diff --git a/src/components/RichTextEditor.vue b/src/components/RichTextEditor.vue
index e5ba150..5402802 100644
--- a/src/components/RichTextEditor.vue
+++ b/src/components/RichTextEditor.vue
@@ -64,13 +64,13 @@ const eventManager = {
       const deleteHandler = function (e) {
         e.stopPropagation()
         e.preventDefault()
-        
+
         // 检查删除按钮是否可见，只有在可见状态下才能触发删除
         if (deleteBtn.classList.contains('visible')) {
           // 检查是否是刚显示的按钮点击（通过时间戳判断）
           const lastVisibleTime = deleteBtn._lastVisibleTime || 0
           const currentTime = Date.now()
-          
+
           // 如果距离上次显示时间超过300ms，才执行删除操作
           if (currentTime - lastVisibleTime > 300) {
             container.remove()
@@ -86,7 +86,7 @@ const eventManager = {
     // 为图片容器添加短按事件以显示/隐藏删除按钮
     let touchStartTime = 0
     let isDeleteButtonClicked = false
-    
+
     // 标记删除按钮被点击
     const markDeleteButtonClicked = function () {
       isDeleteButtonClicked = true
@@ -95,7 +95,7 @@ const eventManager = {
         isDeleteButtonClicked = false
       }, 300)
     }
-    
+
     // 如果删除按钮存在，为其添加标记事件
     if (deleteBtn) {
       deleteBtn._markClickHandler = markDeleteButtonClicked
@@ -106,27 +106,27 @@ const eventManager = {
       touchStartTime = Date.now()
     }
 
-    const touchEndHandler = function (e) {
-      const touchDuration = Date.now() - touchStartTime
-      // 短按（小于200ms）且非长按拖拽状态且不是删除按钮点击时切换删除按钮显示
-      if (touchDuration < 200 && !dragState.value.isLongPress && !isDeleteButtonClicked) {
-        e.stopPropagation()
-        // 切换删除按钮的显示状态
-        if (deleteBtn) {
-          const isCurrentlyVisible = deleteBtn.classList.contains('visible')
-          if (isCurrentlyVisible) {
-            deleteBtn.classList.remove('visible')
-          } else {
-            deleteBtn.classList.add('visible')
-            // 记录显示时间
-            deleteBtn._lastVisibleTime = Date.now()
-          }
-        }
-      }
-      // 重置删除按钮点击标记
-      setTimeout(() => {
-        isDeleteButtonClicked = false
-      }, 50)
+    const touchEndHandler = function (e) {
+      const touchDuration = Date.now() - touchStartTime
+      // 短按（小于200ms）且非长按拖拽状态且不是删除按钮点击时切换删除按钮显示
+      if (touchDuration < 200 && !dragState.value.isLongPress && !isDeleteButtonClicked) {
+        e.stopPropagation()
+        // 切换删除按钮的显示状态
+        if (deleteBtn) {
+          const isCurrentlyVisible = deleteBtn.classList.contains('visible')
+          if (isCurrentlyVisible) {
+            deleteBtn.classList.remove('visible')
+          } else {
+            deleteBtn.classList.add('visible')
+            // 记录显示时间
+            deleteBtn._lastVisibleTime = Date.now()
+          }
+        }
+      }
+      // 重置删除按钮点击标记
+      setTimeout(() => {
+        isDeleteButtonClicked = false
+      }, 50)
     }
 
     container.addEventListener('touchstart', touchStartHandler)
@@ -160,7 +160,7 @@ const eventManager = {
       container.removeEventListener('touchend', touchEndHandler)
       delete container._touchEndHandler
     }
-    
+
     if (markDeleteButtonClicked) {
       delete container._markDeleteButtonClicked
     }
@@ -172,7 +172,7 @@ const eventManager = {
         deleteBtn.removeEventListener('click', deleteBtn._deleteHandler)
         delete deleteBtn._deleteHandler
       }
-      
+
       if (deleteBtn._markClickHandler) {
         deleteBtn.removeEventListener('touchstart', deleteBtn._markClickHandler)
         delete deleteBtn._markClickHandler
@@ -444,11 +444,9 @@ const insertQuote = () => {
     const quoteContainer = document.createElement('div')
     quoteContainer.className = 'quote-container'
 
-    // 创建图标元素
-    const icon = document.createElement('img')
+    // 创建图标元素（使用CSS背景而非img标签）
+    const icon = document.createElement('div')
     icon.className = 'quote-icon'
-    icon.src = '/assets/icons/drawable-xxhdpi/rag_quote.png'
-    icon.alt = '引用'
 
     // 创建内容容器
     const contentSpan = document.createElement('div')
@@ -507,11 +505,9 @@ const createTodoItem = (text = '') => {
   todoContainer.contentEditable = false // 容器本身不可编辑
   todoContainer.className = 'todo-container'
 
-  // 创建图标元素（复选框）
-  const icon = document.createElement('img')
+  // 创建图标元素（复选框，使用CSS背景而非img标签）
+  const icon = document.createElement('div')
   icon.className = 'todo-icon'
-  icon.src = '/assets/icons/drawable-xxhdpi/rtf_icon_gtasks.png' // 未完成状态图标
-  icon.alt = '待办事项'
 
   // 创建内容容器（可编辑区域）
   const contentSpan = document.createElement('div')
@@ -531,16 +527,16 @@ const addTodoEventListeners = (icon, contentSpan, todoContainer) => {
   // 添加事件监听器到图标，实现待办事项完成状态切换
   icon.addEventListener('click', function () {
     // 根据当前状态切换图标和样式
-    if (this.src.includes('rtf_icon_gtasks.png')) {
-      // 切换到完成状态
-      this.src = '/assets/icons/drawable-xxhdpi/rtf_icon_gtasks_light.png' // 完成状态图标
-      contentSpan.style.color = 'var(--text-tertiary)' // 灰色文字
-      contentSpan.style.textDecoration = 'line-through' // 添加删除线
-    } else {
+    if (this.classList.contains('completed')) {
       // 切换到未完成状态
-      this.src = '/assets/icons/drawable-xxhdpi/rtf_icon_gtasks.png' // 未完成状态图标
+      this.classList.remove('completed')
       contentSpan.style.color = 'var(--note-content)' // 正常文字颜色
       contentSpan.style.textDecoration = 'none' // 移除删除线
+    } else {
+      // 切换到完成状态
+      this.classList.add('completed')
+      contentSpan.style.color = 'var(--text-tertiary)' // 灰色文字
+      contentSpan.style.textDecoration = 'line-through' // 添加删除线
     }
     handleInput() // 触发内容更新
   })
@@ -1695,7 +1691,7 @@ defineExpose({
 
 /* 优化段落样式，确保与基准线对齐 */
 :deep(.editor-content p) {
-  margin: 0 0 0.75rem 0;
+  margin: 0;
   line-height: var(--editor-line-height, 1.6);
   letter-spacing: 0.3px;
 }
@@ -1704,7 +1700,7 @@ defineExpose({
 :deep(.editor-content h2) {
   font-size: var(--editor-font-size, 1rem);
   font-weight: 600;
-  margin: 0 0 0.75rem 0;
+  margin: 0;
   color: var(--note-title);
   line-height: var(--editor-line-height, 1.6);
   letter-spacing: 0.3px;
@@ -1715,7 +1711,7 @@ defineExpose({
 :deep(.editor-content blockquote) {
   border-left: 3px solid var(--primary);
   padding: 0 1rem 0 1rem;
-  margin: 0 0 0.75rem 0;
+  margin: 0;
   color: var(--text-secondary);
   background-color: var(--background-secondary);
   font-style: italic;
@@ -1724,7 +1720,7 @@ defineExpose({
 
 :deep(.quote-container) {
   position: relative;
-  margin: 0 0 0.75rem 0;
+  margin: 0;
   line-height: var(--editor-line-height, 1.6);
 }
 
@@ -1735,11 +1731,15 @@ defineExpose({
   width: var(--editor-font-size, 1rem);
   height: var(--editor-font-size, 1rem);
   margin-top: 0.1875rem;
+  background-image: url('/assets/icons/drawable-xxhdpi/rag_quote.png');
+  background-size: contain;
+  background-repeat: no-repeat;
+  background-position: center;
 }
 
 :deep(.quote-content) {
   border-left: 3px solid var(--primary);
-  padding: 0 var(--editor-font-size, 1rem) 0 2rem;
+  padding: 0 var(--editor-font-size, 1rem) 0 1rem;
   margin-left: var(--editor-font-size, 1rem);
   color: var(--text-secondary);
   background-color: var(--background-secondary);
@@ -1749,7 +1749,7 @@ defineExpose({
 
 :deep(.editor-content ul),
 :deep(.editor-content ol) {
-  margin: 0 0 0.75rem 0;
+  margin: 0;
   padding-left: 2rem;
   position: relative;
   line-height: var(--editor-line-height, 1.6);
@@ -1878,6 +1878,14 @@ defineExpose({
   top: 50%;
   left: 0;
   transform: translateY(-50%);
+  background-image: url('/assets/icons/drawable-xxhdpi/rtf_icon_gtasks.png');
+  background-size: contain;
+  background-repeat: no-repeat;
+  background-position: center;
+}
+
+:deep(.todo-icon.completed) {
+  background-image: url('/assets/icons/drawable-xxhdpi/rtf_icon_gtasks_light.png');
 }
 
 :deep(.todo-content) {
diff --git a/src/stores/useAppStore.js b/src/stores/useAppStore.js
index b49fc7d..d92427b 100644
--- a/src/stores/useAppStore.js
+++ b/src/stores/useAppStore.js
@@ -81,92 +81,22 @@ export const useAppStore = defineStore('app', {
     async loadMockData() {
       // Mock notes - 使用固定的日期值以避免每次运行时变化
       const fixedCurrentDate = '2025-10-12T10:00:00.000Z';
-      const fixedYesterday = '2025-10-11T10:00:00.000Z';
-      const fixedTwoDaysAgo = '2025-10-10T10:00:00.000Z';
-      const fixedThreeDaysAgo = '2025-10-09T10:00:00.000Z';
-      const fixedFourDaysAgo = '2025-10-08T10:00:00.000Z';
-      const fixedFiveDaysAgo = '2025-10-07T10:00:00.000Z';
 
-      // 预设的便签示例数据
+      // 预设的便签示例数据 - 仅保留一条关于应用功能介绍和示例的便签
       const mockNotes = [
         {
           id: '1',
           title: '欢迎使用锤子便签',
-          content: '这是一个功能强大的便签应用，您可以在这里记录您的想法、待办事项等。',
+          content: '<p>这是一个功能强大的便签应用，您可以在这里记录您的想法、待办事项等。</p><br><h2>功能介绍</h2><p>1. 创建和编辑便签<br>2. 为便签加星和置顶<br>3. 将便签分类到文件夹<br>4. 搜索便签内容<br>5. 回收站功能</p><br><h2>编辑器功能演示</h2><br><h2>标题格式</h2><p>点击标题按钮可创建居中的标题</p><br><h2>待办事项</h2><div class="todo-container"><div class="todo-icon"></div><div contenteditable="true" class="todo-content">这是一个待办事项</div></div><div class="todo-container"><div class="todo-icon completed"></div><div contenteditable="true" class="todo-content" style="color: var(--text-tertiary); text-decoration: line-through;">这是一个已完成的待办事项</div></div><br><h2>列表格式</h2><ul><li>无序列表项1</li><li>无序列表项2</li></ul><br><h2>文本格式</h2><p><strong>加粗文本</strong></p><br><h2>引用格式</h2><div class="quote-container"><div class="quote-icon"></div><div class="quote-content">这是一段引用文本<br>可以用来引用他人的话语</div></div><br><h2>图片</h2><p>点击图片按钮可以插入图片，长按图片可以拖拽排序</p>',
           createdAt: fixedCurrentDate,
           updatedAt: fixedCurrentDate,
           folderId: null,
           isStarred: true,      // 加星便签
           isTop: true,          // 置顶便签
-          hasImage: false,      // 不包含图片
-          isDeleted: false,     // 未删除
-          deletedAt: null,
-        },
-        {
-          id: '2',
-          title: '待办事项',
-          content: '1. 完成项目报告\n2. 购买 groceries\n3. 预约医生\n4. 给朋友打电话',
-          createdAt: fixedYesterday,
-          updatedAt: fixedYesterday,
-          folderId: null,
-          isStarred: true,      // 加星便签
-          isTop: false,         // 非置顶
           hasImage: true,       // 包含图片
           isDeleted: false,     // 未删除
           deletedAt: null,
-        },
-        {
-          id: '3',
-          title: '购物清单',
-          content: '苹果\n牛奶\n面包\n鸡蛋\n西红柿\n咖啡',
-          createdAt: fixedTwoDaysAgo,
-          updatedAt: fixedTwoDaysAgo,
-          folderId: null,
-          isStarred: false,     // 非加星
-          isTop: false,         // 非置顶
-          hasImage: false,      // 不包含图片
-          isDeleted: false,     // 未删除
-          deletedAt: null,
-        },
-        {
-          id: '4',
-          title: '项目想法',
-          content: '1. 实现云同步功能\n2. 添加深色模式\n3. 支持Markdown语法\n4. 添加标签功能',
-          createdAt: fixedThreeDaysAgo,
-          updatedAt: fixedThreeDaysAgo,
-          folderId: null,
-          isStarred: false,     // 非加星
-          isTop: false,         // 非置顶
-          hasImage: false,      // 不包含图片
-          isDeleted: false,     // 未删除
-          deletedAt: null,
-        },
-        {
-          id: '5',
-          title: '读书笔记',
-          content: '《Vue.js实战》\n- 组件化思想是Vue的核心\n- 理解响应式原理很重要\n- Pinia是Vue 3的推荐状态管理库',
-          createdAt: fixedFourDaysAgo,
-          updatedAt: fixedFourDaysAgo,
-          folderId: null,
-          isStarred: false,     // 非加星
-          isTop: false,         // 非置顶
-          hasImage: false,      // 不包含图片
-          isDeleted: false,     // 未删除
-          deletedAt: null,
-        },
-        {
-          id: '6',
-          title: '已删除的便签',
-          content: '这是一条已删除的便签示例，应该只在回收站中显示。',
-          createdAt: fixedFiveDaysAgo,
-          updatedAt: fixedFiveDaysAgo,
-          folderId: null,
-          isStarred: false,     // 非加星
-          isTop: false,         // 非置顶
-          hasImage: false,      // 不包含图片
-          isDeleted: true,      // 已删除
-          deletedAt: fixedYesterday,
-        },
+        }
       ]
 
       // Mock folders - 使用固定的日期值