fix: include actionable error details

src/app/(admin)/admin/error.tsx

@@ -2,6 +2,7 @@
 
 import { Button } from "@/components/ui/button";
 import { Card, CardContent } from "@/components/ui/card";
+import { getErrorMessage } from "@/lib/errors";
 
 export default function AdminError({
   error,
@@ -10,13 +11,18 @@ export default function AdminError({
   error: Error & { digest?: string };
   reset: () => void;
 }) {
+  const message = getErrorMessage(error, "管理后台页面加载失败");
+
   return (
     <div className="flex items-center justify-center min-h-[60vh]">
       <Card className="w-full max-w-md">
         <CardContent className="py-10 text-center space-y-5">
           <h1 className="text-xl font-semibold tracking-tight">出了点问题</h1>
-          <p className="text-sm text-destructive">
-            {error.message || "页面加载失败，请稍后重试。"}
+          <p className="text-sm leading-6 text-destructive break-words">
+            {message}
+          </p>
+          <p className="text-xs leading-5 text-muted-foreground">
+            如果重试后仍失败，请复制上面的错误详情给管理员排查。
           </p>
           <Button onClick={reset} className="h-10">重试</Button>
         </CardContent>