feat: add API client and auth store

frontend/src/api.ts

@@ -0,0 +1,57 @@
+import axios from 'axios'
+
+const api = axios.create({
+  baseURL: '/api',
+  withCredentials: true,
+})
+
+api.interceptors.response.use(
+  (res) => res,
+  (err) => {
+    if (err.response?.status === 401 && window.location.pathname !== '/login') {
+      window.location.href = '/login'
+    }
+    return Promise.reject(err)
+  }
+)
+
+export default api
+
+// --- Auth ---
+export const authApi = {
+  login: (username: string, password: string) =>
+    api.post('/auth/login', { username, password }),
+  logout: () => api.post('/auth/logout'),
+  me: () => api.get('/auth/me'),
+  register: (username: string, email: string, password: string) =>
+    api.post('/auth/register', { username, email, password }),
+}
+
+// --- Configs ---
+export const configsApi = {
+  list: () => api.get('/configs'),
+  create: (data: object) => api.post('/configs', data),
+  get: (id: number) => api.get(`/configs/${id}`),
+  update: (id: number, data: object) => api.put(`/configs/${id}`, data),
+  delete: (id: number) => api.delete(`/configs/${id}`),
+  generate: (id: number, format: 'json' | 'zip' = 'json') =>
+    api.post(`/configs/${id}/generate?format=${format}`, null, {
+      responseType: format === 'zip' ? 'blob' : 'json',
+    }),
+}
+
+// --- Nested resources (zones, interfaces, policies, rules, masq) ---
+const nestedApi = (resource: string) => ({
+  list: (configId: number) => api.get(`/configs/${configId}/${resource}`),
+  create: (configId: number, data: object) => api.post(`/configs/${configId}/${resource}`, data),
+  update: (configId: number, id: number, data: object) =>
+    api.put(`/configs/${configId}/${resource}/${id}`, data),
+  delete: (configId: number, id: number) =>
+    api.delete(`/configs/${configId}/${resource}/${id}`),
+})
+
+export const zonesApi = nestedApi('zones')
+export const interfacesApi = nestedApi('interfaces')
+export const policiesApi = nestedApi('policies')
+export const rulesApi = nestedApi('rules')
+export const masqApi = nestedApi('masq')