fix: 문서 생성 시 메모 참조 누락 + documents 배열 undefined 방어

generateDocument 프롬프트에 참석자 메모(📝) 포함.
MeetingDetailTabs에서 documents ?? [] 폴백 추가.

src/renderer/components/meeting/MeetingDetailTabs.tsx

@@ -78,7 +78,7 @@ export function MeetingDetailTabs({
 }: MeetingDetailTabsProps): React.ReactElement {
   const { t } = useI18n()
   const [detail, setDetail] = useState<MeetingSessionDetail>(initialDetail)
-  const [documents, setDocuments] = useState<MeetingDocument[]>(initialDetail.documents)
+  const [documents, setDocuments] = useState<MeetingDocument[]>(initialDetail.documents ?? [])
   const [templates, setTemplates] = useState<MeetingDocTemplate[]>([])
   const [tabIndex, setTabIndex] = useState(0)
   const [dialogOpen, setDialogOpen] = useState(false)