调整界面布局，将聊天历史和输入区域分为左右两侧，并优化输入框的默认提示信息

app.py

@@ -221,36 +221,15 @@ with gr.Blocks(title="Step Audio 2 Chat", theme=gr.themes.Soft()) as demo:
     )
     
     with gr.Row():
-        # 左侧：聊天历史
+        # 左侧：参数配置
         with gr.Column(scale=1):
-            gr.Markdown("### 聊天历史")
-            chatbot = gr.Chatbot(
-                label="对话",
-                height=600,
-                show_copy_button=True
-            )
-        
-        # 右侧：输入区域
-        with gr.Column(scale=1):
-            gr.Markdown("### 输入设置")
+            gr.Markdown("### 配置")
             
             system_prompt = gr.Textbox(
                 label="System Prompt",
                 placeholder="输入系统提示词...",
-                lines=3,
-                value=""
-            )
-            
-            user_text = gr.Textbox(
-                label="文本输入",
-                placeholder="输入您的消息...",
-                lines=3
-            )
-            
-            audio_file = gr.Audio(
-                label="音频输入",
-                type="filepath",
-                sources=["microphone", "upload"]
+                lines=4,
+                value="You are an expert in audio analysis, please analyze the audio content and answer the questions accurately"
             )
             
             with gr.Row():
@@ -278,9 +257,31 @@ with gr.Blocks(title="Step Audio 2 Chat", theme=gr.themes.Soft()) as demo:
                     value=0.9,
                     step=0.05
                 )
+        
+        # 右侧：对话和输入
+        with gr.Column(scale=1):
+            gr.Markdown("### 对话")
+            chatbot = gr.Chatbot(
+                label="聊天历史",
+                height=400,
+                show_copy_button=True
+            )
+            
+            user_text = gr.Textbox(
+                label="文本输入",
+                placeholder="输入您的消息...",
+                lines=2
+            )
+            
+            audio_file = gr.Audio(
+                label="音频输入",
+                type="filepath",
+                sources=["microphone", "upload"]
+            )
             
-            submit_btn = gr.Button("提交", variant="primary", size="lg")
-            clear_btn = gr.Button("清空", variant="secondary")
+            with gr.Row():
+                submit_btn = gr.Button("提交", variant="primary", size="lg")
+                clear_btn = gr.Button("清空", variant="secondary")
             
             status_text = gr.Textbox(label="状态", interactive=False, visible=False)