diff --git a/docs/technical/README.md b/docs/technical/README.md
index a3c56e3d..3ae257d1 100644
--- a/docs/technical/README.md
+++ b/docs/technical/README.md
@@ -10,6 +10,7 @@
 - [SPACETIME_DEV_URI_HOTFIX_2026-04-20.md](./SPACETIME_DEV_URI_HOTFIX_2026-04-20.md)：修复开发默认配置把 Spacetime 连接误指向 Vite `3000` 端口的问题。
 - [SPACETIME_AUTH_TOKEN_FALLBACK_HOTFIX_2026-04-20.md](./SPACETIME_AUTH_TOKEN_FALLBACK_HOTFIX_2026-04-20.md)：本地 token 失效时自动降级匿名连接，并提示“登录已过期”的热修记录。
 - [STDB_AUTH_TAIL_PHASE1_AUTO_GUEST_CREDENTIAL_REMOVAL_2026-04-20.md](./STDB_AUTH_TAIL_PHASE1_AUTO_GUEST_CREDENTIAL_REMOVAL_2026-04-20.md)：Auth 尾巴清理第一段，删除前端自动游客用户名/密码残留。
+- [STDB_AUTH_TAIL_PHASE2_TOKEN_SLOT_SPLIT_2026-04-20.md](./STDB_AUTH_TAIL_PHASE2_TOKEN_SLOT_SPLIT_2026-04-20.md)：将 STDB token 与旧 HTTP Bearer token 拆成独立存储槽。
 - [TASK_AUTO_COMMIT_WORKFLOW_2026-04-20.md](./TASK_AUTO_COMMIT_WORKFLOW_2026-04-20.md)：任务完成后按文件边界自动提交的脚本与协作约定。
 - [NODE_DEV_STARTUP_HOTFIX_2026-04-20.md](./NODE_DEV_STARTUP_HOTFIX_2026-04-20.md)：`npm run dev` 启动失败的热修记录、根因与验证结果。
 - [NODE_SERVER_KNOWLEDGE_GRAPH_2026-04-08.md](./NODE_SERVER_KNOWLEDGE_GRAPH_2026-04-08.md)：当前 Node 运行时后端的技术栈、入口、鉴权、存储与接口知识图谱。
diff --git a/docs/technical/STDB_AUTH_TAIL_PHASE2_TOKEN_SLOT_SPLIT_2026-04-20.md b/docs/technical/STDB_AUTH_TAIL_PHASE2_TOKEN_SLOT_SPLIT_2026-04-20.md
new file mode 100644
index 00000000..884232c0
--- /dev/null
+++ b/docs/technical/STDB_AUTH_TAIL_PHASE2_TOKEN_SLOT_SPLIT_2026-04-20.md
@@ -0,0 +1,73 @@
+# STDB Auth 尾巴清理 Phase 2：拆分 STDB Token 与旧 HTTP Bearer 存储槽（2026-04-20）
+
+## 1. 本轮目标
+
+在不打断现有 `/api/runtime/story/*` 旧链路的前提下，把两种不同语义的 token 从同一个 localStorage key 中拆开：
+
+1. Spacetime 连接 token
+2. 旧 Express Bearer access token
+
+## 2. 背景问题
+
+此前前端把这两种 token 混存到同一个 key：
+
+- `genarrative.auth.access-token.v1`
+
+这会带来两个直接问题：
+
+1. `AuthGate` 和 `authService` 无法区分“当前是在恢复 STDB 会话”还是“当前只是旧 HTTP Bearer 还在”
+2. 后续删除 `/api/auth/refresh` 和 `/api/runtime/story/*` 时，很容易互相打断
+
+## 3. 本轮落地
+
+### 3.1 新的存储语义
+
+- HTTP Bearer:
+  - `genarrative.auth.http-access-token.v1`
+- Spacetime token:
+  - `genarrative.auth.spacetime-token.v1`
+
+### 3.2 代码调整
+
+1. `src/services/apiClient.ts`
+   - 保留旧 HTTP token API：
+     - `getStoredAccessToken`
+     - `setStoredAccessToken`
+     - `clearStoredAccessToken`
+   - 新增 STDB token API：
+     - `getStoredSpacetimeToken`
+     - `setStoredSpacetimeToken`
+     - `clearStoredSpacetimeToken`
+2. `src/spacetime/client.ts`
+   - Spacetime 连接改为只读写 STDB token key
+3. `src/services/authService.ts`
+   - 账号恢复链只依据 STDB token 判断是否尝试恢复连接
+4. `src/components/auth/AuthGate.tsx`
+   - UI 启动时只依据 STDB token 判断是否走会话恢复
+
+### 3.3 当前保留不变的旧链路
+
+1. `fetchWithApiAuth()`
+2. `/api/auth/refresh`
+3. `/api/runtime/story/*` 的旧 Bearer 注入
+
+这些内容仍继续只使用 HTTP token key。
+
+## 4. 当前阶段意义
+
+这一步不是最终删除旧 JWT，而是先把 STDB 会话和旧 Express 会话拆成两个独立层：
+
+1. STDB auth 可以继续独立演进
+2. runtime story 旧链路暂时还能工作
+3. 后续迁 story 到 STDB 时，可以单独移除 HTTP token 相关逻辑
+
+## 5. 验证
+
+已补定向测试覆盖：
+
+1. `src/services/apiClient.test.ts`
+   - 验证 HTTP token 与 STDB token 独立存储
+2. `src/services/authService.test.ts`
+   - 验证 STDB token 失效回退匿名连接
+3. `src/components/auth/AuthGate.test.tsx`
+   - 验证 UI 恢复链改为读取 STDB token
diff --git a/src/components/auth/AuthGate.test.tsx b/src/components/auth/AuthGate.test.tsx
index 721fb488..f595677b 100644
--- a/src/components/auth/AuthGate.test.tsx
+++ b/src/components/auth/AuthGate.test.tsx
@@ -9,7 +9,7 @@ import { AuthGate } from './AuthGate';
 import { useAuthUi } from './AuthUiContext';
 
 const authMocks = vi.hoisted(() => ({
-  getStoredAccessToken: vi.fn(),
+  getStoredSpacetimeToken: vi.fn(),
   ensureAutoAuthUser: vi.fn(),
   getAuthLoginOptions: vi.fn(),
   getCurrentAuthUser: vi.fn(),
@@ -21,7 +21,7 @@ const authMocks = vi.hoisted(() => ({
 
 vi.mock('../../services/apiClient', () => ({
   AUTH_STATE_EVENT: 'genarrative-auth-state-changed',
-  getStoredAccessToken: authMocks.getStoredAccessToken,
+  getStoredSpacetimeToken: authMocks.getStoredSpacetimeToken,
 }));
 
 vi.mock('../../services/authService', () => ({
@@ -89,7 +89,7 @@ const mockUser: AuthUser = {
 
 beforeEach(() => {
   vi.clearAllMocks();
-  authMocks.getStoredAccessToken.mockReturnValue(null);
+  authMocks.getStoredSpacetimeToken.mockReturnValue(null);
   authMocks.consumeAuthCallbackResult.mockReturnValue(null);
   authMocks.getCurrentAuthUser.mockReset();
   authMocks.loginWithPhoneCode.mockResolvedValue(mockUser);
@@ -136,7 +136,7 @@ test('auth gate keeps platform content visible when phone login is available', a
 });
 
 test('auth gate renders bind phone screen for pending bind users', async () => {
-  authMocks.getStoredAccessToken.mockReturnValue('token');
+  authMocks.getStoredSpacetimeToken.mockReturnValue('token');
   authMocks.getCurrentAuthUser.mockResolvedValue({
     user: {
       ...mockUser,
@@ -156,7 +156,7 @@ test('auth gate renders bind phone screen for pending bind users', async () => {
 });
 
 test('auth gate shows recovery notice after token fallback', async () => {
-  authMocks.getStoredAccessToken.mockReturnValue('token');
+  authMocks.getStoredSpacetimeToken.mockReturnValue('token');
   authMocks.getCurrentAuthUser.mockResolvedValue({
     user: mockUser,
     availableLoginMethods: ['phone'],
diff --git a/src/components/auth/AuthGate.tsx b/src/components/auth/AuthGate.tsx
index 751b1383..0c124547 100644
--- a/src/components/auth/AuthGate.tsx
+++ b/src/components/auth/AuthGate.tsx
@@ -10,7 +10,7 @@ import {
 import { useGameSettings } from '../../hooks/useGameSettings';
 import {
   AUTH_STATE_EVENT,
-  getStoredAccessToken,
+  getStoredSpacetimeToken,
 } from '../../services/apiClient';
 import {
   type AuthAuditLogEntry,
@@ -253,7 +253,7 @@ export function AuthGate({ children }: AuthGateProps) {
         setShowLoginModal(true);
       }
 
-      const token = getStoredAccessToken();
+      const token = getStoredSpacetimeToken();
       if (!token) {
         await resolveGuestFallback();
         return;
diff --git a/src/services/apiClient.test.ts b/src/services/apiClient.test.ts
index cfd465bf..6ce8a642 100644
--- a/src/services/apiClient.test.ts
+++ b/src/services/apiClient.test.ts
@@ -3,10 +3,13 @@ import { beforeEach, describe, expect, it, vi } from 'vitest';
 import {
   ApiClientError,
   clearStoredAccessToken,
+  clearStoredSpacetimeToken,
   fetchWithApiAuth,
   getStoredAccessToken,
+  getStoredSpacetimeToken,
   requestJson,
   setStoredAccessToken,
+  setStoredSpacetimeToken,
 } from './apiClient';
 
 function createMemoryStorage() {
@@ -63,6 +66,7 @@ describe('apiClient', () => {
     });
     fetchMock.mockReset();
     clearStoredAccessToken();
+    clearStoredSpacetimeToken();
   });
 
   it('attaches auth headers and clears stale tokens on unauthorized responses', async () => {
@@ -157,6 +161,19 @@ describe('apiClient', () => {
     );
   });
 
+  it('stores spacetime tokens independently from http access tokens', () => {
+    setStoredAccessToken('http-token', { emit: false });
+    setStoredSpacetimeToken('stdb-token', { emit: false });
+
+    expect(getStoredAccessToken()).toBe('http-token');
+    expect(getStoredSpacetimeToken()).toBe('stdb-token');
+
+    clearStoredSpacetimeToken({ emit: false });
+
+    expect(getStoredAccessToken()).toBe('http-token');
+    expect(getStoredSpacetimeToken()).toBe('');
+  });
+
   it('retries transient get requests before unwrapping the response envelope', async () => {
     fetchMock
       .mockRejectedValueOnce(new TypeError('network unavailable'))
diff --git a/src/services/apiClient.ts b/src/services/apiClient.ts
index f739c682..87539298 100644
--- a/src/services/apiClient.ts
+++ b/src/services/apiClient.ts
@@ -8,7 +8,8 @@ import {
   unwrapApiResponse,
 } from '../../packages/shared/src/http';
 
-const ACCESS_TOKEN_KEY = 'genarrative.auth.access-token.v1';
+const HTTP_ACCESS_TOKEN_KEY = 'genarrative.auth.http-access-token.v1';
+const SPACETIME_TOKEN_KEY = 'genarrative.auth.spacetime-token.v1';
 export const AUTH_STATE_EVENT = 'genarrative-auth-state-changed';
 const REQUEST_ID_HEADER = 'x-request-id';
 const API_VERSION_HEADER = 'x-api-version';
@@ -330,15 +331,16 @@ function emitAuthStateChange() {
   }
 }
 
-export function getStoredAccessToken() {
+function readStoredToken(storageKey: string) {
   if (!canUseLocalStorage()) {
     return '';
   }
 
-  return window.localStorage.getItem(ACCESS_TOKEN_KEY)?.trim() || '';
+  return window.localStorage.getItem(storageKey)?.trim() || '';
 }
 
-export function setStoredAccessToken(
+function writeStoredToken(
+  storageKey: string,
   token: string,
   options: {
     emit?: boolean;
@@ -350,16 +352,17 @@ export function setStoredAccessToken(
 
   const nextToken = token.trim();
   if (nextToken) {
-    window.localStorage.setItem(ACCESS_TOKEN_KEY, nextToken);
+    window.localStorage.setItem(storageKey, nextToken);
   } else {
-    window.localStorage.removeItem(ACCESS_TOKEN_KEY);
+    window.localStorage.removeItem(storageKey);
   }
   if (options.emit !== false) {
     emitAuthStateChange();
   }
 }
 
-export function clearStoredAccessToken(
+function removeStoredToken(
+  storageKey: string,
   options: {
     emit?: boolean;
   } = {},
@@ -368,12 +371,54 @@ export function clearStoredAccessToken(
     return;
   }
 
-  window.localStorage.removeItem(ACCESS_TOKEN_KEY);
+  window.localStorage.removeItem(storageKey);
   if (options.emit !== false) {
     emitAuthStateChange();
   }
 }
 
+export function getStoredAccessToken() {
+  return readStoredToken(HTTP_ACCESS_TOKEN_KEY);
+}
+
+export function setStoredAccessToken(
+  token: string,
+  options: {
+    emit?: boolean;
+  } = {},
+) {
+  writeStoredToken(HTTP_ACCESS_TOKEN_KEY, token, options);
+}
+
+export function clearStoredAccessToken(
+  options: {
+    emit?: boolean;
+  } = {},
+) {
+  removeStoredToken(HTTP_ACCESS_TOKEN_KEY, options);
+}
+
+export function getStoredSpacetimeToken() {
+  return readStoredToken(SPACETIME_TOKEN_KEY);
+}
+
+export function setStoredSpacetimeToken(
+  token: string,
+  options: {
+    emit?: boolean;
+  } = {},
+) {
+  writeStoredToken(SPACETIME_TOKEN_KEY, token, options);
+}
+
+export function clearStoredSpacetimeToken(
+  options: {
+    emit?: boolean;
+  } = {},
+) {
+  removeStoredToken(SPACETIME_TOKEN_KEY, options);
+}
+
 function withAuthorizationHeaders(
   headers?: HeadersInit,
   options: Pick<ApiRequestOptions, 'omitEnvelopeHeader' | 'skipAuth'> = {},
diff --git a/src/services/authService.test.ts b/src/services/authService.test.ts
index 3036ef57..8fd2f62e 100644
--- a/src/services/authService.test.ts
+++ b/src/services/authService.test.ts
@@ -2,8 +2,8 @@ import { beforeEach, describe, expect, it, vi } from 'vitest';
 
 import {
   ApiClientError,
-  clearStoredAccessToken,
-  setStoredAccessToken,
+  clearStoredSpacetimeToken,
+  setStoredSpacetimeToken,
 } from './apiClient';
 import {
   getAuthRiskBlocks,
@@ -182,7 +182,7 @@ describe('authService with SpacetimeDB', () => {
 
     spacetimeMocks.ensureSpacetimeConnection.mockReset();
     spacetimeMocks.disconnectSpacetimeConnection.mockReset();
-    clearStoredAccessToken();
+    clearStoredSpacetimeToken();
   });
 
   it('extracts captcha challenge details from api errors', () => {
@@ -240,7 +240,7 @@ describe('authService with SpacetimeDB', () => {
 
   it('falls back to anonymous auth when stored token connection stalls', async () => {
     vi.useFakeTimers();
-    setStoredAccessToken('expired-token', { emit: false });
+    setStoredSpacetimeToken('expired-token', { emit: false });
 
     const stalledConnection = new Promise<never>(() => {});
     spacetimeMocks.ensureSpacetimeConnection
@@ -268,7 +268,7 @@ describe('authService with SpacetimeDB', () => {
         message: '登录已过期，已切换为匿名账号。',
       });
       expect(spacetimeMocks.disconnectSpacetimeConnection).toHaveBeenCalled();
-      expect(window.localStorage.getItem('genarrative.auth.access-token.v1')).toBeNull();
+      expect(window.localStorage.getItem('genarrative.auth.spacetime-token.v1')).toBeNull();
     } finally {
       vi.useRealTimers();
     }
diff --git a/src/services/authService.ts b/src/services/authService.ts
index cf35f5ed..38c2253e 100644
--- a/src/services/authService.ts
+++ b/src/services/authService.ts
@@ -33,8 +33,8 @@ import {
 } from '../spacetime/mappers';
 import {
   ApiClientError,
-  clearStoredAccessToken,
-  getStoredAccessToken,
+  clearStoredSpacetimeToken,
+  getStoredSpacetimeToken,
 } from './apiClient';
 
 export type { AuthUser } from '../../packages/shared/src/contracts/auth';
@@ -150,7 +150,7 @@ async function readCurrentSessionWithConnectionTimeout(timeoutMs: number | null)
 }
 
 async function readCurrentSessionWithRetry() {
-  const hasStoredToken = Boolean(getStoredAccessToken());
+  const hasStoredToken = Boolean(getStoredSpacetimeToken());
 
   try {
     const session = await readCurrentSessionWithConnectionTimeout(
@@ -166,7 +166,7 @@ async function readCurrentSessionWithRetry() {
     }
 
     disconnectSpacetimeConnection();
-    clearStoredAccessToken({ emit: false });
+    clearStoredSpacetimeToken({ emit: false });
     const session = await readCurrentSessionFromConnection();
     return {
       ...session,
@@ -231,7 +231,7 @@ export function getCaptchaChallengeFromError(
 
 export function clearAuthSession() {
   disconnectSpacetimeConnection();
-  clearStoredAccessToken();
+  clearStoredSpacetimeToken();
 }
 
 export async function sendPhoneLoginCode(
diff --git a/src/spacetime/client.ts b/src/spacetime/client.ts
index 69faa097..f573b8ff 100644
--- a/src/spacetime/client.ts
+++ b/src/spacetime/client.ts
@@ -1,6 +1,11 @@
 import type { Identity } from 'spacetimedb';
 
-import { AUTH_STATE_EVENT, clearStoredAccessToken, getStoredAccessToken, setStoredAccessToken } from '../services/apiClient';
+import {
+  AUTH_STATE_EVENT,
+  clearStoredSpacetimeToken,
+  getStoredSpacetimeToken,
+  setStoredSpacetimeToken,
+} from '../services/apiClient';
 import { DbConnection } from './generated';
 
 const DEFAULT_SPACETIME_URI = 'wss://maincloud.spacetimedb.com';
@@ -172,7 +177,7 @@ export function disconnectSpacetimeConnection(options: { clearToken?: boolean }
   resetReadyState();
   currentConnection?.disconnect();
   if (options.clearToken) {
-    clearStoredAccessToken({ emit: false });
+    clearStoredSpacetimeToken({ emit: false });
   }
 }
 
@@ -181,10 +186,10 @@ export function buildSpacetimeConnection() {
     .withUri(resolveSpacetimeUri())
     .withDatabaseName(resolveDatabaseName())
     .withLightMode(true)
-    .withToken(getStoredAccessToken() || undefined)
+    .withToken(getStoredSpacetimeToken() || undefined)
     .onConnect((nextConnection, _identity, token) => {
       activeConnection = nextConnection;
-      setStoredAccessToken(token, { emit: false });
+      setStoredSpacetimeToken(token, { emit: false });
       installConnectionCallbacks(nextConnection);
       if (hasActiveSubscription) {
         resolveReady?.(nextConnection);