Handle clipboard copy failures in auth files page

src/pages/AuthFilesPage.tsx

@@ -170,6 +170,34 @@ const writeAuthFilesUiState = (state: AuthFilesUiState) => {
   }
 };
 
+const copyToClipboard = async (text: string): Promise<boolean> => {
+  try {
+    if (typeof navigator !== 'undefined' && navigator.clipboard?.writeText) {
+      await navigator.clipboard.writeText(text);
+      return true;
+    }
+  } catch {
+    // fallback below
+  }
+
+  try {
+    const textarea = document.createElement('textarea');
+    textarea.value = text;
+    textarea.style.position = 'fixed';
+    textarea.style.opacity = '0';
+    textarea.style.left = '-9999px';
+    textarea.style.top = '0';
+    document.body.appendChild(textarea);
+    textarea.focus();
+    textarea.select();
+    const copied = document.execCommand('copy');
+    document.body.removeChild(textarea);
+    return copied;
+  } catch {
+    return false;
+  }
+};
+
 interface PrefixProxyEditorState {
   fileName: string;
   loading: boolean;
@@ -1016,6 +1044,16 @@ export function AuthFilesPage() {
     }
   };
 
+  const copyTextWithNotification = async (text: string) => {
+    const copied = await copyToClipboard(text);
+    showNotification(
+      copied
+        ? t('notification.link_copied', { defaultValue: 'Copied to clipboard' })
+        : t('notification.copy_failed', { defaultValue: 'Copy failed' }),
+      copied ? 'success' : 'error'
+    );
+  };
+
   // 检查模型是否被 OAuth 排除
   const isModelExcluded = (modelId: string, providerType: string): boolean => {
     const providerKey = normalizeProviderKey(providerType);
@@ -2050,9 +2088,7 @@ export function AuthFilesPage() {
               onClick={() => {
                 if (selectedFile) {
                   const text = JSON.stringify(selectedFile, null, 2);
-                  navigator.clipboard.writeText(text).then(() => {
-                    showNotification(t('notification.link_copied'), 'success');
-                  });
+                  void copyTextWithNotification(text);
                 }
               }}
             >
@@ -2108,11 +2144,7 @@ export function AuthFilesPage() {
                   key={model.id}
                   className={`${styles.modelItem} ${isExcluded ? styles.modelItemExcluded : ''}`}
                   onClick={() => {
-                    navigator.clipboard.writeText(model.id);
-                    showNotification(
-                      t('notification.link_copied', { defaultValue: '已复制到剪贴板' }),
-                      'success'
-                    );
+                    void copyTextWithNotification(model.id);
                   }}
                   title={
                     isExcluded