🔧 修复Gradio主题设置错误

问题解决:
- TypeError: Base.set() got an unexpected keyword argument 'border_color_secondary'
- Gradio主题API兼容性问题

解决方案:
- 简化主题设置，使用Gradio内置的 'dark' 主题
- 移除不兼容的自定义主题参数设置
- 保留完整的自定义CSS样式控制，确保暗色效果

技术细节:
- 从自定义 gr.themes.Base() 改为内置 theme='dark'
- 移除 border_color_secondary, text_color_primary 等不兼容参数
- CSS变量和样式保持不变，继续提供完整暗色主题体验

现在应该能正常启动，暗色主题效果由CSS完全控制！

app.py

@@ -563,22 +563,7 @@ def create_space_ui() -> gr.Blocks:
     }
     """
 
-    # 创建暗色主题
-    dark_theme = gr.themes.Base(
-        primary_hue="blue",
-        secondary_hue="gray",
-        neutral_hue="gray",
-    ).set(
-        background_fill_primary="#0d1117",
-        background_fill_secondary="#161b22",
-        border_color_primary="#30363d",
-        border_color_secondary="#21262d",
-        color_accent_soft="#0969da",
-        text_color_primary="#f0f6fc",
-        text_color_secondary="#8b949e",
-    )
-    
-    with gr.Blocks(css=custom_css, title="🎙️ MOSS-TTSD | Hugging Face Space", theme=dark_theme) as demo:
+    with gr.Blocks(css=custom_css, title="🎙️ MOSS-TTSD | Hugging Face Space", theme="dark") as demo:
         gr.HTML(
             """
             <div class="header">