diff --git a/apps/admin/src/components/AiChat/DynamicChart.tsx b/apps/admin/src/components/AiChat/DynamicChart.tsx
index 58ea6d7..06e0d0d 100644
--- a/apps/admin/src/components/AiChat/DynamicChart.tsx
+++ b/apps/admin/src/components/AiChat/DynamicChart.tsx
@@ -1,4 +1,5 @@
 import React, { lazy, Suspense, useEffect, useMemo, useState } from 'react';
+import { saveAs } from 'file-saver';
 import { XCard, registerCatalog, type XAgentCommand_v0_9 } from '@ant-design/x-card';
 import { Button, Spin, Tag, Tooltip, Typography } from 'antd';
 import { DownloadOutlined } from '@ant-design/icons';
@@ -232,12 +233,7 @@ const ChartPreview: React.FC<ChartPreviewProps> = ({ chart }) => {
       pixelRatio: 2,
       backgroundColor: '#fff',
     });
-    const link = document.createElement('a');
-    link.href = url;
-    link.download = `${chart.title || '图表'}.png`;
-    document.body.appendChild(link);
-    link.click();
-    link.remove();
+    saveAs(url, `${chart.title || '图表'}.png`);
   };
 
   return (
diff --git a/apps/admin/src/components/ImportWizard/ImportWizardModal.tsx b/apps/admin/src/components/ImportWizard/ImportWizardModal.tsx
index eb6b2e3..0515bf7 100644
--- a/apps/admin/src/components/ImportWizard/ImportWizardModal.tsx
+++ b/apps/admin/src/components/ImportWizard/ImportWizardModal.tsx
@@ -35,6 +35,7 @@ import {
   importErrorReportUrl,
   previewImportStep,
 } from '../../api/imports';
+import { saveAs } from 'file-saver';
 import {
   STEP_FIELDS,
   type ImportPreviewResult,
@@ -101,12 +102,7 @@ async function downloadErrorReport(runId: string, stepKey?: ImportStepKey): Prom
   });
   if (!response.ok) throw new Error('错误报告下载失败');
   const blob = await response.blob();
-  const url = URL.createObjectURL(blob);
-  const anchor = document.createElement('a');
-  anchor.href = url;
-  anchor.download = `导入错误报告-${runId.slice(0, 8)}.csv`;
-  anchor.click();
-  window.setTimeout(() => URL.revokeObjectURL(url), 60_000);
+  saveAs(blob, `导入错误报告-${runId.slice(0, 8)}.csv`);
 }
 
 export const ImportWizardModal: React.FC<ImportWizardModalProps> = ({
diff --git a/apps/admin/src/hooks/useDirtyGuard.ts b/apps/admin/src/hooks/useDirtyGuard.ts
index 2222aae..bd22989 100644
--- a/apps/admin/src/hooks/useDirtyGuard.ts
+++ b/apps/admin/src/hooks/useDirtyGuard.ts
@@ -1,6 +1,7 @@
 import { useCallback, useRef } from 'react';
 import { App } from 'antd';
 import type { FormInstance } from 'antd';
+import equal from 'fast-deep-equal';
 
 /**
  * 弹窗「未保存内容」保护：关闭弹窗时若表单值已被修改，先确认再关闭，
@@ -15,16 +16,16 @@ import type { FormInstance } from 'antd';
  */
 export function useDirtyGuard(form: FormInstance) {
   const { modal } = App.useApp();
-  const pristineRef = useRef<string>('');
+  const pristineRef = useRef<unknown>(null);
 
   /** 记录当前表单值为「未修改」基准；打开弹窗/回填后调用 */
   const snapshot = useCallback(() => {
-    pristineRef.current = JSON.stringify(form.getFieldsValue());
+    pristineRef.current = form.getFieldsValue();
   }, [form]);
 
   /** 表单是否有未保存修改（与 snapshot 时对比） */
   const isDirty = useCallback(() => {
-    return JSON.stringify(form.getFieldsValue()) !== pristineRef.current;
+    return !equal(form.getFieldsValue(), pristineRef.current);
   }, [form]);
 
   const confirmClose = useCallback(
diff --git a/apps/admin/src/pages/Attendance/admin.tsx b/apps/admin/src/pages/Attendance/admin.tsx
index f0895b3..67fbf47 100644
--- a/apps/admin/src/pages/Attendance/admin.tsx
+++ b/apps/admin/src/pages/Attendance/admin.tsx
@@ -39,6 +39,7 @@ import {
   type DingTalkSyncStatus,
   type HistoryScheduleOption,
 } from './AttendanceAdmin.helpers';
+import { saveAs } from 'file-saver';
 
 export const AdminAttendanceArchive: React.FC<{ canEdit: boolean }> = ({ canEdit }) => {
   const { modal } = App.useApp();
@@ -349,14 +350,7 @@ export const AdminAttendanceArchive: React.FC<{ canEdit: boolean }> = ({ canEdit
         if (!response.ok) throw new Error('导出失败');
         return response.blob();
       })
-      .then((blob) => {
-        const url = URL.createObjectURL(blob);
-        const anchor = document.createElement('a');
-        anchor.href = url;
-        anchor.download = `学生考勤-${dayjs().format('YYYYMMDD')}.xlsx`;
-        anchor.click();
-        URL.revokeObjectURL(url);
-      })
+      .then((blob) => saveAs(blob, `学生考勤-${dayjs().format('YYYYMMDD')}.xlsx`))
       .catch(() => message.error('导出失败'));
   }, [buildParams]);
 
diff --git a/apps/admin/src/pages/Classes/ClassDetailTabs.tsx b/apps/admin/src/pages/Classes/ClassDetailTabs.tsx
index 5e38327..74d77b4 100644
--- a/apps/admin/src/pages/Classes/ClassDetailTabs.tsx
+++ b/apps/admin/src/pages/Classes/ClassDetailTabs.tsx
@@ -26,6 +26,7 @@ import { QueryEmpty } from '../../components/QueryState';
 import { useSubmitShortcut } from '../../hooks/useSubmitShortcut';
 import { message } from '../../ui/app-message';
 import { buildTeacherCandidateOptions, type TeacherCandidateUser } from './teacher-candidate';
+import { saveAs } from 'file-saver';
 
 export interface ClassStudent {
   id: number;
@@ -312,12 +313,7 @@ export const ClassStudentsTab: React.FC<{
             });
             if (!res.ok) throw new Error('导出失败');
             const blob = await res.blob();
-            const url = URL.createObjectURL(blob);
-            const a = document.createElement('a');
-            a.href = url;
-            a.download = `班级花名册-${detail?.name || id}.xlsx`;
-            a.click();
-            URL.revokeObjectURL(url);
+            saveAs(blob, `班级花名册-${detail?.name || id}.xlsx`);
             message.success('花名册导出成功');
           } catch (error) {
             console.error('花名册导出失败', error);
diff --git a/apps/admin/src/pages/Classrooms/index.tsx b/apps/admin/src/pages/Classrooms/index.tsx
index 1059860..e6bfe48 100644
--- a/apps/admin/src/pages/Classrooms/index.tsx
+++ b/apps/admin/src/pages/Classrooms/index.tsx
@@ -36,6 +36,7 @@ import { usePermission } from '../../hooks/usePermission';
 import { useUserStore } from '../../store/user/userStore';
 import { useVisibleRefetch } from '../../hooks/usePageVisible';
 import { useDirtyGuard } from '../../hooks/useDirtyGuard';
+import { saveAs } from 'file-saver';
 
 const statusMap: Record<string, { text: string; color: string }> = {
   available: { text: '可用', color: 'green' },
@@ -221,14 +222,7 @@ const ClassroomsPage: React.FC = () => {
     const token = useUserStore.getState().token;
     fetch(`${baseURL}/classrooms/template`, { headers: { Authorization: `Bearer ${token}` } })
       .then((res) => res.blob())
-      .then((blob) => {
-        const url = URL.createObjectURL(blob);
-        const a = document.createElement('a');
-        a.href = url;
-        a.download = '教室导入模板.xlsx';
-        a.click();
-        URL.revokeObjectURL(url);
-      })
+      .then((blob) => saveAs(blob, '教室导入模板.xlsx'))
       .catch(() => message.error('下载失败'));
   };
 
@@ -486,12 +480,8 @@ const ClassroomsPage: React.FC = () => {
                 headers: { Authorization: `Bearer ${token}` },
               })
                 .then((r) => r.blob())
-                .then((b) => {
-                  const a = document.createElement('a');
-                  a.href = URL.createObjectURL(b);
-                  a.download = '教室使用报表.xlsx';
-                  a.click();
-                });
+                .then((b) => saveAs(b, '教室使用报表.xlsx'))
+                .catch(() => message.error('导出失败'));
             }}
           >
             导出报表