Enhance run_training function in app.py to emit an initial log message upon invocation. This update improves user feedback by confirming the start of the training process and maintains existing error handling for required output names.

app.py

@@ -664,9 +664,11 @@ def run_training(
 ) -> Iterable[tuple]:
     global _ACTIVE_PROC, _ACTIVE_PGID
     # Basic validation
-    log_buf = ""
+    log_buf = "[QIE] Start Training invoked.\n"
     ckpts: List[str] = []
     artifacts: List[str] = []
+    # Emit an initial line so UI can confirm invocation
+    yield (log_buf, ckpts, artifacts)
     if not output_name.strip():
         log_buf += "[ERROR] OUTPUT NAME is required.\n"
         yield (log_buf, ckpts, artifacts)