Only log to media_clicks when user_id is provided

- Skip media_clicks logging if user_id is None or empty
- Regular MongoDB logging (api_calls, image_uploads, colorizations) always happens regardless of user_id
- This ensures media_clicks only tracks authenticated/identified users

app/database.py

@@ -317,7 +317,16 @@ def log_media_click(
     endpoint_path: Optional[str] = None, 
     default_category_id: Optional[str] = None, 
 ) -> bool: 
-    """Log media clicks into the admin MongoDB (media_clicks collection).""" 
+    """Log media clicks into the admin MongoDB (media_clicks collection).
+    
+    Only logs if user_id is provided. If user_id is None or empty, returns False without logging.
+    Regular MongoDB logging (api_calls, image_uploads, colorizations) always happens regardless.
+    """
+    # Only log to media_clicks if user_id is provided
+    if not user_id or (isinstance(user_id, str) and not user_id.strip()):
+        logger.debug("Skipping media click log - user_id not provided")
+        return False
+        
     try: 
         db = get_admin_database() 
         if db is None: