인증 영역 개발 완료 (로그인, 회원가입, 프로필 관리)

- 로그인 페이지: 이메일 + 비밀번호 로그인, 소셜 로그인 버튼
- 회원가입 페이지: 3단계 funnel (계정정보, 개인정보, 사업장정보)
- 프로필 관리 페이지: 기본정보/매장정보 수정, 비밀번호 변경, 로그아웃
- MUI v6 + React Hook Form + Zod 검증
- Next.js 14 App Router, TypeScript 5

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/stores/authStore.ts

@@ -0,0 +1,40 @@
+import { create } from 'zustand';
+import { persist } from 'zustand/middleware';
+
+interface User {
+  id: string;
+  name: string;
+  email: string;
+  phone: string;
+  businessName?: string;
+  businessType?: string;
+}
+
+interface AuthState {
+  user: User | null;
+  token: string | null;
+  isAuthenticated: boolean;
+  setUser: (user: User | null) => void;
+  setToken: (token: string | null) => void;
+  login: (user: User, token: string) => void;
+  logout: () => void;
+}
+
+export const useAuthStore = create<AuthState>()(
+  persist(
+    (set) => ({
+      user: null,
+      token: null,
+      isAuthenticated: false,
+      setUser: (user) => set({ user, isAuthenticated: !!user }),
+      setToken: (token) => set({ token }),
+      login: (user, token) =>
+        set({ user, token, isAuthenticated: true }),
+      logout: () =>
+        set({ user: null, token: null, isAuthenticated: false }),
+    }),
+    {
+      name: 'auth-storage',
+    }
+  )
+);

src/stores/uiStore.ts

@@ -0,0 +1,31 @@
+import { create } from 'zustand';
+
+interface UIState {
+  isLoading: boolean;
+  isSidebarOpen: boolean;
+  toast: {
+    open: boolean;
+    message: string;
+    severity: 'success' | 'error' | 'warning' | 'info';
+  };
+  setLoading: (isLoading: boolean) => void;
+  toggleSidebar: () => void;
+  showToast: (message: string, severity?: 'success' | 'error' | 'warning' | 'info') => void;
+  hideToast: () => void;
+}
+
+export const useUIStore = create<UIState>((set) => ({
+  isLoading: false,
+  isSidebarOpen: false,
+  toast: {
+    open: false,
+    message: '',
+    severity: 'info',
+  },
+  setLoading: (isLoading) => set({ isLoading }),
+  toggleSidebar: () => set((state) => ({ isSidebarOpen: !state.isSidebarOpen })),
+  showToast: (message, severity = 'info') =>
+    set({ toast: { open: true, message, severity } }),
+  hideToast: () =>
+    set((state) => ({ toast: { ...state.toast, open: false } })),
+}));