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/action-dock/action-dock.less

@@ -0,0 +1,64 @@
+.action-dock {
+  display: flex;
+  justify-content: space-around;
+  align-items: center;
+  padding: 16rpx var(--spacing-lg) calc(16rpx + env(safe-area-inset-bottom));
+  background: rgba(255, 255, 255, 0.95);
+  backdrop-filter: blur(10px);
+  border-top: 1rpx solid var(--border-color);
+  position: fixed;
+  bottom: 0;
+  left: 0;
+  width: 100%;
+  box-sizing: border-box;
+  z-index: 100;
+  box-shadow: 0 -4rpx 16rpx rgba(0, 0, 0, 0.03);
+}
+
+.action-item {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  gap: 6rpx;
+  color: var(--text-secondary);
+  font-size: 20rpx;
+  flex: 1;
+}
+
+.action-btn {
+  margin: 0;
+  padding: 0;
+  border: 0;
+  background: transparent;
+  line-height: inherit;
+  border-radius: 0;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+}
+
+.action-btn::after {
+  border: none;
+}
+
+.icon {
+  width: 48rpx;
+  height: 48rpx;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  font-size: 32rpx;
+  /* Emoji size */
+  margin-bottom: 4rpx;
+  transition: transform 0.1s;
+}
+
+.action-btn:active .icon {
+  transform: scale(0.9);
+}
+
+.action-text {
+  font-size: 20rpx;
+  color: var(--text-secondary);
+}