fix: 修复后台文章计数为0 + 分类编辑补全描述字段 + CSP放行外部图片 + 更新关于页描述

- 文章管理：计数请求补 page=1 参数，命中分页接口返回正确的 total
- 分类管理：编辑模式新增描述输入框，保存时一并提交 description
- CSP：img-src 加入 https: 允许加载外部图片
- 关于页：数据存储描述从 JSON 文件更正为 SQLite 数据库
- Footer：添加 ICP 备案号

src/app/admin/login/page.tsx

@@ -2,57 +2,62 @@
 
 import { useState } from "react";
 import { useRouter } from "next/navigation";
+import { useToast, safeFetch } from "@/components/Toast";
+import { ToastProvider } from "@/components/Toast";
+import { Input } from "@/components/ui/input";
+import { Label } from "@/components/ui/label";
+import { Button } from "@/components/ui/button";
 
 export default function LoginPage() {
+  return (
+    <ToastProvider>
+      <LoginForm />
+    </ToastProvider>
+  );
+}
+
+function LoginForm() {
   const [password, setPassword] = useState("");
-  const [error, setError] = useState("");
   const [loading, setLoading] = useState(false);
+  const { toast } = useToast();
   const router = useRouter();
 
   async function handleSubmit(e: React.FormEvent) {
     e.preventDefault();
     setLoading(true);
-    setError("");
-    const res = await fetch("/api/auth", {
-      method: "POST",
-      headers: { "Content-Type": "application/json" },
-      body: JSON.stringify({ password }),
-    });
-    if (res.ok) {
+    try {
+      await safeFetch("/api/auth", {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ password }),
+      }, toast);
       router.push("/admin");
-    } else {
-      const data = await res.json();
-      setError(data.error || "登录失败");
-    }
+    } catch { /* safeFetch 已弹 toast */ }
     setLoading(false);
   }
 
   return (
-    <div className="min-h-screen bg-parchment flex items-center justify-center px-4">
+    <div className="min-h-screen bg-background flex items-center justify-center px-4">
       <div className="w-full max-w-sm">
         <div className="text-center mb-10">
-          <h1 className="font-display text-3xl font-medium text-ink">后台管理</h1>
-          <p className="mt-2 font-sans text-sm text-ink-muted">asui.xyz</p>
+          <h1 className="font-display text-3xl font-medium">后台管理</h1>
+          <p className="mt-2 font-sans text-sm text-muted-foreground">asui.xyz</p>
         </div>
         <form onSubmit={handleSubmit} className="space-y-5">
-          <div>
-            <input
+          <div className="space-y-1.5">
+            <Label htmlFor="password">管理密码</Label>
+            <Input
+              id="password"
               type="password"
               placeholder="输入管理密码"
               value={password}
               onChange={(e) => setPassword(e.target.value)}
-              className="w-full px-4 py-3 rounded-xl border border-warm-gray/20 bg-cream font-sans text-sm text-ink placeholder:text-ink-muted/50 focus:outline-none focus:border-terracotta/40 transition-colors"
               autoFocus
             />
           </div>
-          {error && <p className="font-sans text-sm text-red-600">{error}</p>}
-          <button
-            type="submit"
-            disabled={loading}
-            className="w-full py-3 rounded-xl bg-ink text-cream font-sans text-sm tracking-wide hover:bg-terracotta transition-colors disabled:opacity-50"
-          >
+          <Button type="submit" disabled={loading} className="w-full">
             {loading ? "验证中..." : "登录"}
-          </button>
+          </Button>
         </form>
       </div>
     </div>