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/empty-state/empty-state.json

@@ -0,0 +1,3 @@
+{
+  "component": true
+}

frontend_miniprogram/miniprogram/components/empty-state/empty-state.less

@@ -0,0 +1,25 @@
+.empty-wrap {
+  padding: 140rpx 40rpx;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+}
+
+.empty-icon {
+  width: 80rpx;
+  height: 80rpx;
+  border-radius: 24rpx;
+  background: var(--bg-surface);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  font-size: 36rpx;
+  margin-bottom: var(--spacing-md);
+  color: var(--text-tertiary);
+}
+
+.empty-text {
+  font-size: 26rpx;
+  color: var(--text-secondary);
+}

frontend_miniprogram/miniprogram/components/empty-state/empty-state.ts

@@ -0,0 +1,8 @@
+Component({
+  properties: {
+    text: {
+      type: String,
+      value: '暂无数据',
+    },
+  },
+});

frontend_miniprogram/miniprogram/components/empty-state/empty-state.wxml

@@ -0,0 +1,4 @@
+<view class="empty-wrap">
+  <text class="empty-icon">∅</text>
+  <text class="empty-text">{{text}}</text>
+</view>