refactor: 移除冗余注释和描述，优化管理员模块的代码结构

src/components/admin/login-form.tsx

@@ -8,14 +8,7 @@ import { isAxiosError } from "axios";
 
 import { Alert, AlertDescription, AlertTitle } from "@/components/ui/alert";
 import { Button } from "@/components/ui/button";
-import {
-  Card,
-  CardContent,
-  CardDescription,
-  CardFooter,
-  CardHeader,
-  CardTitle,
-} from "@/components/ui/card";
+import { Card, CardContent, CardFooter, CardHeader, CardTitle } from "@/components/ui/card";
 import { Input } from "@/components/ui/input";
 import { Label } from "@/components/ui/label";
 import { getAdminCaptcha, postAdminLogin } from "@/api";
@@ -151,9 +144,6 @@ export function LoginForm() {
             <CardTitle className="text-balance text-2xl font-semibold tracking-tight">
               {authModuleMeta.title}
             </CardTitle>
-            <CardDescription className="text-pretty text-sm leading-relaxed">
-              使用账号与密码登录；请输入图形验证码（不区分大小写）。
-            </CardDescription>
           </div>
         </CardHeader>
         <form onSubmit={onSubmit}>