chore: establish V1.1 recovery baseline

miniapp/pages/activity/activity.wxml

@@ -0,0 +1,43 @@
+<!-- 公益活动列表页 U31 -->
+<view class="act-page">
+  <!-- 顶部区：标题 + 我的活动入口 -->
+  <view class="act-page__topbar">
+    <ui-section-header
+      title="公益活动"
+      subtitle="丹阳本地公益组织主办"
+      action="我的活动"
+      bind:action="onMyActivities"
+    />
+  </view>
+
+  <!-- 首次加载 -->
+  <view wx:if="{{loading && !firstLoaded}}" class="act-loading">
+    <ui-loading mode="skeleton" rows="3" />
+  </view>
+
+  <!-- 列表 -->
+  <view wx:elif="{{activities.length}}" class="act-list">
+    <ui-activity-card
+      wx:for="{{activities}}"
+      wx:key="activityId"
+      activity="{{item}}"
+      bind:tap="onActivityTap"
+    />
+    <!-- 加载更多 -->
+    <view wx:if="{{loadingMore}}" class="act-list__more">
+      <ui-loading mode="spinner" inline text="加载更多活动…" />
+    </view>
+    <view wx:elif="{{!hasMore}}" class="act-list__end">已到底部</view>
+  </view>
+
+  <!-- 空状态 -->
+  <view wx:else class="act-empty">
+    <ui-empty
+      title="{{emptyConfig.title}}"
+      description="{{emptyConfig.description}}"
+      illustration="{{emptyConfig.illustration}}"
+      actions="{{emptyConfig.actions}}"
+      bind:action="onEmptyAction"
+    />
+  </view>
+</view>