diff --git a/frontend/src/store/slices/authSlice.ts b/frontend/src/store/slices/authSlice.ts
new file mode 100644
index 0000000..27f3436
--- /dev/null
+++ b/frontend/src/store/slices/authSlice.ts
@@ -0,0 +1,36 @@
+// REQ-USR-004: 全局登录态（token + user）。token 持久化到 localStorage（D6）。
+import { createSlice, type PayloadAction } from '@reduxjs/toolkit';
+import { TOKEN_STORAGE_KEY } from '../../api/request';
+import type { AuthUser } from '../../api/types';
+
+export interface AuthState {
+  token: string | null;
+  user: AuthUser | null;
+}
+
+const initialState: AuthState = {
+  token: localStorage.getItem(TOKEN_STORAGE_KEY),
+  user: null,
+};
+
+const authSlice = createSlice({
+  name: 'auth',
+  initialState,
+  reducers: {
+    // 写 token + user，并持久化 token（reducer 内副作用为 MVP 取舍，全项目统一，D6）
+    setCredentials(state, action: PayloadAction<{ token: string; user: AuthUser }>) {
+      state.token = action.payload.token;
+      state.user = action.payload.user;
+      localStorage.setItem(TOKEN_STORAGE_KEY, action.payload.token);
+    },
+    // 清登录态并移除持久化 token
+    clearCredentials(state) {
+      state.token = null;
+      state.user = null;
+      localStorage.removeItem(TOKEN_STORAGE_KEY);
+    },
+  },
+});
+
+export const { setCredentials, clearCredentials } = authSlice.actions;
+export default authSlice.reducer;
diff --git a/frontend/src/store/store.ts b/frontend/src/store/store.ts
new file mode 100644
index 0000000..2d70715
--- /dev/null
+++ b/frontend/src/store/store.ts
@@ -0,0 +1,12 @@
+// REQ-USR-004: Redux store（FE 共享骨架，后续 FE-02~04 复用）
+import { configureStore } from '@reduxjs/toolkit';
+import authReducer from './slices/authSlice';
+
+export const store = configureStore({
+  reducer: {
+    auth: authReducer,
+  },
+});
+
+export type RootState = ReturnType<typeof store.getState>;
+export type AppDispatch = typeof store.dispatch;
diff --git a/frontend/tests/unit/authSlice.test.ts b/frontend/tests/unit/authSlice.test.ts
new file mode 100644
index 0000000..b66b765
--- /dev/null
+++ b/frontend/tests/unit/authSlice.test.ts
@@ -0,0 +1,42 @@
+import { describe, it, expect, beforeEach, vi } from 'vitest';
+import authReducer, {
+  setCredentials,
+  clearCredentials,
+  type AuthState,
+} from '../../src/store/slices/authSlice';
+import { TOKEN_STORAGE_KEY } from '../../src/api/request';
+import type { AuthUser } from '../../src/api/types';
+
+const user: AuthUser = { id: 1, sUserName: 'admin', sUserType: '超级管理员', sLanguage: '中文' };
+
+describe('authSlice', () => {
+  beforeEach(() => {
+    localStorage.clear();
+  });
+
+  it('setCredentials stores token and user and persists token', () => {
+    const start: AuthState = { token: null, user: null };
+    const next = authReducer(start, setCredentials({ token: 't', user }));
+    expect(next.token).toBe('t');
+    expect(next.user).toEqual(user);
+    expect(localStorage.getItem(TOKEN_STORAGE_KEY)).toBe('t');
+  });
+
+  it('clearCredentials clears state and removes persisted token', () => {
+    localStorage.setItem(TOKEN_STORAGE_KEY, 't');
+    const start: AuthState = { token: 't', user };
+    const next = authReducer(start, clearCredentials());
+    expect(next.token).toBeNull();
+    expect(next.user).toBeNull();
+    expect(localStorage.getItem(TOKEN_STORAGE_KEY)).toBeNull();
+  });
+
+  it('initialState reads persisted token', async () => {
+    localStorage.setItem(TOKEN_STORAGE_KEY, 'persisted-tk');
+    // 重置模块缓存，使 initialState 在带 token 的 localStorage 下重新求值
+    vi.resetModules();
+    const mod = await import('../../src/store/slices/authSlice');
+    const initial = mod.default(undefined, { type: '@@INIT' });
+    expect(initial.token).toBe('persisted-tk');
+  });
+});