Fix indentation for the _runner function in start_training_advanced to ensure proper execution flow.

app.py

@@ -1028,7 +1028,8 @@ def start_training_advanced(
         return "❌ Dataset not ready. Please wait for bootstrap to complete."
     
     log_message = "🚀 Advanced training started with custom parameters! Check the log below for progress."
-            def _runner():
+    
+    def _runner():
         nonlocal log_message
         try:
             import subprocess