Gradio 6.0 compatibility fix: moved css/theme to launch, removed bubble_full_width

app.py

@@ -334,7 +334,7 @@ EXAMPLES = [
 ]
 
 def build():
-    with gr.Blocks(css=DARK_CSS, theme=gr.themes.Default(primary_hue="purple"), title="Stack X Ultimate") as demo:
+    with gr.Blocks(title="Stack X Ultimate") as demo:
 
         # ── Hero ──────────────────────────────────────────────────────
         gr.HTML("""
@@ -367,18 +367,15 @@ def build():
                 "https://huggingface.co/front/assets/icons/8.svg",
                 "https://huggingface.co/front/assets/icons/13.svg"
             ),
-            bubble_full_width=False,
         )
 
         with gr.Row():
             msg = gr.Textbox(
                 placeholder="Type a message or try an example below...",
                 scale=5,
-                container=True,
-                show_label=False,
                 elem_id="main-input",
             )
-            send_btn = gr.Button("Send →", scale=1, elem_classes="send-btn")
+            send_btn = gr.Button("Send →", scale=1, elem_class="send-btn")
 
         # ── Events ────────────────────────────────────────────────────
         msg.submit(chat_fn, [msg, chat], [chat])
@@ -405,4 +402,12 @@ def build():
     return demo
 
 if __name__ == "__main__":
-    build().launch(server_name="0.0.0.0", server_port=7860, max_threads=4, show_api=False)
+    demo = build()
+    demo.launch(
+        server_name="0.0.0.0",
+        server_port=7860,
+        css=DARK_CSS,
+        theme=gr.themes.Default(primary_hue="purple"),
+        max_threads=4,
+        show_api=False,
+    )