添加长期存储，流式检查

frontend/components/sidebar.py

@@ -14,14 +14,22 @@ from frontend.config import config
 
 def render_sidebar():
     """渲染左侧栏"""
-    _render_user_section()
+    # 顶部放置新对话按钮，像 ChatGPT/DeepSeek 一样显眼
+    _render_history_actions()
     st.divider()
+    
+    # 历史列表
     _render_history_section()
+    
+    # 底部放用户部分
+    st.divider()
+    _render_user_section()
 
 
 def _render_user_section():
     """渲染用户登录区域"""
-    st.header("👤 用户")
+    # st.header("👤 用户") # 移除显眼的标题，改用更柔和的 caption
+    st.caption("👤 用户管理")
     
     if not AppState.is_logged_in():
         _render_login_form()
@@ -32,58 +40,62 @@ def _render_user_section():
 def _render_login_form():
     """渲染登录表单"""
     username = st.text_input(
-        "输入用户名（可选）",
+        "用户名",
         key="login_input",
-        placeholder="留空使用默认用户",
-        help="未登录将使用 default_user，可能导致对话污染"
+        placeholder="输入用户名...",
+        help="未登录将使用 default_user，可能导致对话污染",
+        label_visibility="collapsed"
     )
     
-    if st.button("✅ 进入", type="primary", use_container_width=True):
+    if st.button("进入", type="secondary", use_container_width=True):
         AppState.login(username)
         _refresh_threads()
         st.rerun()
     
-    st.info("💡 建议登录以隔离对话历史")
+    # st.info("💡 建议登录以隔离对话历史") # 移除多余色块
 
 
 def _render_user_info():
     """渲染用户信息"""
-    st.success(f"✅ 当前用户: `{AppState.get_user_id()}`")
+    st.markdown(f"**当前用户**: `{AppState.get_user_id()}`")
     
-    if st.button("🔄 切换用户", use_container_width=True):
+    if st.button("切换用户", type="secondary", use_container_width=True):
         AppState.logout()
+        _refresh_threads()
         st.rerun()
 
 
 def _render_history_section():
     """渲染历史对话列表"""
-    st.header("📚 对话历史")
+    col1, col2 = st.columns([3, 1])
+    with col1:
+        st.caption("📚 对话历史")
+    with col2:
+        if st.button("🔄", help="刷新列表", key="refresh_history_btn"):
+            _refresh_threads()
     
-    # 操作按钮
-    _render_history_actions()
-    
-    st.divider()
-    
-    # 历史列表
     _render_thread_list()
 
 
 def _render_history_actions():
     """渲染历史操作按钮"""
-    if st.button("🔄 刷新列表", use_container_width=True):
-        _refresh_threads()
-    
-    if st.button("➕ 新对话", type="primary", use_container_width=True):
+    # 移除了 type="primary"，让它变成普通的线框按钮，不再是大红块
+    if st.button("➕ 新对话", use_container_width=True):
         AppState.start_new_thread()
         st.rerun()
 
 
 def _render_thread_list():
     """渲染线程列表"""
+    # 仅在初次加载时拉取，或由外部主动调用 _refresh_threads() 更新
+    if "threads_loaded" not in st.session_state:
+        _refresh_threads()
+        st.session_state.threads_loaded = True
+        
     threads = AppState.get_threads()
     
     if not threads:
-        st.info("暂无对话历史")
+        st.caption("暂无对话历史")
         return
     
     for thread in threads:
@@ -98,28 +110,23 @@ def _render_thread_item(thread: dict):
         thread: 线程信息字典
     """
     thread_id = thread["thread_id"]
-    summary = thread.get("summary", "空对话")
-    message_count = thread.get("message_count", 0)
-    last_updated = thread.get("last_updated", "")
-    
-    # 格式化时间
-    time_str = _format_time(last_updated)
+    summary = thread.get("summary", "新对话")
     
     # 判断是否为当前线程
     is_current = thread_id == AppState.get_current_thread_id()
-    button_type = "primary" if is_current else "secondary"
     
-    # 截断摘要
-    summary_display = summary[:config.summary_max_length]
-    if len(summary) > config.summary_max_length:
-        summary_display += "..."
+    # 根据是否当前线程改变按钮样式
+    btn_type = "primary" if is_current else "tertiary"
+    
+    # 为了避免内容过长，截断摘要
+    display_text = summary[:15] + "..." if len(summary) > 15 else summary
     
-    # 渲染按钮
     if st.button(
-        f"💬 {summary_display}\n\n🕐 {time_str} | {message_count}条",
+        display_text,
         key=f"thread_{thread_id}",
+        help=f"完整摘要: {summary}",
         use_container_width=True,
-        type=button_type
+        type=btn_type
     ):
         _load_thread(thread_id)