fix: 🧩 活动图片去除黑边

src/views/Activity/ActivityItem.vue

@@ -2,7 +2,7 @@
   <div v-if="showThis" :key="actInfo.id" class="act-item">
     <!-- 图片 -->
     <div class="img-container" @click="clickActItem">
-      <img :style="{ backgroundImage: `url(${getBackGround()})` }" alt="" />
+      <img :src="getBackGround()" alt="" />
       <img v-if="actInfo.fileUrl.length === 0" src="@/assets/images/empty_big.svg" alt="" />
     </div>
     <!-- 标题 -->
@@ -114,9 +114,8 @@ onMounted(() => {
     background: #ebebeb00;
 
     img {
-      width: inherit;
-      height: inherit;
-      background-size: cover;
+      width: 880px;
+      height: 495px;
       border-radius: 16px;
     }
   }