fix: syntax error in get_frame else branch indentation

app.py

@@ -503,14 +503,15 @@ def get_frame():
                         "buffer_size": model_manager.frame_buffer.size(),
                     }
                 )
-        else:
-            return jsonify(
-                {
-                    "status": "waiting",
-                    "message": "No frame available yet",
-                    "buffer_size": model_manager.frame_buffer.size(),
-                }
-            )
+
+        # No frames available (active or spectator)
+        return jsonify(
+            {
+                "status": "waiting",
+                "message": "No frame available yet",
+                "buffer_size": model_manager.frame_buffer.size(),
+            }
+        )
     except Exception as e:
         print(f"Error in get_frame: {e}")
         import traceback