diff --git a/backend/server.py b/backend/server.py
index 024a370..3704818 100644
--- a/backend/server.py
+++ b/backend/server.py
@@ -3049,11 +3049,9 @@ def ensure_export_dir(task_id: str) -> str:
 
 def generate_export_file_name(task_name: str, export_type: str) -> str:
     """生成导出文件名"""
-    from datetime import datetime
-    timestamp = datetime.now().strftime("%Y%m%d_%H%M%S")
     # 清理文件名中的非法字符
     safe_name = "".join(c for c in task_name if c.isalnum() or c in (' ', '-', '_')).strip()
-    return f"{safe_name}_{export_type}_{timestamp}"
+    return f"{safe_name}_{export_type}"
 
 
 @socketio.on('export')
@@ -3243,7 +3241,7 @@ def handle_get_export_list(data):
 
 # ==================== REST API 接口 ====================
 
-@app.route('/api/export/<int:record_id>/download', methods=['GET'])
+@app.route('/export/<int:record_id>/download', methods=['GET'])
 def download_export(record_id: int):
     """下载导出文件"""
     try:
@@ -3270,7 +3268,7 @@ def download_export(record_id: int):
         return jsonify({'error': str(e)}), 500
 
 
-@app.route('/api/export/<int:record_id>/preview', methods=['GET'])
+@app.route('/export/<int:record_id>/preview', methods=['GET'])
 def preview_export(record_id: int):
     """预览导出文件"""
     try:
@@ -3332,7 +3330,7 @@ def preview_export(record_id: int):
         return jsonify({'error': str(e)}), 500
 
 
-@app.route('/api/export/<int:record_id>/share', methods=['GET'])
+@app.route('/export/<int:record_id>/share', methods=['GET'])
 def share_export(record_id: int):
     """生成分享链接"""
     try:
@@ -3355,7 +3353,7 @@ def share_export(record_id: int):
         return jsonify({'error': str(e)}), 500
 
 
-@app.route('/api/export/<int:record_id>/share/info', methods=['GET'])
+@app.route('/export/<int:record_id>/share/info', methods=['GET'])
 def get_share_info(record_id: int):
     """获取分享文件信息（无需登录验证）"""
     try:
@@ -3407,7 +3405,7 @@ def get_shared_plan_page(share_token: str):
         return jsonify({'error': str(e)}), 500
 
 
-@app.route('/api/share/<share_token>/check', methods=['GET'])
+@app.route('/share/<share_token>/check', methods=['GET'])
 def check_share_code(share_token: str):
     """检查分享链接是否需要提取码"""
     try:
@@ -3431,7 +3429,7 @@ def check_share_code(share_token: str):
         return jsonify({'error': str(e)}), 500
 
 
-@app.route('/api/share/<share_token>', methods=['GET'])
+@app.route('/share/<share_token>', methods=['GET'])
 def get_shared_plan_info(share_token: str):
     """获取分享任务详情（API 接口，无需登录验证）"""
     # 获取URL参数中的提取码
@@ -3473,7 +3471,7 @@ def get_shared_plan_info(share_token: str):
         return jsonify({'error': str(e)}), 500
 
 
-@app.route('/api/share/import', methods=['POST'])
+@app.route('/share/import', methods=['POST'])
 def import_shared_plan():
     """导入分享的任务到自己的历史记录（HTTP API，无需 WebSocket）"""
     try:
@@ -3537,7 +3535,7 @@ def import_shared_plan():
         return jsonify({'error': str(e)}), 500
 
 
-@app.route('/api/export/<int:record_id>', methods=['DELETE'])
+@app.route('/export/<int:record_id>', methods=['DELETE'])
 def delete_export(record_id: int):
     """删除导出记录"""
     try:
diff --git a/frontend/src/api/index.ts b/frontend/src/api/index.ts
index 0331c00..acdd124 100644
--- a/frontend/src/api/index.ts
+++ b/frontend/src/api/index.ts
@@ -923,41 +923,8 @@ class Api {
   downloadExport = async (recordId: number): Promise<void> => {
     const configStore = useConfigStoreHook()
     const baseURL = configStore.config.apiBaseUrl || ''
-    const url = `${baseURL}/api/export/${recordId}/download`
-
-    try {
-      const response = await fetch(url, {
-        method: 'GET',
-      })
-
-      if (!response.ok) {
-        throw new Error('下载失败')
-      }
-
-      // 获取文件名从 Content-Disposition 头
-      const contentDisposition = response.headers.get('Content-Disposition')
-      let fileName = 'download'
-      if (contentDisposition) {
-        const match = contentDisposition.match(/filename[^;=\n]*=((['"]).*?\2|[^;\n]*)/)
-        if (match) {
-          fileName = match[1].replace(/['"]/g, '')
-        }
-      }
-
-      // 创建 Blob 并下载
-      const blob = await response.blob()
-      const downloadUrl = window.URL.createObjectURL(blob)
-      const link = document.createElement('a')
-      link.href = downloadUrl
-      link.download = fileName
-      document.body.appendChild(link)
-      link.click()
-      document.body.removeChild(link)
-      window.URL.revokeObjectURL(downloadUrl)
-    } catch (error) {
-      console.error('下载失败:', error)
-      throw error
-    }
+    // 直接使用 window.location.href 跳转下载，浏览器会自动处理文件名
+    window.location.href = `${baseURL}/export/${recordId}/download`
   }
 
   /**
@@ -971,7 +938,7 @@ class Api {
   }> => {
     const configStore = useConfigStoreHook()
     const baseURL = configStore.config.apiBaseUrl || ''
-    const url = `${baseURL}/api/export/${recordId}/preview`
+    const url = `${baseURL}/export/${recordId}/preview`
 
     const response = await request<{
       content?: string
@@ -996,7 +963,7 @@ class Api {
   }> => {
     const configStore = useConfigStoreHook()
     const baseURL = configStore.config.apiBaseUrl || ''
-    const url = `${baseURL}/api/export/${recordId}/share`
+    const url = `${baseURL}/export/${recordId}/share`
 
     const response = await request<{
       share_url: string
@@ -1012,7 +979,7 @@ class Api {
   deleteExport = async (recordId: number): Promise<boolean> => {
     const configStore = useConfigStoreHook()
     const baseURL = configStore.config.apiBaseUrl || ''
-    const url = `${baseURL}/api/export/${recordId}`
+    const url = `${baseURL}/export/${recordId}`
 
     try {
       await request({
diff --git a/frontend/src/layout/components/Main/Task.vue b/frontend/src/layout/components/Main/Task.vue
index 5a06500..937c322 100644
--- a/frontend/src/layout/components/Main/Task.vue
+++ b/frontend/src/layout/components/Main/Task.vue
@@ -244,7 +244,12 @@ async function handleSearch() {
     currentGenerationId.value = response.generation_id || ''
     // 从 response.data 中获取 task_id（REST API 格式）
     currentTaskID.value = response.data?.task_id || response.task_id || ''
-    console.log('📋 直接格式: generation_id:', currentGenerationId.value, 'TaskID:', currentTaskID.value)
+    console.log(
+      '📋 直接格式: generation_id:',
+      currentGenerationId.value,
+      'TaskID:',
+      currentTaskID.value
+    )
   } else {
     outlineData = response
     currentGenerationId.value = ''
@@ -602,7 +607,7 @@ defineExpose({
           />
         </el-button>
       </div>
-      <AssignmentButton v-if="planReady" @click="openAgentAllocationDialog" />
+      <!-- <AssignmentButton v-if="planReady" @click="openAgentAllocationDialog" /> -->
       <!-- 设置按钮 -->
       <el-button class="setting-button" circle title="设置" @click="openSettingsPanel">
         <el-icon size="18px"><Setting /></el-icon>
diff --git a/frontend/src/layout/components/Main/TaskTemplate/AgentRepo/AgentRepoList.vue b/frontend/src/layout/components/Main/TaskTemplate/AgentRepo/AgentRepoList.vue
index 2aa9e84..5b360b5 100644
--- a/frontend/src/layout/components/Main/TaskTemplate/AgentRepo/AgentRepoList.vue
+++ b/frontend/src/layout/components/Main/TaskTemplate/AgentRepo/AgentRepoList.vue
@@ -124,7 +124,9 @@ const agentsStore = useAgentsStore()
           <!-- 数据空间 -->
           <div class="text-[12px]">
             <span class="text-[var(--color-text)] font-bold">数据空间</span>
-            <div class="text-[var(--color-text-secondary)] mt-1">归属于{{ item.Classification }}数据空间</div>
+            <div class="text-[var(--color-text-secondary)] mt-1">
+              归属于{{ item.Classification }}数据空间
+            </div>
           </div>
           <!-- 分割线 -->
           <div class="h-[1px] w-full bg-[var(--color-border-default)] my-[8px]"></div>
@@ -158,8 +160,6 @@ const agentsStore = useAgentsStore()
               v-if="index1 !== taskProcess.filter(i => i.AgentName === item.Name).length - 1"
               class="h-[1px] w-full bg-[var(--color-border-default)] my-[8px]"
             ></div>
-
-            <AssignmentButton />
           </div>
         </template>
       </div>
diff --git a/frontend/src/layout/components/Main/TaskTemplate/ExportList/index.vue b/frontend/src/layout/components/Main/TaskTemplate/ExportList/index.vue
index 9c27523..3235e0e 100644
--- a/frontend/src/layout/components/Main/TaskTemplate/ExportList/index.vue
+++ b/frontend/src/layout/components/Main/TaskTemplate/ExportList/index.vue
@@ -80,8 +80,18 @@
       :title="previewData?.file_name || '文件预览'"
       width="80%"
       :close-on-click-modal="true"
+      :show-close="false"
       class="preview-dialog"
     >
+      <!-- 自定义关闭按钮 -->
+      <template #header>
+        <div class="dialog-header">
+          <span class="dialog-title">{{ previewData?.file_name || '文件预览' }}</span>
+          <button class="dialog-close-btn" @click="previewVisible = false">
+            <SvgIcon icon-class="close" size="18px" />
+          </button>
+        </div>
+      </template>
       <div class="preview-content">
         <div v-if="previewLoading" class="preview-loading">
           <el-icon class="is-loading"><Loading /></el-icon>
@@ -1079,8 +1089,44 @@ onMounted(() => {
 
 // 预览弹窗样式
 .preview-dialog {
+  .el-dialog__header {
+    padding: 16px 20px 10px;
+    margin: 0;
+  }
+
   .el-dialog__body {
     padding: 16px;
   }
+
+  .dialog-header {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    width: 100%;
+  }
+
+  .dialog-title {
+    font-size: 16px;
+    font-weight: 600;
+    color: var(--color-text-primary);
+  }
+
+  .dialog-close-btn {
+    background: none;
+    border: none;
+    cursor: pointer;
+    width: 24px;
+    height: 24px;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    border-radius: 4px;
+    color: var(--color-text-regular);
+    transition: transform 0.3s ease;
+
+    &:hover {
+      transform: rotate(180deg);
+    }
+  }
 }
 </style>
diff --git a/frontend/src/layout/components/Main/TaskTemplate/TaskProcess/ProcessCard.vue b/frontend/src/layout/components/Main/TaskTemplate/TaskProcess/ProcessCard.vue
index 0f24c9b..cd23417 100644
--- a/frontend/src/layout/components/Main/TaskTemplate/TaskProcess/ProcessCard.vue
+++ b/frontend/src/layout/components/Main/TaskTemplate/TaskProcess/ProcessCard.vue
@@ -201,7 +201,7 @@ function handleCancel() {
       </div>
     </div>
     <!-- 按钮点击不会冒泡到卡片 -->
-    <BranchButton :step="step" />
+    <!-- <BranchButton :step="step" /> -->
   </div>
 </template>
 
diff --git a/frontend/src/layout/components/Main/TaskTemplate/TaskSyllabus/index.vue b/frontend/src/layout/components/Main/TaskTemplate/TaskSyllabus/index.vue
index 77bbb9b..8316f94 100644
--- a/frontend/src/layout/components/Main/TaskTemplate/TaskSyllabus/index.vue
+++ b/frontend/src/layout/components/Main/TaskTemplate/TaskSyllabus/index.vue
@@ -366,7 +366,7 @@ defineExpose({
         </div>
       </div>
     </div>
-    <BranchButton v-if="planReady" @click="openPlanModification" />
+    <!-- <BranchButton v-if="planReady" @click="openPlanModification" /> -->
   </div>
 </template>
 <style lang="scss" scoped>
diff --git a/frontend/src/views/Share.vue b/frontend/src/views/Share.vue
index a00c227..a8b985e 100644
--- a/frontend/src/views/Share.vue
+++ b/frontend/src/views/Share.vue
@@ -263,7 +263,7 @@ const downloadFile = async () => {
       return
     }
 
-    window.location.href = `${apiBaseUrl}/api/export/${parsed.recordId}/download`
+    window.location.href = `${apiBaseUrl}/export/${parsed.recordId}/download`
   } catch (e) {
     console.error('下载失败:', e)
     ElMessage.error('下载失败')