diff --git a/src/lib/auth/__tests__/auth_session.test.ts b/src/lib/auth/__tests__/auth_session.test.ts
new file mode 100644
index 00000000..8188d6ac
--- /dev/null
+++ b/src/lib/auth/__tests__/auth_session.test.ts
@@ -0,0 +1,75 @@
+import { describe, expect, it, vi } from "vitest";
+
+import type { IAuthStorage } from "@/data/storage/auth";
+import { LoginStatus } from "@/data/dto/auth";
+import { Result } from "@/utils";
+
+import { hasCompleteBusinessAuthSession } from "../auth_session";
+
+function makeAuthStorageMock(input: {
+  loginToken?: string | null;
+  refreshToken?: string | null;
+  refreshTokenError?: Error;
+}): IAuthStorage {
+  return {
+    getLoginToken: vi.fn(async () => Result.ok(input.loginToken ?? null)),
+    setLoginToken: vi.fn(async () => Result.ok(undefined)),
+    hasLoginToken: vi.fn(async () => Result.ok(Boolean(input.loginToken))),
+    clearLoginToken: vi.fn(async () => Result.ok(undefined)),
+    getLoginProvider: vi.fn(async () => Result.ok(LoginStatus.Email)),
+    setLoginProvider: vi.fn(async () => Result.ok(undefined)),
+    clearLoginProvider: vi.fn(async () => Result.ok(undefined)),
+    getGuestToken: vi.fn(async () => Result.ok(null)),
+    setGuestToken: vi.fn(async () => Result.ok(undefined)),
+    hasGuestToken: vi.fn(async () => Result.ok(false)),
+    clearGuestToken: vi.fn(async () => Result.ok(undefined)),
+    getDeviceId: vi.fn(async () => Result.ok(null)),
+    setDeviceId: vi.fn(async () => Result.ok(undefined)),
+    getRefreshToken: vi.fn(async () =>
+      input.refreshTokenError
+        ? Result.err(input.refreshTokenError)
+        : Result.ok(input.refreshToken ?? null),
+    ),
+    setRefreshToken: vi.fn(async () => Result.ok(undefined)),
+    clearRefreshToken: vi.fn(async () => Result.ok(undefined)),
+    getFacebookId: vi.fn(async () => Result.ok(null)),
+    setFacebookId: vi.fn(async () => Result.ok(undefined)),
+    clearFacebookId: vi.fn(async () => Result.ok(undefined)),
+    clearAuthData: vi.fn(async () => Result.ok(undefined)),
+  };
+}
+
+describe("auth session helpers", () => {
+  it("treats a business session as complete when both tokens exist", async () => {
+    await expect(
+      hasCompleteBusinessAuthSession(
+        makeAuthStorageMock({
+          loginToken: "login-token",
+          refreshToken: "refresh-token",
+        }),
+      ),
+    ).resolves.toBe(true);
+  });
+
+  it("does not treat login token alone as a complete business session", async () => {
+    await expect(
+      hasCompleteBusinessAuthSession(
+        makeAuthStorageMock({
+          loginToken: "login-token",
+          refreshToken: null,
+        }),
+      ),
+    ).resolves.toBe(false);
+  });
+
+  it("does not restore a business session when refresh token cannot be read", async () => {
+    await expect(
+      hasCompleteBusinessAuthSession(
+        makeAuthStorageMock({
+          loginToken: "login-token",
+          refreshTokenError: new Error("storage unavailable"),
+        }),
+      ),
+    ).resolves.toBe(false);
+  });
+});
diff --git a/src/lib/auth/auth_session.ts b/src/lib/auth/auth_session.ts
index b2c8a9d1..4773a0f3 100644
--- a/src/lib/auth/auth_session.ts
+++ b/src/lib/auth/auth_session.ts
@@ -1,8 +1,18 @@
 "use client";
 
 import { AuthStorage } from "@/data/storage/auth/auth_storage";
+import type { IAuthStorage } from "@/data/storage/auth";
 
 export async function hasBusinessLoginToken(): Promise<boolean> {
-  const result = await AuthStorage.getInstance().getLoginToken();
-  return result.success && Boolean(result.data);
+  return hasCompleteBusinessAuthSession(AuthStorage.getInstance());
+}
+
+export async function hasCompleteBusinessAuthSession(
+  storage: IAuthStorage,
+): Promise<boolean> {
+  const loginTokenResult = await storage.getLoginToken();
+  if (!loginTokenResult.success || !loginTokenResult.data) return false;
+
+  const refreshTokenResult = await storage.getRefreshToken();
+  return refreshTokenResult.success && Boolean(refreshTokenResult.data);
 }
diff --git a/src/stores/auth/auth-actors.ts b/src/stores/auth/auth-actors.ts
index 972509ec..ee2e209d 100644
--- a/src/stores/auth/auth-actors.ts
+++ b/src/stores/auth/auth-actors.ts
@@ -10,6 +10,7 @@ import { fetchFacebookUserData } from "@/data/services";
 import { AuthStorage } from "@/data/storage/auth/auth_storage";
 import { UserStorage } from "@/data/storage/user/user_storage";
 import { deviceIdentifier, Logger, Result } from "@/utils";
+import { hasCompleteBusinessAuthSession } from "@/lib/auth/auth_session";
 
 import { readGuestId } from "./auth-helpers";
 
@@ -235,7 +236,9 @@ export const guestLoginActor = fromPromise<LoginStatus, void>(async () => {
 //   1. deviceIdentifier.getDeviceId()     —— 无则生成 + 落盘
 //      （生产环境使用 fingerprintjs；非生产环境使用本地 UUID）
 //      （给后续 OAuth/email 登录准备 deviceId，不在 splash 首次访问就 auto-create 游客）
-//   2. AuthStorage.getLoginToken()         —— 有 → 读取 loginProvider，缺省回退 "email"
+//   2. AuthStorage loginToken + refreshToken
+//      —— 两者都有 → 读取 loginProvider，缺省回退 "email"
+//      —— 任一缺失 → 不算业务登录态
 //   3. AuthStorage.getFacebookId()         —— 有 → facebookIdLogin → "facebook"
 //   4. AuthStorage.getGuestToken()         —— 有 → "guest"
 //   5. 都没有 → "notLoggedIn"（让用户显式选 OAuth / Email / Guest 入口）
@@ -245,9 +248,8 @@ export const checkAuthStatusActor = fromPromise<LoginStatus, void>(async () => {
   await deviceIdentifier.getDeviceId();
   const storage = AuthStorage.getInstance();
 
-  // 2. 查 loginToken
-  const loginTokenR = await storage.getLoginToken();
-  if (loginTokenR.success && loginTokenR.data) {
+  // 2. 查业务登录 token：loginToken 和 refreshToken 必须同时存在。
+  if (await hasCompleteBusinessAuthSession(storage)) {
     const providerR = await storage.getLoginProvider();
     if (providerR.success && isBusinessLoginProvider(providerR.data)) {
       return providerR.data;