fix(frontend): remove residual post thumbnail lazy path

assets/admin/src/schema/sections/post-list/thumb.js

@@ -7,7 +7,6 @@ export const thumbSchema = {
     thumb_priority: 'featured,attachment,resource,custom',
     thumb_fallback: 'placeholder',
     thumb_spare_images: [],
-    thumb_lazy: true,
     thumb_aspect_ratio: '16:9',
     list_thumb_fit: 'cover',
     thumb_multi_enabled: false,
@@ -63,7 +62,6 @@ export const thumbSchema = {
         { key: 'thumb_multi_enabled', label: '多图卡片', type: 'switch', default: false, help: '当文章有多张图片时，在列表中展示多图预览' },
         { key: 'thumb_multi_count', label: '最多显示几张', type: 'number', default: 3, min: 2, max: 6, dependsOn: { key: 'thumb_multi_enabled', value: true } },
         { key: 'mult_thumb_cat', label: '按分类多图显示', type: 'taxonomy_select', taxonomy: 'category', multiple: true, default: [], help: '选择的分类下所有文章自动显示多张缩略图' },
-        { key: 'thumb_lazy', label: '懒加载', type: 'switch', default: true },
       ],
     },
   ],