fix and update

apps/frontend/lib/document-catalog.ts

@@ -290,9 +290,34 @@ export function parseDocumentPhotos(metadata: Record<string, unknown>): string[]
   return [];
 }
 
-export function withDocumentPhotos(metadata: Record<string, unknown>, photoStorageKeys: string[]) {
+export type DocumentAttachmentMeta = {
+  fileName?: string;
+  contentType?: string;
+};
+
+export function parseAttachmentMeta(metadata: Record<string, unknown>): Record<string, DocumentAttachmentMeta> {
+  const raw = metadata.attachmentMeta;
+  if (!raw || typeof raw !== 'object' || Array.isArray(raw)) {
+    return {};
+  }
+  const result: Record<string, DocumentAttachmentMeta> = {};
+  for (const [key, value] of Object.entries(raw as Record<string, unknown>)) {
+    if (!value || typeof value !== 'object' || Array.isArray(value)) continue;
+    const entry = value as Record<string, unknown>;
+    result[key] = {
+      fileName: typeof entry.fileName === 'string' ? entry.fileName : undefined,
+      contentType: typeof entry.contentType === 'string' ? entry.contentType : undefined
+    };
+  }
+  return result;
+}
+
+export function withDocumentPhotos(metadata: Record<string, unknown>, photoStorageKeys: string[], attachmentMeta?: Record<string, DocumentAttachmentMeta>) {
   const next: Record<string, unknown> = { ...metadata, photoStorageKeys };
   delete next.photoStorageKey;
+  if (attachmentMeta && Object.keys(attachmentMeta).length > 0) {
+    next.attachmentMeta = attachmentMeta;
+  }
   return next;
 }