refactor: serve static frontend with Go APIs

app/auth/admin-login/page.tsx

@@ -1,11 +1,5 @@
-import { redirect } from "next/navigation";
+import { ClientRedirect } from "@/components/browser-auth";
 
-export default async function AdminLoginPage({
-  searchParams
-}: {
-  searchParams?: Promise<Record<string, string | string[] | undefined>>;
-}) {
-  const params = await searchParams;
-  const next = Array.isArray(params?.next) ? params?.next[0] : params?.next;
-  redirect(next ? `/auth/login?next=${encodeURIComponent(next)}` : "/auth/login");
+export default function AdminLoginPage() {
+  return <ClientRedirect to="/auth/login" forwardNext />;
 }

app/auth/login/page.tsx

@@ -1,38 +1,4 @@
-import { redirect } from "next/navigation";
 import { AuthLoginPanel } from "@/components/auth-login-panel";
-import { getAuthRuntimeConfig, safeNextPath } from "@/lib/auth/config";
-import { getOptionalAuthSession } from "@/lib/server/auth/current-user";
-
-const errorMessages: Record<string, string> = {
-  auth_not_configured: "账号认证配置不完整，请联系管理员。",
-  callback_failed: "登录失败，请重新登录。",
-  state_invalid: "登录状态已失效，请重新登录。"
-};
-
-export default async function LoginPage({
-  searchParams
-}: {
-  searchParams?: Promise<Record<string, string | string[] | undefined>>;
-}) {
-  const params = await searchParams;
-  const next = safeNextPath(singleParam(params?.next));
-  const session = await getOptionalAuthSession();
-  if (session) redirect(next);
-
-  const config = getAuthRuntimeConfig();
-  const errorCode = singleParam(params?.error);
-  const message = errorCode ? errorMessages[errorCode] || "登录失败，请重新登录。" : null;
-
-  return (
-    <AuthLoginPanel
-      next={next}
-      configured={config.configured}
-      message={message}
-      missing={!config.configured && config.required ? config.missing : []}
-    />
-  );
-}
-
-function singleParam(value: string | string[] | undefined): string | undefined {
-  return Array.isArray(value) ? value[0] : value;
+export default function LoginPage() {
+  return <AuthLoginPanel />;
 }