Update app.py

app.py

@@ -471,13 +471,13 @@ def main():
             help="输入您想要撰写的博客主题",
             label_visibility="collapsed"
         )
-        
-        # 快捷主题选择
-        quick_topics = st.selectbox(
-            "快速选择：",
-            ["Python异步编程", "React Hooks实战", "Docker容器化", "机器学习基础", "API设计"],
-            selection_mode="single"
+
+        # ✅ 多选版本
+        quick_topics = st.multiselect(
+            "快速选择（可多选）：",
+            ["Python异步编程", "React Hooks实战", "Docker容器化", "机器学习基础", "API设计"]
         )
+
         
         if quick_topics:
             topic = quick_topics