diff --git a/data/chat/test/12312.jsonl b/data/chat/test/12312.jsonl
new file mode 100644
index 0000000..e69de29
diff --git a/data/chat/test/3111.jsonl b/data/chat/test/33211.jsonl
similarity index 100%
rename from data/chat/test/3111.jsonl
rename to data/chat/test/33211.jsonl
diff --git a/frontend-react/src/App.jsx b/frontend-react/src/App.jsx
index a5f6df2..e7aec7f 100644
--- a/frontend-react/src/App.jsx
+++ b/frontend-react/src/App.jsx
@@ -1,5 +1,5 @@
 import React, { useState } from 'react';
-import Toolbar from './components/Toolbar/Toolbar';
+import Toolbar from './components/ToolBar/ToolBar';
 import ChatBox from './components/ChatBox/ChatBox';
 import DicePanel from './components/DicePanel/DicePanel';
 import ImageDisplay from './components/ImageDisplay/ImageDisplay';
@@ -7,7 +7,6 @@ import PresetPanel from './components/PresetPanel/PresetPanel';
 import './index.css';
 
 function App() {
-  const [isToolbarExpanded, setIsToolbarExpanded] = useState(false);
   const [selectedRole, setSelectedRole] = useState(null);
   const [selectedChat, setSelectedChat] = useState(null);
 
@@ -24,11 +23,8 @@ function App() {
   return (
     <div className="app">
       <Toolbar
-        isExpanded={isToolbarExpanded}
-        onToggle={() => setIsToolbarExpanded(!isToolbarExpanded)}
         onRoleChange={handleRoleChange}
         onChatChange={handleChatChange}
-        selectedRole={selectedRole}
       />
 
       {/* 主内容容器 */}
diff --git a/frontend-react/src/components/ChatBox/ChatBox.css b/frontend-react/src/components/ChatBox/ChatBox.css
index 0d79dcf..2f7d178 100644
--- a/frontend-react/src/components/ChatBox/ChatBox.css
+++ b/frontend-react/src/components/ChatBox/ChatBox.css
@@ -2,18 +2,19 @@
 
 /* React 组件根容器 */
 .chat-box {
-  height: 95%;
+  height: 100%; /* 修改为100%，填满父容器 */
   width: 100%;
   display: flex;
   flex-direction: column;
   background-color: #fafafa;
+  overflow: hidden; /* 防止内容溢出 */
 }
 
 /* 消息列表容器 */
 .chat-messages {
   flex: 1;
   min-height: 0;
-  max-height: 100%;
+  max-height: calc(95vh - 62px); /* 减去输入区域的高度 */
   overflow-y: auto;
   padding: 20px;
   padding-top: 60px;
@@ -147,7 +148,7 @@
   color: #333;
 }
 
-/* 消息工具栏 */
+/* 消息工具栏 - 优化布局使图标更紧凑 */
 .message-toolbar {
   display: flex;
   align-items: center;
@@ -172,7 +173,7 @@
 
 .toolbar-buttons {
   display: flex;
-  gap: 5px;
+  gap: 3px; /* 减少图标之间的间距 */
   margin: 0 5px;
 }
 
@@ -355,13 +356,17 @@
   background-color: #fff;
   border-top: 1px solid #ddd;
   padding: 10px 20px;
-  flex: 0 0 auto;
+  height: 62px; /* 明确设置高度 */
+  flex-shrink: 0; /* 防止被压缩 */
   display: flex;
   align-items: flex-end;
   gap: 10px;
   width: 100%;
+  position: relative;
+  z-index: 10;
 }
 
+
 .chat-input-area {
   flex: 1;
   display: flex;
diff --git a/frontend-react/src/components/ToolBar/ToolBar.css b/frontend-react/src/components/ToolBar/ToolBar.css
index 0f72aef..d23497f 100644
--- a/frontend-react/src/components/ToolBar/ToolBar.css
+++ b/frontend-react/src/components/ToolBar/ToolBar.css
@@ -1,80 +1,69 @@
 /* ==================== 顶部工具栏区域 ==================== */
 
 .toolbar {
-  position: absolute;
+  position: fixed;
   top: 0;
   left: 0;
   right: 0;
   height: 50px;
   background-color: #fff;
-  border-bottom: 1px solid #ddd;
-  padding: 0;
+  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
+  z-index: 1000;
   display: flex;
   align-items: center;
-  justify-content: flex-end;
-  z-index: 100;
-  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
-  transition: height 0.3s ease;
+  padding: 0 20px;
+  justify-content: flex-start; /* 确保内容从左到右排列 */
+  transition: all 0.3s ease;
 }
 
-.toolbar.expanded {
-  height: auto;
-  max-height: 300px;
-  overflow-y: auto;
-  padding-bottom: 10px;
+/* 工具栏图标容器 */
+.toolbar-icons {
+  display: flex;
+  align-items: center;
+  gap: 15px;
+  margin-right: auto; /* 添加这行，确保图标靠左 */
 }
 
-.toolbar-content {
-  display: none;
-  width: 100%;
-  padding: 10px 20px;
-}
-
-.toolbar.expanded .toolbar-content {
-  display: block;
-}
-
-.toolbar-toggle-btn {
-  position: absolute;
-  right: 0;
-  top: 0;
-  height: 50px;
-  width: 50px;
-  background: none;
-  border: none;
-  border-left: 1px solid #ddd;
-  cursor: pointer;
-  font-size: 0.8rem;
-  color: #666;
+/* 工具栏图标 */
+.toolbar-icon {
+  width: 36px;
+  height: 36px;
+  border-radius: 6px;
   display: flex;
   align-items: center;
   justify-content: center;
-  z-index: 101;
+  cursor: pointer;
+  transition: all 0.2s ease;
+  font-size: 18px;
+  color: #555;
+  background-color: #f5f5f5;
 }
 
-.toolbar-toggle-btn:hover {
-  background-color: #f5f5f5;
+.toolbar-icon:hover {
+  background-color: #e6f7ff;
+  color: #1890ff;
+  transform: translateY(-2px);
+  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
 }
 
 /* ==================== 下拉框样式 ==================== */
 
 /* 工具栏下拉框容器 */
 .toolbar-dropdown {
-  margin-bottom: 15px;
+  margin-bottom: 10px;
 }
 
 .toolbar-dropdown label {
   display: block;
   margin-bottom: 5px;
-  font-size: 14px;
+  font-size: 13px;
   color: #333;
+  font-weight: 500;
 }
 
 /* 下拉框容器 */
 .dropdown-container {
   position: relative;
-  width: 100%;
-  max-width: 300px;
 }
 
 /* 下拉框触发器 */
@@ -83,16 +72,28 @@
   justify-content: space-between;
   align-items: center;
   padding: 8px 12px;
-  background-color: #f5f5f5;
-  border: 1px solid #ddd;
-  border-radius: 4px;
+  background-color: #fff;
+  border: 1px solid #e0e0e0;
+  border-radius: 6px;
   cursor: pointer;
-  font-size: 14px;
+  font-size: 13px;
+  transition: all 0.2s ease;
+  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
+}
+
+.dropdown-trigger:hover {
+  border-color: #1890ff;
+  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
 }
 
 .dropdown-arrow {
   margin-left: 8px;
-  font-size: 12px;
+  font-size: 10px;
+  transition: transform 0.2s ease;
+}
+
+.dropdown-trigger.open .dropdown-arrow {
+  transform: rotate(180deg);
 }
 
 /* 下拉菜单 */
@@ -100,23 +101,36 @@
   position: absolute;
   top: 100%;
   left: 0;
-  width: 100%;
+  min-width: 180px;
   background-color: white;
-  border: 1px solid #ddd;
-  border-radius: 4px;
-  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
-  z-index: 10;
-  max-height: 200px;
-  overflow-y: auto;
-  margin-top: 5px;
+  border: 1px solid #e0e0e0;
+  border-radius: 6px;
+  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
+  z-index: 1001;
+  margin-top: 8px;
+  padding: 5px 0;
+  opacity: 0;
+  transform: translateY(-10px);
+  transition: opacity 0.2s ease, transform 0.2s ease;
+  pointer-events: none;
+}
+
+.dropdown-menu.visible {
+  opacity: 1;
+  transform: translateY(0);
+  pointer-events: auto;
 }
 
 /* 下拉菜单项 */
 .dropdown-item {
-  padding: 8px 12px;
+  padding: 10px 15px;
   cursor: pointer;
   position: relative;
   font-size: 14px;
+  transition: background-color 0.2s ease;
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
 }
 
 .dropdown-item:hover {
@@ -126,6 +140,7 @@
 .dropdown-item.selected {
   background-color: #e6f7ff;
   color: #1890ff;
+  font-weight: 500;
 }
 
 /* 嵌套下拉框 */
@@ -133,16 +148,60 @@
   position: absolute;
   left: 100%;
   top: 0;
-  width: 100%;
+  min-width: 180px;
   background-color: white;
-  border: 1px solid #ddd;
-  border-radius: 4px;
-  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
-  z-index: 11;
-  max-height: 200px;
-  overflow-y: auto;
+  border: 1px solid #e0e0e0;
+  border-radius: 6px;
+  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
+  z-index: 1002;
+  margin-left: 5px;
+  padding: 5px 0;
+  opacity: 0;
+  transform: translateX(-10px);
+  transition: opacity 0.2s ease, transform 0.2s ease;
+  pointer-events: none;
+  /* 移除滚动条相关设置，让下拉框根据内容自动扩展 */
 }
 
-.nested-dropdown .dropdown-item {
-  padding-left: 20px;
+.nested-dropdown.visible {
+  opacity: 1;
+  transform: translateX(0);
+  pointer-events: auto;
+}
+
+/* 添加指示箭头 */
+.dropdown-item.has-children::after {
+  content: '›';
+  font-size: 18px;
+  color: #999;
+  margin-left: 8px;
+  font-weight: 300;
+}
+
+.dropdown-item.selected.has-children::after {
+  color: #1890ff;
+}
+
+/* 主内容区域 */
+.main-container {
+  margin-top: 50px; /* 为固定工具栏留出空间 */
+  height: calc(100vh - 50px);
+  display: flex;
+  overflow: hidden;
+}
+
+/* 加载动画 */
+.loading-spinner {
+  display: inline-block;
+  width: 16px;
+  height: 16px;
+  border: 2px solid rgba(24, 144, 255, 0.2);
+  border-radius: 50%;
+  border-top-color: #1890ff;
+  animation: spin 1s ease-in-out infinite;
+  margin-right: 8px;
+}
+
+@keyframes spin {
+  to { transform: rotate(360deg); }
 }
diff --git a/frontend-react/src/components/ToolBar/ToolBar.jsx b/frontend-react/src/components/ToolBar/ToolBar.jsx
index 0479b15..7fae928 100644
--- a/frontend-react/src/components/ToolBar/ToolBar.jsx
+++ b/frontend-react/src/components/ToolBar/ToolBar.jsx
@@ -1,9 +1,7 @@
-import React, { useState } from 'react';
-import './Toolbar.css';
+import React, { useState, useEffect, useRef } from 'react';
+import './ToolBar.css';
 
 const Toolbar = ({
-  isExpanded,
-  onToggle,
   onRoleChange,
   onChatChange
 }) => {
@@ -11,107 +9,175 @@ const Toolbar = ({
   const [selectedChat, setSelectedChat] = useState(null);
   const [isDropdownOpen, setIsDropdownOpen] = useState(false);
   const [roleData, setRoleData] = useState({});
+  const [hoveredRole, setHoveredRole] = useState(null);
+  const [isLoading, setIsLoading] = useState(false);
+  const dropdownRef = useRef(null);
 
   // 获取角色和聊天数据
-const fetchRoleData = async () => {
-  console.log('开始获取角色数据...');
-  try {
-    const response = await fetch('/api/tool_bar/get_all_role_and_chat', {
-      method: 'GET',
-      headers: {
-        'Cache-Control': 'no-cache',
-        'Pragma': 'no-cache',
-        'Expires': '0'
+  const fetchRoleData = async () => {
+    setIsLoading(true);
+    console.log('开始获取角色数据...');
+    try {
+      const response = await fetch('/api/tool_bar/get_all_role_and_chat', {
+        method: 'GET',
+        headers: {
+          'Cache-Control': 'no-cache',
+          'Pragma': 'no-cache',
+          'Expires': '0'
+        }
+      });
+      console.log('响应状态:', response.status);
+      const data = await response.json();
+      console.log('获取到的数据:', data);
+      setRoleData(data);
+    } catch (error) {
+      console.error('获取角色数据失败:', error);
+    } finally {
+      setIsLoading(false);
+    }
+  };
+
+  // 点击外部关闭下拉菜单
+  useEffect(() => {
+    const handleClickOutside = (event) => {
+      if (dropdownRef.current && !dropdownRef.current.contains(event.target)) {
+        setIsDropdownOpen(false);
+        setHoveredRole(null);
       }
-    });
-    console.log('响应状态:', response.status);
-    const data = await response.json();
-    console.log('获取到的数据:', data);
-    setRoleData(data);
-  } catch (error) {
-    console.error('获取角色数据失败:', error);
-  }
-};
+    };
+
+    document.addEventListener('mousedown', handleClickOutside);
+    return () => {
+      document.removeEventListener('mousedown', handleClickOutside);
+    };
+  }, []);
 
   // 处理下拉框展开/收起
-    const handleDropdownToggle = async () => {
-        await fetchRoleData();
-      setIsDropdownOpen(!isDropdownOpen);
-    };
+  const handleDropdownToggle = () => {
+    // 每次点击都重新获取数据
+    fetchRoleData();
+    setIsDropdownOpen(!isDropdownOpen);
+  };
 
   // 处理角色选择
   const handleRoleSelect = (role) => {
     setSelectedRole(role);
-    setSelectedChat(null);
     if (onRoleChange) {
       onRoleChange(role);
     }
+
+    // 如果该角色有聊天记录，默认选择第一个
+    if (roleData[role] && roleData[role].length > 0) {
+      const firstChat = roleData[role][0];
+      setSelectedChat(firstChat);
+      if (onChatChange) {
+        onChatChange(role, firstChat);
+      }
+    } else {
+      setSelectedChat(null);
+    }
   };
 
   // 处理聊天选择
   const handleChatSelect = (chat) => {
     setSelectedChat(chat);
     setIsDropdownOpen(false);
+    setHoveredRole(null);
     if (onChatChange) {
       onChatChange(selectedRole, chat);
     }
   };
 
+  // 处理角色项悬停
+  const handleRoleHover = (role) => {
+    setHoveredRole(role);
+  };
+
+  // 处理角色项离开
+  const handleRoleLeave = () => {
+    // 不立即清除hoveredRole，以便用户可以移动到二级菜单
+  };
+
+  // 处理二级菜单进入
+  const handleNestedMenuEnter = () => {
+    // 防止鼠标移动时菜单消失
+  };
+
+  // 处理二级菜单离开
+  const handleNestedMenuLeave = () => {
+    setHoveredRole(null);
+  };
+
   return (
-    <div className={`toolbar ${isExpanded ? 'expanded' : ''}`}>
-      <button
-        className="toolbar-toggle-btn"
-        onClick={onToggle}
-      >
-        {isExpanded ? '▼' : '▲'}
-      </button>
+    <div className="toolbar">
+      <div className="toolbar-icons">
+        {/* Logo图标 */}
+        <div className="toolbar-icon" title="首页">
+          🤖
+        </div>
 
-      {isExpanded && (
-        <div className="toolbar-content">
-          <div className="toolbar-dropdown">
-            <label>选择角色</label>
-            <div className="dropdown-container">
-              <div
-                className="dropdown-trigger"
-                onClick={handleDropdownToggle}
-              >
-                {selectedRole || '选择角色'}
-                <span className="dropdown-arrow">▼</span>
-              </div>
+        {/* 角色选择下拉框 */}
+        <div className="dropdown-container" ref={dropdownRef}>
+          <div
+            className="toolbar-icon"
+            onClick={handleDropdownToggle}
+            title="选择角色"
+          >
+            👤
+          </div>
 
-              {isDropdownOpen && (
-                <div className="dropdown-menu">
-                  {Object.keys(roleData).map(role => (
-                    <div
-                      key={role}
-                      className={`dropdown-item ${selectedRole === role ? 'selected' : ''}`}
-                      onClick={() => handleRoleSelect(role)}
-                    >
-                      {role}
-                      {selectedRole === role && (
-                        <div className="nested-dropdown">
-                          {roleData[role].map(chat => (
-                            <div
-                              key={chat}
-                              className={`dropdown-item ${selectedChat === chat ? 'selected' : ''}`}
-                              onClick={(e) => {
-                                e.stopPropagation();
-                                handleChatSelect(chat);
-                              }}
-                            >
-                              {chat}
-                            </div>
-                          ))}
-                        </div>
-                      )}
-                    </div>
-                  ))}
+          {isDropdownOpen && (
+            <div className="dropdown-menu visible">
+              {isLoading ? (
+                <div className="dropdown-item">
+                  加载中...
                 </div>
+              ) : (
+                Object.keys(roleData).map(role => (
+                  <div
+                    key={role}
+                    className={`dropdown-item ${selectedRole === role ? 'selected' : ''} ${roleData[role] && roleData[role].length > 0 ? 'has-children' : ''}`}
+                    onClick={() => handleRoleSelect(role)}
+                    onMouseEnter={() => handleRoleHover(role)}
+                    onMouseLeave={handleRoleLeave}
+                  >
+                    {role}
+                    {/* 当悬停在角色上时显示二级菜单 */}
+                    {hoveredRole === role && roleData[role] && roleData[role].length > 0 && (
+                      <div
+                        className={`nested-dropdown visible`}
+                        onMouseEnter={handleNestedMenuEnter}
+                        onMouseLeave={handleNestedMenuLeave}
+                      >
+                        {roleData[role].map(chat => (
+                          <div
+                            key={chat}
+                            className={`dropdown-item ${selectedChat === chat ? 'selected' : ''}`}
+                            onClick={(e) => {
+                              e.stopPropagation();
+                              handleChatSelect(chat);
+                            }}
+                          >
+                            {chat}
+                          </div>
+                        ))}
+                      </div>
+                    )}
+                  </div>
+                ))
               )}
             </div>
-          </div>
+          )}
         </div>
-      )}
+
+        {/* 其他工具栏图标 */}
+        <div className="toolbar-icon" title="设置">
+          ⚙️
+        </div>
+        <div className="toolbar-icon" title="帮助">
+          ❓
+        </div>
+      </div>
     </div>
   );
 };
diff --git a/frontend-react/src/index.css b/frontend-react/src/index.css
index 6a889cb..e025004 100644
--- a/frontend-react/src/index.css
+++ b/frontend-react/src/index.css
@@ -1,99 +1,61 @@
-/* ==================== 全局样式 ==================== */
-
-/* 全局重置与基础设置 */
+/* 重置样式 */
 * {
-  box-sizing: border-box;
   margin: 0;
   padding: 0;
+  box-sizing: border-box;
 }
 
-html, body, #root {
+html, body, .app {
   height: 100%;
   width: 100%;
-  overflow: hidden; /* 禁止全局滚动 */
-  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
-  background-color: #f5f5f5;
-  color: #333;
+  overflow: hidden; /* 防止出现滚动条 */
 }
 
-/* 布局容器 */
-#root {
+.app {
   display: flex;
   flex-direction: column;
-  position: relative;
-  height: 100%;
-  width: 100%;
 }
 
-/* 滚动条美化 */
-::-webkit-scrollbar {
-  width: 6px;
-  height: 6px;
-}
-::-webkit-scrollbar-track {
-  background: transparent;
-}
-::-webkit-scrollbar-thumb {
-  background: #ccc;
-  border-radius: 3px;
-}
-::-webkit-scrollbar-thumb:hover {
-  background: #aaa;
-}
-
-/* ==================== 主内容区域 ==================== */
-
+/* 主内容区域 */
 .main-container {
-  position: absolute;
-  top: 50px;
-  bottom: 0;
-  left: 0;
-  right: 0;
-  height: 100%;
-  width: 100%;
+  flex: 1; /* 这会让主容器占据剩余的所有空间 */
   display: flex;
-  overflow: hidden;
+  overflow: hidden; /* 防止内容溢出 */
+  height: 100%; /* 确保高度填满 */
 }
 
 /* 左侧栏 */
 .sidebar-left {
-  width: 20%;
-  background-color: #fff;
-  border-right: 1px solid #ddd;
-  overflow-y: auto;
-  height: 100%;
+  width: 250px; /* 或者你想要的宽度 */
+  height:  继承父元素高度; /* 确保高度填满 */
+  overflow-y: auto; /* 内容过多时显示滚动条 */
 }
 
-/* 中间栏：聊天框 */
+/* 中间聊天区域 */
 .chat-area {
-  flex: 3;
-  background-color: #fafafa;
-  height: 100%;
+  flex: 1; /* 占据剩余空间 */
+  height: 100%; /* 确保高度填满 */
   display: flex;
   flex-direction: column;
-  overflow: hidden;
-  position: relative;
+  overflow: hidden; /* 防止内容溢出 */
 }
 
 /* 右侧栏 */
 .sidebar-right {
-  width: 20%;
-  background-color: #fff;
-  border-left: 1px solid #ddd;
+  width: 300px; /* 或者你想要的宽度 */
+  height: 100%; /* 确保高度填满 */
   display: flex;
   flex-direction: column;
-  height: 100%;
-  overflow: hidden;
-}
-
-/* 右侧上下分割 */
-.right-top, .right-bottom {
-  flex: 1;
-  overflow-y: auto;
-  padding: 10px;
-  min-height: 0;
 }
 
+/* 右侧栏顶部 */
 .right-top {
-  border-bottom: 1px solid #ddd;
+  flex: 1; /* 占据剩余空间 */
+  overflow-y: auto;
+}
+
+/* 右侧栏底部 */
+.right-bottom {
+  height: 200px; /* 或者你想要的高度 */
+  overflow-y: auto;
 }