fix(community): 修复视频动态刷新后视频消失、点击视频误跳详情

- getPosts 客户端字段映射遗漏 videoUrl/videoCover，onShow 重新拉取后视频被丢弃

- 视频区域与播放器增加 catchtap 阻止冒泡，点击播放不再跳转详情页

- 顺带修正 uploadMediaFile 上方注释块错位

server/tests/community-video.spec.ts

@@ -56,6 +56,12 @@ describe('友圈短视频发布链路', () => {
     expect(detail).toContain('post.videoUrl');
   });
 
+  it('动态列表映射必须保留视频字段，且视频点击不得冒泡跳转详情', () => {
+    expect(api).toContain("videoUrl: p.videoUrl || ''");
+    expect(api).toContain("videoCover: p.videoCover || ''");
+    expect(community).toContain('@click.stop="stopPropagation"');
+  });
+
   it('后台动态管理必须可预览短视频', () => {
     expect(admin).toContain('openVideoPreview');
     expect(admin).toContain('record.videoUrl');