复用项目卡片预览组件

项目卡片预览改为复用 PlatformMediaFrame

删除项目页局部预览框比例和图片填充样式

更新 TRACKING 记录媒体预览组件收口

src/index.css

@@ -3067,18 +3067,8 @@ html[data-mobile-keyboard-open='true'] .platform-mobile-bottom-dock {
 }
 
 .project-gallery__preview {
-  position: relative;
-  display: grid;
-  aspect-ratio: 4 / 3;
-  overflow: hidden;
-  place-items: center;
-  background: #f3f5f8;
-}
-
-.project-gallery__preview img {
-  width: 100%;
-  height: 100%;
-  object-fit: cover;
+  border: 0;
+  border-radius: 0;
 }
 
 .project-gallery__preview-empty {