[Init] Zustand 초기 세팅

package.json

@@ -27,6 +27,7 @@
     "eslint-import-resolver-typescript": "^4.4.4",
     "react": "^19.2.0",
     "react-dom": "^19.2.0",
+    "zustand": "^5.0.9",
     "react-router-dom": "^7.11.0"
   },
   "devDependencies": {

src/app/store/index.ts

@@ -0,0 +1 @@
+export { useAuthStore } from '@shared/model/auth';

src/shared/lib/auth/token-storage.ts

@@ -0,0 +1,13 @@
+const ACCESS_TOKEN_KEY = 'accessToken';
+
+export const tokenStorage = {
+  get() {
+    return sessionStorage.getItem(ACCESS_TOKEN_KEY);
+  },
+  set(token: string) {
+    sessionStorage.setItem(ACCESS_TOKEN_KEY, token);
+  },
+  clear() {
+    sessionStorage.removeItem(ACCESS_TOKEN_KEY);
+  },
+};

src/shared/model/auth/auth.store.ts

@@ -0,0 +1,25 @@
+import { create } from 'zustand';
+
+import { tokenStorage } from '@/shared/lib/auth/token-storage';
+
+interface AuthState {
+  isLoggedIn: boolean;
+  actions: {
+    login: (accessToken: string) => void;
+    logout: () => void;
+  };
+}
+
+export const useAuthStore = create<AuthState>((set) => ({
+  isLoggedIn: Boolean(tokenStorage.get()),
+  actions: {
+    login: (accessToken) => {
+      tokenStorage.set(accessToken);
+      set({ isLoggedIn: true });
+    },
+    logout: () => {
+      tokenStorage.clear();
+      set({ isLoggedIn: false });
+    },
+  },
+}));

src/shared/model/auth/index.ts

@@ -0,0 +1 @@
+export { useAuthStore } from './auth.store';