Update ui_manager.py

ui_manager.py

@@ -263,15 +263,18 @@ class UIManager:
         self._gradio_version = gr.__version__
         self._gradio_major = int(self._gradio_version.split('.')[0])
 
-        # Both Gradio 4.x and 5.x use css/theme in Blocks() constructor
+        # Compatible with both Gradio 4.x and 5.x
+        # Note: css parameter support varies, so we inject CSS via HTML instead
         blocks_kwargs = {
-            "css": self._css,
             "title": "SceneWeaver - AI Background Generator",
             "theme": gr.themes.Soft()
         }
 
         with gr.Blocks(**blocks_kwargs) as interface:
 
+            # Inject CSS (compatible with all Gradio versions)
+            gr.HTML(f"<style>{self._css}</style>")
+
             # Header
             gr.HTML("""
             <div class="main-header">
@@ -987,4 +990,4 @@ class UIManager:
         tips = self.inpainting_template_manager.get_usage_tips(template_key)
         if tips:
             return "**Tips:**\n" + "\n".join(f"- {tip}" for tip in tips)
-        return ""
+        return ""