cursor done.

public/js/api.js

@@ -0,0 +1,66 @@
+export class ApiError extends Error {
+  constructor(message, status) {
+    super(message);
+    this.name = 'ApiError';
+    this.status = status;
+  }
+}
+
+async function request(server, path, { method = 'GET', body, token } = {}) {
+  try {
+    const headers = { 'Content-Type': 'application/json' };
+    if (token) {
+      headers.Authorization = `Bearer ${token}`;
+    }
+
+    const response = await fetch(`${server}${path}`, {
+      method,
+      headers,
+      body: body ? JSON.stringify(body) : undefined
+    });
+
+    const data = await response.json().catch(() => ({}));
+
+    if (!response.ok || data.success === false) {
+      const message = data.error || data.message || response.statusText;
+      throw new ApiError(message, response.status);
+    }
+
+    return data;
+  } catch (error) {
+    if (error instanceof ApiError) {
+      throw error;
+    }
+    throw new ApiError('无法连接到服务器，请确认服务已启动', 0);
+  }
+}
+
+export async function register(server, username, password) {
+  return request(server, '/api/auth/register', {
+    method: 'POST',
+    body: { username, password }
+  });
+}
+
+export async function login(server, username, password) {
+  return request(server, '/api/auth/login', {
+    method: 'POST',
+    body: { username, password }
+  });
+}
+
+export async function fetchCurrentUser(server, token) {
+  return request(server, '/api/auth/me', { token });
+}
+
+export async function fetchCalendar(server, token) {
+  return request(server, '/api/calendar', { token });
+}
+
+export async function saveCalendar(server, token, markedDates) {
+  return request(server, '/api/calendar', {
+    method: 'POST',
+    token,
+    body: { markedDates }
+  });
+}