feat: 搭建微信小程序展示端

- 初始化小程序工程配置与类型声明

- 增加首页、律所、律师列表、详情与历史页面

- 补充公共组件、运行时配置与示例素材

frontend_miniprogram/miniprogram/utils/http.ts

@@ -0,0 +1,75 @@
+import { API_BASE_URL_OVERRIDE_KEY, tenantRuntimeConfig } from '../config/runtime';
+import { getMiniappAppId, getMiniappEnvVersion } from './miniapp';
+
+interface ApiResponse<T> {
+  code: string;
+  message: string;
+  data: T;
+}
+
+interface RequestOptions {
+  url: string;
+  method?: 'GET' | 'POST';
+  data?: WechatMiniprogram.IAnyObject;
+}
+
+function normalizeBaseUrl(baseUrl: string): string {
+  return baseUrl.trim().replace(/\/+$/, '');
+}
+
+function getApiBaseUrl(): string {
+  const override = wx.getStorageSync(API_BASE_URL_OVERRIDE_KEY);
+  if (typeof override === 'string' && override.trim()) {
+    return normalizeBaseUrl(override);
+  }
+
+  const envVersion = getMiniappEnvVersion();
+  const baseUrl = tenantRuntimeConfig.apiBaseUrlByEnv[envVersion];
+  if (!baseUrl || !baseUrl.trim()) {
+    throw new Error(`未配置 ${envVersion} 环境的接口域名`);
+  }
+
+  const normalizedBaseUrl = normalizeBaseUrl(baseUrl);
+  if (envVersion !== 'develop' && !normalizedBaseUrl.startsWith('https://')) {
+    throw new Error(`${envVersion} 环境接口域名必须使用 HTTPS`);
+  }
+
+  return normalizedBaseUrl;
+}
+
+export function request<T>(options: RequestOptions): Promise<T> {
+  const appId = getMiniappAppId();
+  if (!appId) {
+    return Promise.reject(new Error('未获取到小程序 AppID'));
+  }
+
+  let apiBaseUrl = '';
+  try {
+    apiBaseUrl = getApiBaseUrl();
+  } catch (error) {
+    return Promise.reject(error instanceof Error ? error : new Error('接口域名配置无效'));
+  }
+
+  return new Promise((resolve, reject) => {
+    wx.request({
+      url: `${apiBaseUrl}${options.url}`,
+      method: options.method || 'GET',
+      data: options.data,
+      header: {
+        'X-Miniapp-Appid': appId,
+      },
+      success: (response) => {
+        const payload = response.data as ApiResponse<T> | undefined;
+        if (response.statusCode >= 200 && response.statusCode < 300 && payload && payload.code === '0') {
+          resolve(payload.data);
+          return;
+        }
+        const message = payload && payload.message ? payload.message : '请求失败';
+        reject(new Error(message));
+      },
+      fail: () => {
+        reject(new Error('网络异常，请稍后重试'));
+      },
+    });
+  });
+}