diff --git a/.DS_Store b/.DS_Store
index 694a98b..6e415a7 100644
Binary files a/.DS_Store and b/.DS_Store differ
diff --git a/dist.zip b/dist.zip
index 0823387..0aa4c9f 100644
Binary files a/dist.zip and b/dist.zip differ
diff --git a/src/.DS_Store b/src/.DS_Store
new file mode 100644
index 0000000..dbd07c1
Binary files /dev/null and b/src/.DS_Store differ
diff --git a/src/components/ContentViewer.jsx b/src/components/ContentViewer.jsx
index 3a08b39..bf81e75 100644
--- a/src/components/ContentViewer.jsx
+++ b/src/components/ContentViewer.jsx
@@ -77,6 +77,7 @@ const ContentViewer = ({
             <MindMap
               content={content}
               title={title}
+              initialScale={1.8}
             />
           ) : (
             <div className="empty-content">等待内容生成后查看脑图</div>
diff --git a/src/components/Dropdown.css b/src/components/Dropdown.css
new file mode 100644
index 0000000..55f9675
--- /dev/null
+++ b/src/components/Dropdown.css
@@ -0,0 +1,101 @@
+/* Dropdown Container */
+.dropdown-container {
+  position: relative;
+  display: inline-block;
+}
+
+.dropdown-trigger-wrapper {
+  cursor: pointer;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+}
+
+/* Dropdown Menu */
+.dropdown-menu-wrapper {
+  position: absolute;
+  top: calc(100% + 0.5rem);
+  background: white;
+  border-radius: 8px;
+  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
+  border: 1px solid #e2e8f0;
+  padding: 0.5rem;
+  min-width: 140px;
+  z-index: 1000;
+  display: flex;
+  flex-direction: column;
+  gap: 2px;
+  animation: dropdown-fade-in 0.2s ease;
+}
+
+@keyframes dropdown-fade-in {
+  from {
+    opacity: 0;
+    transform: translateY(-8px);
+  }
+  to {
+    opacity: 1;
+    transform: translateY(0);
+  }
+}
+
+/* Alignment */
+.dropdown-align-left {
+  left: 0;
+}
+
+.dropdown-align-right {
+  right: 0;
+}
+
+/* Menu Item */
+.dropdown-menu-item {
+  display: flex;
+  align-items: center;
+  gap: 0.75rem;
+  padding: 0.65rem 1rem;
+  border: none;
+  background: none;
+  cursor: pointer;
+  border-radius: 6px;
+  font-size: 0.9375rem;
+  font-weight: 500;
+  color: #374151;
+  text-decoration: none;
+  transition: all 0.2s ease;
+  width: 100%;
+  text-align: left;
+  white-space: nowrap;
+}
+
+.dropdown-menu-item:hover:not(:disabled) {
+  background: #f3f4f6;
+  color: #111827;
+}
+
+.dropdown-menu-item:disabled {
+  opacity: 0.5;
+  cursor: not-allowed;
+}
+
+/* Danger Item */
+.dropdown-menu-item.danger {
+  color: #dc2626;
+}
+
+.dropdown-menu-item.danger:hover:not(:disabled) {
+  background: #fef2f2;
+  color: #b91c1c;
+}
+
+/* Item Icon and Label */
+.dropdown-item-icon {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  flex-shrink: 0;
+}
+
+.dropdown-item-label {
+  flex: 1;
+}
diff --git a/src/components/Dropdown.jsx b/src/components/Dropdown.jsx
new file mode 100644
index 0000000..cc8b62b
--- /dev/null
+++ b/src/components/Dropdown.jsx
@@ -0,0 +1,81 @@
+import React, { useState, useEffect, useRef } from 'react';
+import './Dropdown.css';
+
+/**
+ * Dropdown - 通用下拉菜单组件
+ *
+ * @param {Object} props
+ * @param {React.ReactNode} props.trigger - 触发器元素（按钮）
+ * @param {Array<Object>} props.items - 菜单项数组
+ *   - label: string - 显示文本
+ *   - icon: React.ReactNode - 图标（可选）
+ *   - onClick: function - 点击回调
+ *   - className: string - 自定义样式类（可选）
+ *   - danger: boolean - 是否为危险操作（红色）
+ * @param {string} props.align - 对齐方式: 'left' | 'right'，默认 'right'
+ * @param {string} props.className - 外层容器自定义类名
+ */
+const Dropdown = ({
+  trigger,
+  items = [],
+  align = 'right',
+  className = ''
+}) => {
+  const [isOpen, setIsOpen] = useState(false);
+  const dropdownRef = useRef(null);
+
+  // 点击外部关闭下拉菜单
+  useEffect(() => {
+    const handleClickOutside = (event) => {
+      if (dropdownRef.current && !dropdownRef.current.contains(event.target)) {
+        setIsOpen(false);
+      }
+    };
+
+    if (isOpen) {
+      document.addEventListener('mousedown', handleClickOutside);
+      return () => document.removeEventListener('mousedown', handleClickOutside);
+    }
+  }, [isOpen]);
+
+  const handleTriggerClick = (e) => {
+    e.preventDefault();
+    e.stopPropagation();
+    setIsOpen(!isOpen);
+  };
+
+  const handleItemClick = (item, e) => {
+    e.preventDefault();
+    e.stopPropagation();
+    if (item.onClick) {
+      item.onClick(e);
+    }
+    setIsOpen(false);
+  };
+
+  return (
+    <div className={`dropdown-container ${className}`} ref={dropdownRef}>
+      <div className="dropdown-trigger-wrapper" onClick={handleTriggerClick}>
+        {trigger}
+      </div>
+
+      {isOpen && (
+        <div className={`dropdown-menu-wrapper dropdown-align-${align}`}>
+          {items.map((item, index) => (
+            <button
+              key={index}
+              className={`dropdown-menu-item ${item.danger ? 'danger' : ''} ${item.className || ''}`}
+              onClick={(e) => handleItemClick(item, e)}
+              disabled={item.disabled}
+            >
+              {item.icon && <span className="dropdown-item-icon">{item.icon}</span>}
+              <span className="dropdown-item-label">{item.label}</span>
+            </button>
+          ))}
+        </div>
+      )}
+    </div>
+  );
+};
+
+export default Dropdown;
diff --git a/src/components/MarkdownEditor.css b/src/components/MarkdownEditor.css
index b2a26d9..8b452e0 100644
--- a/src/components/MarkdownEditor.css
+++ b/src/components/MarkdownEditor.css
@@ -78,7 +78,7 @@
   box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
   z-index: 100;
   min-width: 160px;
-  overflow: hidden;
+  overflow: visible;
 }
 
 .dropdown-menu button {
diff --git a/src/components/MeetingTimeline.css b/src/components/MeetingTimeline.css
index 38fd360..f80ba6a 100644
--- a/src/components/MeetingTimeline.css
+++ b/src/components/MeetingTimeline.css
@@ -99,68 +99,6 @@
   margin-bottom: 0.75rem;
 }
 
-.meeting-actions {
-  position: relative;
-  margin-left: 1rem;
-  flex-shrink: 0;
-}
-
-.dropdown-trigger {
-  background: transparent;
-  border: none;
-  padding: 0.25rem;
-  border-radius: 4px;
-  cursor: pointer;
-  color: #64748b;
-  transition: all 0.3s ease;
-}
-
-.dropdown-trigger:hover {
-  background: #f1f5f9;
-  color: #334155;
-}
-
-.dropdown-menu {
-  position: absolute;
-  top: 100%;
-  right: 0;
-  background: white;
-  border-radius: 8px;
-  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
-  border: 1px solid #e2e8f0;
-  min-width: 120px;
-  z-index: 10;
-  overflow: hidden;
-}
-
-.dropdown-item {
-  display: flex;
-  align-items: center;
-  gap: 0.5rem;
-  padding: 0.75rem 1rem;
-  background: none;
-  border: none;
-  width: 100%;
-  text-align: left;
-  font-size: 0.9rem;
-  color: #334155;
-  text-decoration: none;
-  cursor: pointer;
-  transition: background 0.2s ease;
-}
-
-.dropdown-item:hover {
-  background: #f8fafc;
-}
-
-.dropdown-item.delete-item {
-  color: #ef4444;
-}
-
-.dropdown-item.delete-item:hover {
-  background: #fef2f2;
-}
-
 /* Delete Modal */
 .delete-modal-overlay {
   position: fixed;
@@ -246,13 +184,6 @@
 }
 
 /* Dropdown Menu Styles */
-.meeting-actions {
-  position: relative;
-  display: flex;
-  align-items: center;
-  gap: 0.5rem;
-}
-
 .dropdown-trigger {
   background: none;
   border: none;
@@ -271,66 +202,6 @@
   color: #334155;
 }
 
-.dropdown-menu {
-  position: absolute;
-  top: 100%;
-  right: 0;
-  background: white;
-  border-radius: 8px;
-  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
-  border: 1px solid #e2e8f0;
-  padding: 0.5rem;
-  margin-top: 0.5rem;
-  min-width: 120px;
-  z-index: 10;
-  display: flex;
-  flex-direction: column;
-  gap: 2px;
-}
-
-.dropdown-item {
-  display: flex;
-  align-items: center;
-  gap: 0.5rem;
-  padding: 0.5rem 0.75rem;
-  border: none;
-  background: none;
-  cursor: pointer;
-  border-radius: 4px;
-  font-size: 0.875rem;
-  font-weight: 500;
-  color: #374151;
-  text-decoration: none;
-  transition: all 0.2s ease;
-  width: 100%;
-  text-align: left;
-}
-
-/* 确保Link组件内的dropdown-item正确显示 */
-.dropdown-menu a {
-  text-decoration: none;
-  display: block;
-  width: 100%;
-}
-
-.dropdown-menu a .dropdown-item {
-  width: 100%;
-}
-
-.dropdown-item:hover {
-  background: #f3f4f6;
-  color: #111827;
-}
-
-.dropdown-item.delete-item {
-  color: #dc2626;
-}
-
-.dropdown-item.delete-item:hover {
-  background: #fef2f2;
-  color: #b91c1c;
-}
-
 .meeting-content {
   background: white;
   border-radius: 12px;
diff --git a/src/components/MeetingTimeline.jsx b/src/components/MeetingTimeline.jsx
index 92c685b..19865eb 100644
--- a/src/components/MeetingTimeline.jsx
+++ b/src/components/MeetingTimeline.jsx
@@ -7,23 +7,12 @@ import rehypeRaw from 'rehype-raw';
 import rehypeSanitize from 'rehype-sanitize';
 import TagDisplay from './TagDisplay';
 import ConfirmDialog from './ConfirmDialog';
+import Dropdown from './Dropdown';
 import './MeetingTimeline.css';
 
 const MeetingTimeline = ({ meetingsByDate, currentUser, onDeleteMeeting, hasMore = false, onLoadMore, loadingMore = false }) => {
   const [deleteConfirmInfo, setDeleteConfirmInfo] = useState(null);
-  const [showDropdown, setShowDropdown] = useState(null);
   const navigate = useNavigate();
-  // Close dropdown when clicking outside
-  React.useEffect(() => {
-    const handleClickOutside = () => {
-      setShowDropdown(null);
-    };
-
-    if (showDropdown) {
-      document.addEventListener('click', handleClickOutside);
-      return () => document.removeEventListener('click', handleClickOutside);
-    }
-  }, [showDropdown]);
 
   const formatDateTime = (dateTimeString) => {
     if (!dateTimeString) return '时间待定';
@@ -67,19 +56,15 @@ const MeetingTimeline = ({ meetingsByDate, currentUser, onDeleteMeeting, hasMore
     return lines.length > maxLines || summary.length > maxLength;
   };
 
-  const handleEditClick = (meetingId, e) => {
-    e.preventDefault();
-    navigate(`/meetings/edit/${meetingId}`)
-    setShowDropdown(null);
+  const handleEditClick = (meetingId) => {
+    navigate(`/meetings/edit/${meetingId}`);
   };
 
-  const handleDeleteClick = (meeting, e) => {
-    e.preventDefault();
+  const handleDeleteClick = (meeting) => {
     setDeleteConfirmInfo({
       id: meeting.meeting_id,
       title: meeting.title
     });
-    setShowDropdown(null);
   };
 
   const handleConfirmDelete = async () => {
@@ -89,12 +74,6 @@ const MeetingTimeline = ({ meetingsByDate, currentUser, onDeleteMeeting, hasMore
     setDeleteConfirmInfo(null);
   };
 
-  const toggleDropdown = (meetingId, e) => {
-    e.preventDefault();
-    e.stopPropagation();
-    setShowDropdown(showDropdown === meetingId ? null : meetingId);
-  };
-
   const sortedDates = Object.keys(meetingsByDate).sort((a, b) => new Date(b) - new Date(a));
 
   if (sortedDates.length === 0) {
@@ -142,31 +121,27 @@ const MeetingTimeline = ({ meetingsByDate, currentUser, onDeleteMeeting, hasMore
                               </h3>
                             </div>
                             {isCreator && (
-                              <div className="meeting-actions">
-                                <button 
-                                  className="dropdown-trigger"
-                                  onClick={(e) => toggleDropdown(meeting.meeting_id, e)}
-                                >
-                                  <MoreVertical size={18} />
-                                </button>
-                                {showDropdown === meeting.meeting_id && (
-                                  <div className="dropdown-menu" onClick={(e) => e.stopPropagation()}>
-                                    <button className="dropdown-item"
-                                      onClick={(e) =>handleEditClick(meeting.meeting_id, e)}
-                                    >
-                                      <Edit size={16} />
-                                      编辑
-                                    </button>
-                                    <button
-                                      className="dropdown-item delete-item"
-                                      onClick={(e) => handleDeleteClick(meeting, e)}
-                                    >
-                                      <Trash2 size={16} />
-                                      删除
-                                    </button>
-                                  </div>
-                                )}
-                              </div>
+                              <Dropdown
+                                trigger={
+                                  <button className="dropdown-trigger">
+                                    <MoreVertical size={18} />
+                                  </button>
+                                }
+                                items={[
+                                  {
+                                    icon: <Edit size={16} />,
+                                    label: '编辑',
+                                    onClick: () => handleEditClick(meeting.meeting_id)
+                                  },
+                                  {
+                                    icon: <Trash2 size={16} />,
+                                    label: '删除',
+                                    onClick: () => handleDeleteClick(meeting),
+                                    danger: true
+                                  }
+                                ]}
+                                align="right"
+                              />
                             )}
                           </div>
                           <div className="meeting-meta">
diff --git a/src/components/MindMap.jsx b/src/components/MindMap.jsx
index 53a89ac..93d4c7a 100644
--- a/src/components/MindMap.jsx
+++ b/src/components/MindMap.jsx
@@ -14,8 +14,9 @@ import { Loader } from 'lucide-react';
  * @param {Object} props
  * @param {string} props.content - Markdown格式的内容（必须由父组件准备好）
  * @param {string} props.title - 标题（用于显示）
+ * @param {number} props.initialScale - 初始缩放倍数，默认为1.8
  */
-const MindMap = ({ content, title }) => {
+const MindMap = ({ content, title, initialScale = 1.8 }) => {
   const [markdown, setMarkdown] = useState('');
   const [loading, setLoading] = useState(true);
   const [error, setError] = useState('');
@@ -144,11 +145,6 @@ const MindMap = ({ content, title }) => {
 
     try {
       const processedMarkdown = preprocessMarkdownForMindMap(markdown, title);
-      // console.log('=== 思维导图数据调试 ===');
-      // console.log('原始markdown内容:');
-      // console.log(markdown);
-      // console.log('预处理后的markdown:');
-      // console.log(processedMarkdown);
 
       const transformer = new Transformer();
       const { root } = transformer.transform(processedMarkdown);
@@ -165,13 +161,9 @@ const MindMap = ({ content, title }) => {
       setTimeout(() => {
         if (markmapRef.current) {
           markmapRef.current.fit();
-          // 在fit之后，再放大1.8倍以获得更好的可读性
+          // 直接设置为指定的缩放倍数
           try {
-            const { state } = markmapRef.current;
-            if (state) {
-              const currentScale = state.transform.k;
-              markmapRef.current.rescale(currentScale * 1.8);
-            }
+            markmapRef.current.rescale(initialScale);
           } catch (e) {
             console.log('缩放调整失败:', e);
           }
@@ -183,7 +175,7 @@ const MindMap = ({ content, title }) => {
       setError('思维导图渲染失败');
     }
 
-  }, [markdown, loading, title]);
+  }, [markdown, loading, title, initialScale]);
 
   if (loading) {
     return (
diff --git a/src/components/SimpleSearchInput.css b/src/components/SimpleSearchInput.css
new file mode 100644
index 0000000..76747b0
--- /dev/null
+++ b/src/components/SimpleSearchInput.css
@@ -0,0 +1,64 @@
+/* 简洁搜索输入框样式 */
+.simple-search-input {
+  position: relative;
+  width: 100%;
+  display: flex;
+  align-items: center;
+}
+
+.simple-search-input-field {
+  width: 100%;
+  padding: 0.5rem 0.75rem;
+  padding-right: 2.5rem; /* 为清除按钮留出空间 */
+  border: 1px solid #e2e8f0;
+  border-radius: 6px;
+  font-size: 0.875rem;
+  transition: border-color 0.2s ease, box-shadow 0.2s ease;
+  outline: none;
+}
+
+.simple-search-input-field:focus {
+  border-color: #667eea;
+  box-shadow: 0 0 0 2px rgba(102, 126, 234, 0.1);
+}
+
+.simple-search-input-field::placeholder {
+  color: #94a3b8;
+}
+
+.simple-search-clear-btn {
+  position: absolute;
+  right: 0.5rem;
+  top: 50%;
+  transform: translateY(-50%);
+  padding: 0.25rem;
+  border: none;
+  background: transparent;
+  color: #94a3b8;
+  cursor: pointer;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  border-radius: 4px;
+  transition: all 0.2s ease;
+}
+
+.simple-search-clear-btn:hover {
+  background: #f1f5f9;
+  color: #475569;
+}
+
+.simple-search-clear-btn:active {
+  background: #e2e8f0;
+}
+
+/* 禁用状态 */
+.simple-search-input-field:disabled {
+  background: #f8fafc;
+  color: #94a3b8;
+  cursor: not-allowed;
+}
+
+.simple-search-input-field:disabled + .simple-search-clear-btn {
+  display: none;
+}
diff --git a/src/components/SimpleSearchInput.jsx b/src/components/SimpleSearchInput.jsx
new file mode 100644
index 0000000..90f46f9
--- /dev/null
+++ b/src/components/SimpleSearchInput.jsx
@@ -0,0 +1,90 @@
+import React, { useRef, useEffect, useState } from 'react';
+import { X } from 'lucide-react';
+import './SimpleSearchInput.css';
+
+const SimpleSearchInput = ({
+  value = '',
+  onChange,
+  placeholder = '搜索...',
+  className = '',
+  debounceDelay = 500,
+  realTimeSearch = true
+}) => {
+  const debounceTimerRef = useRef(null);
+  const [localValue, setLocalValue] = useState(value);
+
+  // 同步外部value的变化到本地状态
+  useEffect(() => {
+    setLocalValue(value);
+  }, [value]);
+
+  const handleInputChange = (e) => {
+    const inputValue = e.target.value;
+
+    // 立即更新本地状态，保证输入流畅
+    setLocalValue(inputValue);
+
+    // 通知父组件
+    if (onChange) {
+      if (realTimeSearch) {
+        // 使用防抖
+        if (debounceTimerRef.current) {
+          clearTimeout(debounceTimerRef.current);
+        }
+
+        debounceTimerRef.current = setTimeout(() => {
+          onChange(inputValue);
+        }, debounceDelay);
+      } else {
+        // 不使用防抖，立即触发
+        onChange(inputValue);
+      }
+    }
+  };
+
+  const handleClear = () => {
+    // 清除防抖定时器
+    if (debounceTimerRef.current) {
+      clearTimeout(debounceTimerRef.current);
+    }
+
+    // 立即更新本地状态和通知父组件
+    setLocalValue('');
+    if (onChange) {
+      onChange('');
+    }
+  };
+
+  // 组件卸载时清除定时器
+  useEffect(() => {
+    return () => {
+      if (debounceTimerRef.current) {
+        clearTimeout(debounceTimerRef.current);
+      }
+    };
+  }, []);
+
+  return (
+    <div className={`simple-search-input ${className}`}>
+      <input
+        type="text"
+        placeholder={placeholder}
+        value={localValue}
+        onChange={handleInputChange}
+        className="simple-search-input-field"
+      />
+      {localValue && (
+        <button
+          type="button"
+          className="simple-search-clear-btn"
+          onClick={handleClear}
+          aria-label="清除搜索"
+        >
+          <X size={16} />
+        </button>
+      )}
+    </div>
+  );
+};
+
+export default SimpleSearchInput;
diff --git a/src/pages/Dashboard.css b/src/pages/Dashboard.css
index bcb022b..c7c41d5 100644
--- a/src/pages/Dashboard.css
+++ b/src/pages/Dashboard.css
@@ -449,7 +449,6 @@
   background: white;
   border-radius: 16px;
   box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
-  overflow: hidden;
 }
 
 .section-header {
@@ -583,43 +582,6 @@
   background: #f1f5f9;
 }
 
-.dropdown-menu {
-  position: absolute;
-  top: 100%;
-  right: 0;
-  background: white;
-  border-radius: 8px;
-  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
-  border: 1px solid #e2e8f0;
-  padding: 0.5rem;
-  margin-top: 0.5rem;
-  width: 160px;
-  z-index: 10;
-  display: flex;
-  flex-direction: column;
-}
-
-.dropdown-menu button,
-.dropdown-menu a {
-  background: none;
-  border: none;
-  text-align: left;
-  padding: 0.75rem 1rem;
-  width: 100%;
-  border-radius: 6px;
-  cursor: pointer;
-  color: #334155;
-  text-decoration: none;
-  display: flex;
-  align-items: center;
-  gap: 0.75rem;
-}
-
-.dropdown-menu button:hover,
-.dropdown-menu a:hover {
-  background: #f1f5f9;
-}
-
 /* Modal Styles */
 .modal-overlay {
   position: fixed;
diff --git a/src/pages/Dashboard.jsx b/src/pages/Dashboard.jsx
index 21aa748..0a726ed 100644
--- a/src/pages/Dashboard.jsx
+++ b/src/pages/Dashboard.jsx
@@ -5,11 +5,12 @@ import { Link } from 'react-router-dom';
 import { buildApiUrl, API_ENDPOINTS } from '../config/api';
 import MeetingTimeline from '../components/MeetingTimeline';
 import TagCloud from '../components/TagCloud';
-import ExpandSearchBox from '../components/ExpandSearchBox';
+import SimpleSearchInput from '../components/SimpleSearchInput';
 import VoiceprintCollectionModal from '../components/VoiceprintCollectionModal';
 import ConfirmDialog from '../components/ConfirmDialog';
 import PageLoading from '../components/PageLoading';
 import ScrollToTop from '../components/ScrollToTop';
+import Dropdown from '../components/Dropdown';
 import meetingCacheService from '../services/meetingCacheService';
 import './Dashboard.css';
 
@@ -24,14 +25,12 @@ const Dashboard = ({ user, onLogout }) => {
   const [loading, setLoading] = useState(true);
   const [loadingMore, setLoadingMore] = useState(false);
   const [error, setError] = useState('');
-  const [dropdownOpen, setDropdownOpen] = useState(false);
   const [showChangePasswordModal, setShowChangePasswordModal] = useState(false);
   const [oldPassword, setOldPassword] = useState('');
   const [newPassword, setNewPassword] = useState('');
   const [confirmPassword, setConfirmPassword] = useState('');
   const [passwordChangeError, setPasswordChangeError] = useState('');
   const [passwordChangeSuccess, setPasswordChangeSuccess] = useState('');
-  const dropdownRef = useRef(null);
 
   // 声纹相关状态
   const [voiceprintStatus, setVoiceprintStatus] = useState(null);
@@ -206,18 +205,6 @@ const Dashboard = ({ user, onLogout }) => {
     setSearchQuery('');
   };
 
-  useEffect(() => {
-    const handleClickOutside = (event) => {
-      if (dropdownRef.current && !dropdownRef.current.contains(event.target)) {
-        setDropdownOpen(false);
-      }
-    };
-    document.addEventListener("mousedown", handleClickOutside);
-    return () => {
-      document.removeEventListener("mousedown", handleClickOutside);
-    };
-  }, [dropdownRef]);
-
   const fetchUserData = async () => {
     try {
       console.log('Fetching user data for user_id:', user.user_id);
@@ -359,22 +346,38 @@ const Dashboard = ({ user, onLogout }) => {
             <span className="logo-text">iMeeting</span>
           </div>
           <div className="user-actions">
-            <div className="user-menu-container" ref={dropdownRef}>
-              <div className="user-menu-trigger" onClick={() => setDropdownOpen(!dropdownOpen)}>
-                <span className="welcome-text">欢迎，{userInfo?.caption}</span>
-                <ChevronDown size={20} />
-              </div>
-              {dropdownOpen && (
-                <div className="dropdown-menu">
-                  <button onClick={() => { setShowChangePasswordModal(true); setDropdownOpen(false); }}><KeyRound size={16} /> 修改密码</button>
-                  <Link to="/prompt-management" onClick={() => setDropdownOpen(false)}><BookText size={16} /> 提示词仓库</Link>
-                  {user.role_id === 1 && (
-                    <Link to="/admin/management" onClick={() => setDropdownOpen(false)}><Shield size={16} /> 平台管理</Link>
-                  )}
-                  <button onClick={onLogout}><LogOut size={16} /> 退出登录</button>
+            <Dropdown
+              trigger={
+                <div className="user-menu-trigger">
+                  <span className="welcome-text">欢迎，{userInfo?.caption}</span>
+                  <ChevronDown size={20} />
                 </div>
-              )}
-            </div>
+              }
+              items={[
+                {
+                  icon: <KeyRound size={16} />,
+                  label: '修改密码',
+                  onClick: () => setShowChangePasswordModal(true)
+                },
+                {
+                  icon: <BookText size={16} />,
+                  label: '提示词仓库',
+                  onClick: () => window.location.href = '/prompt-management'
+                },
+                ...(user.role_id === 1 ? [{
+                  icon: <Shield size={16} />,
+                  label: '平台管理',
+                  onClick: () => window.location.href = '/admin/management'
+                }] : []),
+                {
+                  icon: <LogOut size={16} />,
+                  label: '退出登录',
+                  onClick: onLogout
+                }
+              ]}
+              align="right"
+              className="user-menu-dropdown"
+            />
           </div>
         </div>
       </header>
@@ -484,13 +487,12 @@ const Dashboard = ({ user, onLogout }) => {
           {/* 搜索和标签过滤卡片 */}
           <div className="filter-card-wrapper">
             <div className="filter-card-search">
-              <ExpandSearchBox
-                searchQuery={searchQuery}
-                onSearchChange={setSearchQuery}
+              <SimpleSearchInput
+                value={searchQuery}
+                onChange={setSearchQuery}
                 placeholder="搜索会议名称或发起人..."
-                collapsedText="会议搜索"
                 realTimeSearch={true}
-                showIcon={true}
+                debounceDelay={500}
               />
             </div>
 
diff --git a/src/pages/KnowledgeBasePage.jsx b/src/pages/KnowledgeBasePage.jsx
index f542987..874eff0 100644
--- a/src/pages/KnowledgeBasePage.jsx
+++ b/src/pages/KnowledgeBasePage.jsx
@@ -7,6 +7,7 @@ import ContentViewer from '../components/ContentViewer';
 import TagDisplay from '../components/TagDisplay';
 import Toast from '../components/Toast';
 import ConfirmDialog from '../components/ConfirmDialog';
+import SimpleSearchInput from '../components/SimpleSearchInput';
 import remarkGfm from 'remark-gfm';
 import rehypeRaw from 'rehype-raw';
 import rehypeSanitize from 'rehype-sanitize';
@@ -836,12 +837,12 @@ const KnowledgeBasePage = ({ user }) => {
                   <div className="form-group">
                     {/* 紧凑的搜索和过滤区 */}
                     <div className="search-filter-area">
-                      <input
-                        type="text"
-                        placeholder="搜索会议名称或创建人..."
+                      <SimpleSearchInput
                         value={searchQuery}
-                        onChange={(e) => setSearchQuery(e.target.value)}
-                        className="compact-search-input"
+                        onChange={setSearchQuery}
+                        placeholder="搜索会议名称或创建人..."
+                        realTimeSearch={true}
+                        debounceDelay={500}
                       />
 
                       {availableTags.length > 0 && (
diff --git a/src/pages/MeetingDetails.css b/src/pages/MeetingDetails.css
index 9ffa517..cef64a0 100644
--- a/src/pages/MeetingDetails.css
+++ b/src/pages/MeetingDetails.css
@@ -1526,8 +1526,8 @@
     font-size: 0.8rem;
     min-width: 80px;
   }
-  
-  .action-btn span {
+
+  .action-btn.icon-only span {
     display: none;
   }
   
diff --git a/src/pages/MeetingPreview.css b/src/pages/MeetingPreview.css
index 96fbb28..6abf560 100644
--- a/src/pages/MeetingPreview.css
+++ b/src/pages/MeetingPreview.css
@@ -150,6 +150,25 @@
   margin-bottom: 40px;
 }
 
+/* Tab 样式 */
+.preview-tabs {
+  margin-top: 20px;
+}
+
+.preview-tabs .ant-tabs-nav {
+  margin-bottom: 20px;
+}
+
+.preview-tabs .ant-tabs-tab {
+  font-size: 16px;
+  font-weight: 500;
+  padding: 12px 24px;
+}
+
+.preview-tabs .ant-tabs-tab-active {
+  font-weight: 600;
+}
+
 .summary-content {
   font-size: 15px;
   line-height: 1.8;
@@ -157,6 +176,48 @@
   overflow-wrap: break-word;
   word-wrap: break-word;
   word-break: break-word;
+  padding: 20px 0;
+}
+
+/* 思维导图容器样式 */
+.mindmap-wrapper {
+  width: 100%;
+  min-height: 500px;
+  height: 600px;
+  background: white;
+  border: 1px solid #e5e7eb;
+  border-radius: 8px;
+  overflow: hidden;
+  position: relative;
+}
+
+.mindmap-wrapper .mindmap-container {
+  width: 100%;
+  height: 100%;
+}
+
+.mindmap-wrapper .markmap-render-area {
+  width: 100%;
+  height: 100%;
+  background: white;
+}
+
+.mindmap-wrapper .mindmap-loading,
+.mindmap-wrapper .mindmap-error {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  height: 100%;
+  color: #64748b;
+}
+
+.mindmap-wrapper .mindmap-loading svg {
+  animation: spin 1s linear infinite;
+}
+
+.mindmap-wrapper .mindmap-error {
+  color: #dc2626;
 }
 
 /* Markdown 样式 */
@@ -333,8 +394,40 @@
     font-size: 14px;
   }
 
+  /* Tab 移动端优化 */
+  .preview-tabs .ant-tabs-nav {
+    margin-bottom: 15px;
+  }
+
+  .preview-tabs .ant-tabs-nav-list {
+    width: 100%;
+    display: flex;
+  }
+
+  .preview-tabs .ant-tabs-tab {
+    font-size: 15px;
+    padding: 12px 20px;
+    flex: 1;
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    margin: 0 !important;
+  }
+
+  .preview-tabs .ant-tabs-tab + .ant-tabs-tab {
+    margin: 0 !important;
+  }
+
+  /* 思维导图移动端优化 */
+  .mindmap-wrapper {
+    min-height: 400px;
+    height: 500px;
+    border-radius: 6px;
+  }
+
   .summary-content {
     font-size: 14px;
+    padding: 15px 0;
   }
 
   .summary-content h1 {
@@ -385,6 +478,11 @@
   .preview-title {
     font-size: 24px;
   }
+
+  /* 思维导图平板优化 */
+  .mindmap-wrapper {
+    height: 550px;
+  }
 }
 
 /* 打印样式优化 */
diff --git a/src/pages/MeetingPreview.jsx b/src/pages/MeetingPreview.jsx
index cdabe06..7d2349e 100644
--- a/src/pages/MeetingPreview.jsx
+++ b/src/pages/MeetingPreview.jsx
@@ -4,8 +4,12 @@ import ReactMarkdown from 'react-markdown';
 import remarkGfm from 'remark-gfm';
 import rehypeRaw from 'rehype-raw';
 import rehypeSanitize from 'rehype-sanitize';
+import { Tabs } from 'antd';
+import MindMap from '../components/MindMap';
 import './MeetingPreview.css';
 
+const { TabPane } = Tabs;
+
 const MeetingPreview = () => {
   const { meeting_id } = useParams();
   const [meetingData, setMeetingData] = useState(null);
@@ -20,8 +24,8 @@ const MeetingPreview = () => {
   const fetchMeetingPreviewData = async () => {
     try {
       setLoading(true);
-      const apiUrl = import.meta.env.VITE_API_URL || 'http://localhost:8000';
-      const response = await fetch(`${apiUrl}/api/meetings/${meeting_id}/preview-data`);
+      // Use relative path to work in both dev and production
+      const response = await fetch(`/api/meetings/${meeting_id}/preview-data`);
       const result = await response.json();
 
       if (result.code === "200") {
@@ -132,15 +136,28 @@ const MeetingPreview = () => {
         </div>
 
         <div className="summary-section">
-          <h2 className="section-title">📝 会议摘要</h2>
-          <div className="summary-content">
-            <ReactMarkdown
-              remarkPlugins={[remarkGfm]}
-              rehypePlugins={[rehypeRaw, rehypeSanitize]}
-            >
-              {meetingData.summary}
-            </ReactMarkdown>
-          </div>
+          <h2 className="section-title">📝 会议内容</h2>
+          <Tabs defaultActiveKey="summary" className="preview-tabs">
+            <TabPane tab="摘要" key="summary">
+              <div className="summary-content">
+                <ReactMarkdown
+                  remarkPlugins={[remarkGfm]}
+                  rehypePlugins={[rehypeRaw, rehypeSanitize]}
+                >
+                  {meetingData.summary}
+                </ReactMarkdown>
+              </div>
+            </TabPane>
+            <TabPane tab="脑图" key="mindmap">
+              <div className="mindmap-wrapper">
+                <MindMap
+                  content={meetingData.summary}
+                  title={meetingData.title}
+                  initialScale={1.8}
+                />
+              </div>
+            </TabPane>
+          </Tabs>
         </div>
 
         <div className="preview-footer">