
 	// Monitor directory for changes
@@ -2861,7 +2861,7 @@ 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
 	}