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/pages/firm/index.ts

@@ -0,0 +1,71 @@
+import { getFirmProfile } from '../../api/open';
+import type { FirmInfo } from '../../types/card';
+
+function createEmptyFirm(): FirmInfo {
+  return {
+    id: '',
+    name: '',
+    logo: '',
+    intro: '',
+    hotlinePhone: '',
+    hqAddress: '',
+    hqLatitude: 0,
+    hqLongitude: 0,
+    officeCount: 0,
+    lawyerCount: 0,
+    heroImage: '',
+    officeList: [],
+    practiceAreas: [],
+  };
+}
+
+Page({
+  data: {
+    firm: createEmptyFirm(),
+    loading: false,
+  },
+  onLoad() {
+    this.loadFirmProfile();
+  },
+  async loadFirmProfile() {
+    this.setData({ loading: true });
+    try {
+      const firm = await getFirmProfile();
+      this.setData({ firm });
+    } catch (error) {
+      const message = error instanceof Error ? error.message : '加载事务所信息失败';
+      wx.showToast({
+        title: message,
+        icon: 'none',
+      });
+    } finally {
+      this.setData({ loading: false });
+    }
+  },
+  goLawyerList() {
+    wx.navigateTo({
+      url: '/pages/lawyer-list/index',
+    });
+  },
+  openLocation() {
+    const { firm } = this.data;
+    if (!firm.hqLatitude || !firm.hqLongitude) {
+      wx.showToast({
+        title: '暂未配置地图位置',
+        icon: 'none',
+      });
+      return;
+    }
+
+    wx.openLocation({
+      latitude: firm.hqLatitude,
+      longitude: firm.hqLongitude,
+      name: firm.name,
+      address: firm.hqAddress,
+      scale: 18,
+      fail: () => {
+        wx.showToast({ title: '打开地图失败', icon: 'none' });
+      },
+    });
+  },
+});