feat(short-drama-agent-front): 优化项目查询与工作区界面

src/features/subject-images/SubjectImagesPage.vue

@@ -701,6 +701,7 @@ const rules = { concurrency: integerRule('批量并发'), limit: integerRule('
                         :src="coverImage(form)?.imageUrl"
                         :alt="`${form.subject.name} · ${form.name}`"
                         :object-fit="layout === 'masonry' ? 'contain' : 'cover'"
+                        :class="{ 'form-image-empty': !coverImage(form) }"
                         preview
                         :empty-text="hasRunningImages(form.images) ? '后台正在生成图片' : '尚未生成图片'"
                     />
@@ -842,6 +843,10 @@ const rules = { concurrency: integerRule('批量并发'), limit: integerRule('
 .form-image-masonry .asset-image {
     @apply aspect-auto;
 }
+/* 无图占位保持正方形，避免瀑布流的自适应比例将占位区域压扁。 */
+.form-image-grid .asset-image.form-image-empty {
+    @apply aspect-square;
+}
 .form-image-masonry .asset-image .n-image,
 .form-image-masonry .asset-image .n-image img {
     @apply h-auto;