대표 이미지 원본 선택 보강 v1.7.9

server/utils/admin-post-input.js

@@ -1,6 +1,7 @@
 import { z } from 'zod'
 import { ADMIN_POST_PLACEHOLDER_TITLE } from '../../lib/admin-post-title.js'
 import { normalizeMarkdownContent } from '../../lib/markdown-content-normalizer.js'
+import { isPostCardThumbnailUrl } from '../../lib/post-card-thumbnail-url.js'
 import { postStatusSchema } from './content-schema.js'
 
 export const adminPostInputSchema = z.object({
@@ -11,7 +12,11 @@ export const adminPostInputSchema = z.object({
   slug: z.string().trim().min(1).regex(/^[a-z0-9가-힣]+(?:-[a-z0-9가-힣]+)*$/),
   content: z.preprocess(normalizeMarkdownContent, z.string()).default(''),
   excerpt: z.string().default(''),
-  featuredImage: z.string().trim().nullable().default(null),
+  featuredImage: z.string()
+    .trim()
+    .nullable()
+    .default(null)
+    .refine((value) => !isPostCardThumbnailUrl(value), '카드 썸네일은 대표 이미지로 사용할 수 없습니다.'),
   showFeaturedImage: z.boolean().default(false),
   isFeatured: z.boolean().default(false),
   seoTitle: z.string().trim().default(''),