commit remaining frontend updates

public/js/import-export.js

@@ -11,7 +11,7 @@ async function doExport(format) {
   closeExportModal();
   showToast('正在导出...');
   try {
-    const res = await fetch(API + '/api/export?format=' + format, { headers: headers() });
+    const res = await apiFetch(API + '/api/export?format=' + format);
     if (!res.ok) {
       const err = await res.json();
       showToast(err.error || '导出失败');
@@ -88,9 +88,9 @@ async function confirmImport() {
   if (!pendingImportContent) return;
   showToast('正在导入...');
   try {
-    const res = await fetch(API + '/api/import', {
+    const res = await apiFetch(API + '/api/import', {
       method: 'POST',
-      headers: { 'Content-Type': 'text/plain; charset=utf-8', 'Authorization': 'Bearer ' + token },
+      headers: { 'Content-Type': 'text/plain; charset=utf-8' },
       body: pendingImportContent
     });
     const data = await res.json();