✨Feat: 로그인/회원가입 로직 구현

src/app/features/auth/api/authApi.ts

@@ -0,0 +1,12 @@
+import api from '@/app/shared/lib/axios'
+import { AUTH_ENDPOINT } from './authEndpoint'
+import { LoginRequest, SignupRequest, LoginResponse } from '../types/auth.type'
+import { User as SignupResponse } from '@/app/shared/types/user.type'
+
+export const login = (data: LoginRequest) => {
+  return api.post<LoginResponse>(AUTH_ENDPOINT.LOGIN, data)
+}
+
+export const signup = (data: SignupRequest) => {
+  return api.post<SignupResponse>(AUTH_ENDPOINT.SIGNUP, data)
+}

src/app/features/auth/api/authEndpoint.ts

@@ -0,0 +1,4 @@
+export const AUTH_ENDPOINT = {
+  LOGIN: '/15-2/auth/login',
+  SIGNUP: '/15-2/users',
+}

src/app/features/auth/hooks/useAuth.ts

@@ -0,0 +1,34 @@
+import { useAuthStore } from '../store/useAuthStore'
+import { login as loginApi, signup as signupApi } from '../api/authApi'
+import { LoginRequest, SignupRequest } from '../types/auth.type'
+
+export function useAuth() {
+  const { setAccessToken, setUser, clearAuthState } = useAuthStore()
+
+  async function login(data: LoginRequest) {
+    const response = await loginApi(data)
+    const token = response.data.accessToken
+    const user = response.data.user
+
+    if (token && user) {
+      setAccessToken(token)
+      setUser(user)
+    } else {
+      throw new Error('유효하지 않은 응답입니다.')
+    }
+  }
+
+  async function signup(data: SignupRequest) {
+    await signupApi(data)
+  }
+
+  function logout() {
+    clearAuthState()
+  }
+
+  return {
+    login,
+    signup,
+    logout,
+  }
+}

src/app/features/auth/store/useAuthStore.ts

@@ -0,0 +1,20 @@
+import { create } from 'zustand'
+import { persist } from 'zustand/middleware'
+import { AuthState } from '../types/auth.type'
+
+export const useAuthStore = create<AuthState>()(
+  persist(
+    (set) => ({
+      accessToken: null,
+      user: null,
+      isLoggedIn: false,
+      setAccessToken: (token) => set({ accessToken: token, isLoggedIn: true }),
+      setUser: (user) => set({ user: user }),
+      clearAuthState: () =>
+        set({ accessToken: null, user: null, isLoggedIn: false }),
+    }),
+    {
+      name: 'auth-storage',
+    },
+  ),
+)

src/app/features/auth/types/auth.type.ts

@@ -0,0 +1,26 @@
+import { User } from '@/app/shared/types/user.type'
+
+export interface LoginRequest {
+  email: string
+  password: string
+}
+
+export interface LoginResponse {
+  accessToken: string
+  user: User
+}
+
+export interface SignupRequest {
+  nickname: string
+  email: string
+  password: string
+}
+
+export interface AuthState {
+  accessToken: string | null
+  user: User | null
+  isLoggedIn: boolean
+  setAccessToken: (token: string) => void
+  setUser: (user: User) => void
+  clearAuthState: () => void
+}

src/app/shared/lib/axios.ts

@@ -0,0 +1,24 @@
+import axios from 'axios'
+import { useAuthStore } from '@/app/features/auth/store/useAuthStore'
+import { AUTH_ENDPOINT } from '@/app/features/auth/api/authEndpoint'
+
+const api = axios.create({
+  baseURL: process.env.NEXT_PUBLIC_API_URL,
+})
+
+api.interceptors.request.use(
+  (config) => {
+    const token = useAuthStore.getState().accessToken
+    const publicPaths = [AUTH_ENDPOINT.LOGIN, AUTH_ENDPOINT.SIGNUP]
+
+    if (!publicPaths.includes(config.url || '') && token) {
+      config.headers.Authorization = `Bearer ${token}`
+    }
+    return config
+  },
+  (error) => {
+    return Promise.reject(error)
+  },
+)
+
+export default api

src/app/shared/types/user.type.ts

@@ -1,9 +1,8 @@
 export interface User {
   id: number
-  name: string
   email: string
-  avatarUrl?: string // optional
-  role?: 'user' | 'admin' // optional 예시
-  createdAt?: string // optional ISO date string
-  updatedAt?: string // optional ISO date string
+  nickname: string
+  profileImageUrl: string | null
+  createdAt?: string
+  updatedAt?: string
 }