Revert "feat: use middleware to auth"

This reverts commit f57cdb5ec1.

src/components/AuthProvider.tsx

@@ -0,0 +1,46 @@
+'use client';
+
+import { usePathname, useRouter } from 'next/navigation';
+import { useEffect } from 'react';
+
+interface Props {
+  children: React.ReactNode;
+}
+
+export default function AuthProvider({ children }: Props) {
+  const router = useRouter();
+  const pathname = usePathname();
+
+  useEffect(() => {
+    // 登录页或 API 路径不做校验，避免死循环
+    if (pathname.startsWith('/login')) return;
+
+    const password = localStorage.getItem('password');
+    const fullPath =
+      typeof window !== 'undefined'
+        ? window.location.pathname + window.location.search
+        : pathname;
+
+    // 有密码时验证
+    (async () => {
+      try {
+        const res = await fetch('/api/login', {
+          method: 'POST',
+          headers: { 'Content-Type': 'application/json' },
+          body: JSON.stringify({ password }),
+        });
+
+        if (!res.ok) {
+          // 校验未通过，清理并跳转登录
+          localStorage.removeItem('password');
+          router.replace(`/login?redirect=${encodeURIComponent(fullPath)}`);
+        }
+      } catch (error) {
+        // 网络错误等也认为未登录
+        router.replace(`/login?redirect=${encodeURIComponent(fullPath)}`);
+      }
+    })();
+  }, [pathname, router]);
+
+  return <>{children}</>;
+}