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/components/lawyer-card/lawyer-card.wxml

@@ -0,0 +1,21 @@
+<view class="lawyer-card" bindtap="handleTap">
+  <image class="avatar" src="{{lawyer.avatar}}" mode="aspectFill"></image>
+  
+  <view class="content">
+    <view class="header-row">
+      <text class="name">{{lawyer.name}}</text>
+      <text class="title">{{lawyer.title}}</text>
+    </view>
+    
+    <text wx:if="{{showOffice}}" class="office">{{lawyer.office}}</text>
+    
+    <view class="tags-row">
+      <text class="tag" wx:for="{{specialties}}" wx:key="*this" wx:if="{{index < 3}}">{{item}}</text>
+      <text class="tag-more" wx:if="{{specialties.length > 3}}">...</text>
+    </view>
+  </view>
+
+  <view class="action-col">
+    <text class="consult-btn">咨询</text>
+  </view>
+</view>