refactor(app): tighten feature boundaries

src/app/splash/splash-screen.tsx

@@ -4,8 +4,8 @@ import { useEffect } from "react";
 import { useRouter } from "next/navigation";
 
 import { MobileShell } from "@/app/_components/core";
+import { hasBusinessLoginToken } from "@/lib/auth/auth_session";
 import { useAuthDispatch, useAuthState } from "@/stores/auth/auth-context";
-import { AuthStorage } from "@/data/storage/auth/auth_storage";
 import { ROUTES } from "@/router/routes";
 import { pwaUtil, Logger } from "@/utils";
 
@@ -48,9 +48,7 @@ export function SplashScreen() {
   useEffect(() => {
     let cancelled = false;
     void (async () => {
-      // 用 getLoginToken() 拿 string | null（不是 hasLoginToken() 拿 boolean）
-      const r = await AuthStorage.getInstance().getLoginToken();
-      if (!cancelled && r.success && r.data) {
+      if (!cancelled && (await hasBusinessLoginToken())) {
         router.replace(ROUTES.chat);
       }
     })();