fix: Gradio 6.0 compat - messages format, css/theme to launch(), dtype not torch_dtype

app.py

@@ -9,7 +9,7 @@ MODEL_ID = "reaperdoesntknow/DualMinded-Qwen3-1.7B"
 tokenizer = AutoTokenizer.from_pretrained(MODEL_ID, trust_remote_code=True)
 model = AutoModelForCausalLM.from_pretrained(
     MODEL_ID,
-    torch_dtype=torch.bfloat16,
+    dtype=torch.bfloat16,
     device_map="auto",
     trust_remote_code=True,
 )
@@ -41,11 +41,9 @@ def generate(
     
     messages = [{"role": "system", "content": system_prompt}]
     
-    # History is tuples: [[user_msg, assistant_msg], ...]
-    for user_msg, assistant_msg in history:
-        messages.append({"role": "user", "content": user_msg})
-        if assistant_msg:
-            messages.append({"role": "assistant", "content": assistant_msg})
+    # Gradio 6 messages format: list of {"role": ..., "content": ...}
+    for msg in history:
+        messages.append({"role": msg["role"], "content": msg["content"]})
     
     messages.append({"role": "user", "content": message})
     
@@ -133,7 +131,7 @@ footer { display: none !important; }
 """
 
 # --- UI ---
-with gr.Blocks(css=css, theme=gr.themes.Base(primary_hue="teal", neutral_hue="slate")) as demo:
+with gr.Blocks() as demo:
     
     gr.HTML("""
     <div class="main-header">
@@ -157,7 +155,6 @@ with gr.Blocks(css=css, theme=gr.themes.Base(primary_hue="teal", neutral_hue="sl
         height=500,
         show_label=False,
         container=True,
-        type="tuples",
     )
     
     with gr.Row():
@@ -191,13 +188,14 @@ with gr.Blocks(css=css, theme=gr.themes.Base(primary_hue="teal", neutral_hue="sl
     """)
     
     def user_message(message, history):
-        return "", history + [[message, None]]
+        history = history + [{"role": "user", "content": message}]
+        return "", history
     
     def bot_response(history, system_prompt, max_tokens, temperature, top_p, rep_penalty):
-        user_msg = history[-1][0]
+        user_msg = history[-1]["content"]
         past = history[:-1]
         response = generate(user_msg, past, system_prompt, max_tokens, temperature, top_p, rep_penalty)
-        history[-1][1] = response
+        history = history + [{"role": "assistant", "content": response}]
         return history
     
     msg.submit(
@@ -212,4 +210,4 @@ with gr.Blocks(css=css, theme=gr.themes.Base(primary_hue="teal", neutral_hue="sl
         bot_response, [chatbot, system_prompt, max_tokens, temperature, top_p, rep_penalty], chatbot
     )
 
-demo.launch()
+demo.launch(css=css, theme=gr.themes.Base(primary_hue="teal", neutral_hue="slate"))