Feat: useAuthStore 추가

frontend/src/stores/useAuthStore.ts

@@ -0,0 +1,37 @@
+import { create } from 'zustand';
+import { persist } from 'zustand/middleware';
+
+interface ProfileData {
+  id: number | null;
+  nickname: string;
+  profileImage: string;
+}
+
+interface AuthState {
+  isLoggedIn: boolean;
+  accessToken: string;
+  profile: ProfileData;
+  setLoggedIn: (status: boolean, token: string) => void;
+  setProfile: (profile: ProfileData) => void;
+  clearAuth: () => void;
+}
+
+const useAuthStore = create<AuthState>()(
+  persist(
+    (set) => ({
+      isLoggedIn: false,
+      accessToken: '',
+      profile: { id: null, nickname: '', profileImage: '' },
+      setLoggedIn: (status, token) => set({ isLoggedIn: status, accessToken: token }),
+      setProfile: (profile) => set({ profile }),
+      clearAuth: () =>
+        set({ isLoggedIn: false, accessToken: '', profile: { id: null, nickname: '', profileImage: '' } }),
+    }),
+    {
+      name: 'auth-storage',
+      getStorage: () => localStorage,
+    }
+  )
+);
+
+export default useAuthStore;