feat: autenticação mockada com cookie

front-end/app/composables/useAuth.ts

@@ -0,0 +1,36 @@
+const MOCK_EMAIL = 'admin@licitatche.gov.br'
+const MOCK_PASSWORD = 'admin123'
+
+interface AuthUser {
+  nome: string
+  email: string
+  papel: string
+}
+
+export function useAuth() {
+  const user = useState<AuthUser | null>('auth_user', () => null)
+  const token = useCookie('auth_token', { maxAge: 60 * 60 * 8 })
+
+  const isAuthenticated = computed(() => !!token.value)
+
+  if (token.value && !user.value) {
+    user.value = { nome: 'Admin', email: MOCK_EMAIL, papel: 'Administrador' }
+  }
+
+  async function login(email: string, password: string): Promise<{ success: boolean; error?: string }> {
+    if (email === MOCK_EMAIL && password === MOCK_PASSWORD) {
+      token.value = 'mock_token_' + Date.now()
+      user.value = { nome: 'Admin', email, papel: 'Administrador' }
+      return { success: true }
+    }
+    return { success: false, error: 'E-mail ou senha incorretos.' }
+  }
+
+  function logout() {
+    token.value = null
+    user.value = null
+    navigateTo('/login')
+  }
+
+  return { user, isAuthenticated, login, logout }
+}