Fix global declaration in LoRA setter

app.py

@@ -271,6 +271,7 @@ def attach_lora(pipeline: ZImagePipeline) -> Tuple[bool, str | None]:
 
 
 def set_lora_scale(pipeline: ZImagePipeline, scale: float) -> None:
+    global lora_adapter_name
     weight = max(float(scale), 0.0)
     adapter = lora_adapter_name or "default"
     compiled_transformer = None
@@ -292,7 +293,6 @@ def set_lora_scale(pipeline: ZImagePipeline, scale: float) -> None:
             else:
                 present_names = []
             if present_names:
-                global lora_adapter_name
                 lora_adapter_name = present_names[0]
                 adapter = lora_adapter_name
                 try: