refactor(auth): migrate social login to next-auth

src/app/auth/components/auth-screen.tsx

@@ -16,7 +16,7 @@ import { useRouter } from "next/navigation";
 import { useAuthState, useAuthDispatch } from "@/stores/auth/auth-context";
 import { useChatDispatch } from "@/stores/chat/chat-context";
 import { useUserDispatch } from "@/stores/user/user-context";
-import { useAuthGate } from "@/lib/auth/use-auth-gate";
+import { useAuthGate } from "@/lib/auth/nextauth";
 import { ROUTES } from "@/lib/routes";
 import { MobileShell } from "@/app/_components/core/mobile-shell";
 import { AuthPanel } from "@/app/auth/components/auth-panel";
@@ -42,7 +42,7 @@ export function AuthScreen({
     if (isAuthed) router.replace(ROUTES.chat);
   }, [isAuthed, router]);
 
-  // 登录成功 → 通知 Chat + User + 跳转
+  // 邮箱登录成功 → 通知 Chat + User + 跳转
   useEffect(() => {
     if (state.isSuccess && !wasSuccess.current) {
       wasSuccess.current = true;
@@ -63,11 +63,7 @@ export function AuthScreen({
           padding: "var(--spacing-lg)",
         }}
       >
-        <AuthPanel
-          onGoogleSuccess={(idToken, email) => {
-            authDispatch({ type: "AuthWebGoogleLoginSuccess", idToken, email });
-          }}
-        />
+        <AuthPanel />
       </div>
     </MobileShell>
   );