#399

frontend/src/components/posts/import/PostImportRowForm.tsx

@@ -52,7 +52,7 @@ const buildResetDraft = (row: PostImportRow): Draft => ({
     parentPostIds: String (row.resetSnapshot.attributes.parentPostIds ?? '') })
 
 const groupedMessages = (...values: (string[] | undefined)[]): string[] =>
-    values.flatMap (value => value ?? [])
+    [...new Set (values.flatMap (value => value ?? []))]
 
 const sameDraft = (left:  Draft, right: Draft): boolean =>
     left.url === right.url

frontend/src/components/posts/import/PostImportRowSummary.tsx

@@ -1,5 +1,5 @@
 import { Button } from '@/components/ui/button'
-import { cn } from '@/lib/utils'
+import { cn, originalCreatedAtString } from '@/lib/utils'
 
 import PostImportStatusBadge from '@/components/posts/import/PostImportStatusBadge'
 import ThumbnailPreview from '@/components/posts/import/ThumbnailPreview'
@@ -19,9 +19,9 @@ const summaryWarning = (row: PostImportRow): string | null =>
     ?? null
 
 const summaryDate = (row: PostImportRow): string =>
-    [row.attributes.originalCreatedFrom, row.attributes.originalCreatedBefore]
-	.filter (_1 => typeof _1 === 'string' && _1 !== '')
-	.join (' ～ ')
+    originalCreatedAtString (
+	row.attributes.originalCreatedFrom?.toString () ?? null,
+	row.attributes.originalCreatedBefore?.toString () ?? null)
 
 
 const PostImportRowSummary: FC<Props> = ({ row, onEdit }) => {
@@ -52,7 +52,7 @@ const PostImportRowSummary: FC<Props> = ({ row, onEdit }) => {
               {String (row.attributes.tags ?? '') || 'タグなし'}
             </div>
             <div className="text-xs text-neutral-500 dark:text-neutral-400">
-              {summaryDate (row) || '日時未取得'}
+              {summaryDate (row)}
               {row.attributes.duration ? ` / ${ row.attributes.duration }` : ''}
             </div>
             {warning && (