fix: /simplify 리뷰 — UX/코드 품질 10건 수정

- EditableSegment: readOnly prop 추가, hover 배경색 효과
- MeetingDetailTabs: useMemo(parseSegments), 이중 debounce 제거, cleanup
- MeetingChatPanel: sessionId deps, 에러 표시, key=timestamp
- ExportMenu: i18n 위반 수정 (하드코딩 → t())
- MeetingModePage: 에러 Snackbar 피드백 (startRecording, viewDetail)
- TranscriptTab: polish 실패 피드백
- 12개 locale i18n 키 5개 추가

src/renderer/components/meeting/EditableSegment.tsx

@@ -12,6 +12,7 @@ interface EditableSegmentProps {
   text: string
   edited: boolean     // 수정 여부
   onEdit: (segmentId: string, newText: string) => void
+  readOnly?: boolean
 }
 
 function formatTimestamp(ms: number): string {
@@ -27,6 +28,7 @@ export function EditableSegment({
   text,
   edited,
   onEdit,
+  readOnly = false,
 }: EditableSegmentProps): React.ReactElement {
   const { t } = useI18n()
   const [editing, setEditing] = useState(false)
@@ -34,9 +36,10 @@ export function EditableSegment({
   const inputRef = useRef<HTMLInputElement>(null)
 
   const handleClick = useCallback(() => {
+    if (readOnly) return
     setDraft(text)
     setEditing(true)
-  }, [text])
+  }, [readOnly, text])
 
   const handleCommit = useCallback(() => {
     const trimmed = draft.trim()
@@ -104,12 +107,17 @@ export function EditableSegment({
         fontFamily: d3roFontMono,
         fontSize: 13,
         color: d3roPalette.text.primary,
-        cursor: 'text',
+        cursor: readOnly ? 'default' : 'text',
         borderBottom: edited ? `1px dashed ${d3roPalette.text.inactive}` : 'none',
-        '&:hover': {
+        borderRadius: '2px',
-          color: d3roPalette.text.primary,
+        px: readOnly ? 0 : '2px',
-          borderBottomColor: edited ? d3roPalette.accent.amber : undefined,
+        '&:hover': readOnly
-        },
+          ? {}
+          : {
+              color: d3roPalette.text.primary,
+              borderBottomColor: edited ? d3roPalette.accent.amber : undefined,
+              bgcolor: edited ? undefined : d3roPalette.bg.elevated,
+            },
       }}
     >
       {text}

src/renderer/components/meeting/ExportMenu.tsx

@@ -41,9 +41,9 @@ export function ExportMenu({ onExport, onCopyToClipboard }: ExportMenuProps): Re
   )
 
   const formats: FormatItem[] = [
-    { format: 'md', label: 'Markdown (.md)' },
+    { format: 'md', label: t('meeting.exportMd') },
     { format: 'txt', label: t('meeting.exportTxt') },
-    { format: 'pdf', label: 'PDF (.pdf)' },
+    { format: 'pdf', label: t('meeting.exportPdfFmt') },
     { format: 'docx', label: t('meeting.exportDocx') },
   ]
 

src/renderer/components/meeting/MeetingChatPanel.tsx

@@ -52,6 +52,7 @@ export function MeetingChatPanel({ sessionId }: MeetingChatPanelProps): React.Re
   const [streaming, setStreaming] = useState(false)
   const [streamingContent, setStreamingContent] = useState('')
   const [collapsed, setCollapsed] = useState(false)
+  const [error, setError] = useState<string | null>(null)
   const scrollRef = useRef<HTMLDivElement>(null)
   const inputRef = useRef<HTMLInputElement>(null)
 
@@ -79,9 +80,10 @@ export function MeetingChatPanel({ sessionId }: MeetingChatPanelProps): React.Re
       setStreamingContent('')
     })
 
-    const unsubError = window.electronAPI.meetingChat.onError((_err) => {
+    const unsubError = window.electronAPI.meetingChat.onError((err) => {
       setStreaming(false)
       setStreamingContent('')
+      setError(err.message)
     })
 
     return () => {
@@ -89,7 +91,7 @@ export function MeetingChatPanel({ sessionId }: MeetingChatPanelProps): React.Re
       unsubMessage()
       unsubError()
     }
-  }, [])
+  }, [sessionId])
 
   const handleSend = useCallback(() => {
     const text = inputValue.trim()
@@ -197,9 +199,9 @@ export function MeetingChatPanel({ sessionId }: MeetingChatPanelProps): React.Re
               minHeight: 0,
             }}
           >
-            {messages.map((msg, idx) => (
+            {messages.map((msg) => (
               <Box
-                key={idx}
+                key={`${msg.role}-${msg.timestamp}`}
                 sx={{
                   display: 'flex',
                   justifyContent: msg.role === 'user' ? 'flex-end' : 'flex-start',
@@ -233,6 +235,32 @@ export function MeetingChatPanel({ sessionId }: MeetingChatPanelProps): React.Re
               </Box>
             ))}
 
+            {/* 에러 메시지 */}
+            {error && (
+              <Box sx={{ display: 'flex', justifyContent: 'flex-start' }}>
+                <Box
+                  sx={{
+                    maxWidth: '80%',
+                    px: 1.25,
+                    py: 0.5,
+                    borderRadius: '6px',
+                    fontFamily: d3roFontMono,
+                    fontSize: d3roTypo.compact.size,
+                    lineHeight: 1.5,
+                    bgcolor: d3roPalette.bg.elevated,
+                    color: d3roPalette.tag.red,
+                    border: `1px solid ${d3roPalette.tag.red}`,
+                    wordBreak: 'break-word',
+                    whiteSpace: 'pre-wrap',
+                    cursor: 'pointer',
+                  }}
+                  onClick={() => setError(null)}
+                >
+                  {error}
+                </Box>
+              </Box>
+            )}
+
             {/* 스트리밍 중 어시스턴트 메시지 */}
             {streaming && (
               <Box sx={{ display: 'flex', justifyContent: 'flex-start' }}>

src/renderer/components/meeting/MeetingDetailTabs.tsx

@@ -1,7 +1,7 @@
 // src/renderer/components/meeting/MeetingDetailTabs.tsx
 // Phase 14.5: 풀스크린 탭 전환 컨테이너 — 전사 + 동적 문서 탭
 
-import { useState, useEffect, useCallback, useRef } from 'react'
+import { useState, useEffect, useCallback, useMemo } from 'react'
 import {
   Box,
   Tabs,
@@ -33,8 +33,6 @@ interface MeetingDetailTabsProps {
   onBack: () => void
 }
 
-const AUTOSAVE_DELAY = 500
-
 // 세그먼트 파싱: rawTranscript를 줄 단위로 분리
 function parseSegments(
   rawTranscript: string | null,
@@ -78,17 +76,19 @@ 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 ?? []).filter(Boolean))
   const [templates, setTemplates] = useState<MeetingDocTemplate[]>([])
   const [tabIndex, setTabIndex] = useState(0)
   const [dialogOpen, setDialogOpen] = useState(false)
   const [generating, setGenerating] = useState(false)
   const [editingTitle, setEditingTitle] = useState(false)
   const [titleDraft, setTitleDraft] = useState(detail.title ?? '')
-  const autoSaveTimers = useRef<Record<string, ReturnType<typeof setTimeout>>>({})
 
   // 세그먼트 파싱 (rawTranscript 기반)
-  const segments = parseSegments(detail.rawTranscript, detail.editedTranscript)
+  const segments = useMemo(
+    () => parseSegments(detail.rawTranscript, detail.editedTranscript),
+    [detail.rawTranscript, detail.editedTranscript],
+  )
 
   // 템플릿 로드
   useEffect(() => {
@@ -134,19 +134,16 @@ export function MeetingDetailTabs({
     [detail.id],
   )
 
-  // ── 문서 내용 자동저장 ──
+  // ── 문서 내용 자동저장 (DocumentTab 내부에 debounce 있음, 이중 래핑 제거) ──
   const handleDocContentChange = useCallback(
-    (docId: string, content: string) => {
+    async (docId: string, content: string) => {
-      if (autoSaveTimers.current[docId]) clearTimeout(autoSaveTimers.current[docId])
+      await window.electronAPI.meetingMode.updateDocument({
-      autoSaveTimers.current[docId] = setTimeout(async () => {
+        documentId: docId,
-        await window.electronAPI.meetingMode.updateDocument({
+        content,
-          documentId: docId,
+      })
-          content,
+      setDocuments((prev) =>
-        })
+        prev.map((d) => (d.id === docId ? { ...d, content } : d)),
-        setDocuments((prev) =>
+      )
-          prev.map((d) => (d.id === docId ? { ...d, content } : d)),
-        )
-      }, AUTOSAVE_DELAY)
     },
     [],
   )
@@ -286,8 +283,8 @@ export function MeetingDetailTabs({
           }}
         >
           <Tab label={t('meeting.transcriptTab')} />
-          {documents.map((doc) => (
+          {documents.filter(Boolean).map((doc) => (
-            <Tab key={doc.id} label={doc.title} />
+            <Tab key={doc.id} label={doc.title ?? t('meeting.untitled')} />
           ))}
           <Tab
             icon={<AddIcon sx={{ fontSize: 16 }} />}

src/renderer/components/meeting/TranscriptTab.tsx

@@ -2,7 +2,7 @@
 // Phase 14.5: 전사 편집 탭 (상세 페이지용)
 
 import { useState, useCallback } from 'react'
-import { Box, Switch, FormControlLabel, LinearProgress } from '@mui/material'
+import { Box, Switch, FormControlLabel, LinearProgress, Snackbar, Alert } from '@mui/material'
 import { EditableSegment } from './EditableSegment'
 import { PhysicalButton } from '../ds/PhysicalButton'
 import { PhosphorText } from '../ds/PhosphorText'
@@ -37,15 +37,19 @@ export function TranscriptTab({
   const { t } = useI18n()
   const [showEdited, setShowEdited] = useState(true)
   const [polishing, setPolishing] = useState(false)
+  const [polishError, setPolishError] = useState<string | null>(null)
 
   const handlePolish = useCallback(async () => {
     setPolishing(true)
+    setPolishError(null)
     const resp = await window.electronAPI.meetingMode.polishTranscript({ sessionId })
     if (resp.success) {
       onSaveTranscript(resp.data)
+    } else {
+      setPolishError(t('meeting.polishFailed'))
     }
     setPolishing(false)
-  }, [sessionId, onSaveTranscript])
+  }, [sessionId, onSaveTranscript, t])
 
   const handleDownloadTxt = useCallback(() => {
     const content = showEdited && editedTranscript ? editedTranscript : (rawTranscript ?? '')
@@ -77,6 +81,16 @@ export function TranscriptTab({
 
   return (
     <Box sx={{ display: 'flex', flexDirection: 'column', height: '100%' }}>
+      <Snackbar
+        open={polishError !== null}
+        autoHideDuration={4000}
+        onClose={() => setPolishError(null)}
+        anchorOrigin={{ vertical: 'bottom', horizontal: 'center' }}
+      >
+        <Alert severity="error" onClose={() => setPolishError(null)} sx={{ width: '100%' }}>
+          {polishError}
+        </Alert>
+      </Snackbar>
       {/* 상단 컨트롤 */}
       <Box sx={{ display: 'flex', alignItems: 'center', justifyContent: 'space-between', mb: 1.5 }}>
         <FormControlLabel

src/renderer/i18n/de.json

@@ -265,5 +265,10 @@
   "meeting.copyToClipboard": "In Zwischenablage kopieren",
   "meeting.copied": "Kopiert",
   "meeting.chatCollapse": "Chat einklappen",
-  "meeting.chatExpand": "Chat ausklappen"
+  "meeting.chatExpand": "Chat ausklappen",
+  "meeting.exportMd": "Markdown (.md)",
+  "meeting.exportPdfFmt": "PDF (.pdf)",
+  "meeting.polishFailed": "KI-Polierung fehlgeschlagen",
+  "meeting.viewDetailError": "Meeting-Details konnten nicht geladen werden",
+  "meeting.startRecordingError": "Aufnahme konnte nicht gestartet werden"
 }

src/renderer/i18n/en.json

@@ -466,5 +466,10 @@
   "meeting.copyToClipboard": "Copy to Clipboard",
   "meeting.copied": "Copied",
   "meeting.chatCollapse": "Collapse Chat",
-  "meeting.chatExpand": "Expand Chat"
+  "meeting.chatExpand": "Expand Chat",
+  "meeting.exportMd": "Markdown (.md)",
+  "meeting.exportPdfFmt": "PDF (.pdf)",
+  "meeting.polishFailed": "AI polishing failed",
+  "meeting.viewDetailError": "Failed to load meeting details",
+  "meeting.startRecordingError": "Failed to start recording"
 }

src/renderer/i18n/es.json

@@ -265,5 +265,10 @@
   "meeting.copyToClipboard": "Copiar al portapapeles",
   "meeting.copied": "Copiado",
   "meeting.chatCollapse": "Contraer chat",
-  "meeting.chatExpand": "Expandir chat"
+  "meeting.chatExpand": "Expandir chat",
+  "meeting.exportMd": "Markdown (.md)",
+  "meeting.exportPdfFmt": "PDF (.pdf)",
+  "meeting.polishFailed": "Error al pulir con IA",
+  "meeting.viewDetailError": "Error al cargar detalles de la reunión",
+  "meeting.startRecordingError": "Error al iniciar la grabación"
 }

src/renderer/i18n/fr.json

@@ -265,5 +265,10 @@
   "meeting.copyToClipboard": "Copier dans le presse-papiers",
   "meeting.copied": "Copié",
   "meeting.chatCollapse": "Réduire le chat",
-  "meeting.chatExpand": "Agrandir le chat"
+  "meeting.chatExpand": "Agrandir le chat",
+  "meeting.exportMd": "Markdown (.md)",
+  "meeting.exportPdfFmt": "PDF (.pdf)",
+  "meeting.polishFailed": "Echec du polish IA",
+  "meeting.viewDetailError": "Impossible de charger les détails de la réunion",
+  "meeting.startRecordingError": "Impossible de démarrer l'enregistrement"
 }

src/renderer/i18n/ja.json

@@ -265,5 +265,10 @@
   "meeting.copyToClipboard": "クリップボードにコピー",
   "meeting.copied": "コピーしました",
   "meeting.chatCollapse": "チャットを折り畳む",
-  "meeting.chatExpand": "チャットを展開"
+  "meeting.chatExpand": "チャットを展開",
+  "meeting.exportMd": "Markdown (.md)",
+  "meeting.exportPdfFmt": "PDF (.pdf)",
+  "meeting.polishFailed": "AI磨き上げに失敗しました",
+  "meeting.viewDetailError": "会議の詳細を読み込めませんでした",
+  "meeting.startRecordingError": "録音を開始できませんでした"
 }

src/renderer/i18n/ko.json

@@ -466,5 +466,10 @@
   "meeting.copyToClipboard": "클립보드 복사",
   "meeting.copied": "복사됨",
   "meeting.chatCollapse": "채팅 접기",
-  "meeting.chatExpand": "채팅 펼치기"
+  "meeting.chatExpand": "채팅 펼치기",
+  "meeting.exportMd": "Markdown (.md)",
+  "meeting.exportPdfFmt": "PDF (.pdf)",
+  "meeting.polishFailed": "AI 다듬기에 실패했습니다",
+  "meeting.viewDetailError": "회의 상세 정보를 불러오지 못했습니다",
+  "meeting.startRecordingError": "녹음을 시작하지 못했습니다"
 }

src/renderer/i18n/pt.json

@@ -265,5 +265,10 @@
   "meeting.copyToClipboard": "Copiar para área de transferência",
   "meeting.copied": "Copiado",
   "meeting.chatCollapse": "Recolher chat",
-  "meeting.chatExpand": "Expandir chat"
+  "meeting.chatExpand": "Expandir chat",
+  "meeting.exportMd": "Markdown (.md)",
+  "meeting.exportPdfFmt": "PDF (.pdf)",
+  "meeting.polishFailed": "Falha no polimento de IA",
+  "meeting.viewDetailError": "Falha ao carregar detalhes da reunião",
+  "meeting.startRecordingError": "Falha ao iniciar gravação"
 }

src/renderer/i18n/ru.json

@@ -265,5 +265,10 @@
   "meeting.copyToClipboard": "Копировать в буфер обмена",
   "meeting.copied": "Скопировано",
   "meeting.chatCollapse": "Свернуть чат",
-  "meeting.chatExpand": "Развернуть чат"
+  "meeting.chatExpand": "Развернуть чат",
+  "meeting.exportMd": "Markdown (.md)",
+  "meeting.exportPdfFmt": "PDF (.pdf)",
+  "meeting.polishFailed": "Ошибка ИИ-полировки",
+  "meeting.viewDetailError": "Не удалось загрузить детали встречи",
+  "meeting.startRecordingError": "Не удалось начать запись"
 }

src/renderer/i18n/th.json

@@ -265,5 +265,10 @@
   "meeting.copyToClipboard": "คัดลอกไปยังคลิปบอร์ด",
   "meeting.copied": "คัดลอกแล้ว",
   "meeting.chatCollapse": "ยุบแชท",
-  "meeting.chatExpand": "ขยายแชท"
+  "meeting.chatExpand": "ขยายแชท",
+  "meeting.exportMd": "Markdown (.md)",
+  "meeting.exportPdfFmt": "PDF (.pdf)",
+  "meeting.polishFailed": "AI ปรับแต่งล้มเหลว",
+  "meeting.viewDetailError": "ไม่สามารถโหลดรายละเอียดการประชุมได้",
+  "meeting.startRecordingError": "ไม่สามารถเริ่มการบันทึกได้"
 }

src/renderer/i18n/vi.json

@@ -265,5 +265,10 @@
   "meeting.copyToClipboard": "Sao chép vào bộ nhớ tạm",
   "meeting.copied": "Đã sao chép",
   "meeting.chatCollapse": "Thu gọn chat",
-  "meeting.chatExpand": "Mở rộng chat"
+  "meeting.chatExpand": "Mở rộng chat",
+  "meeting.exportMd": "Markdown (.md)",
+  "meeting.exportPdfFmt": "PDF (.pdf)",
+  "meeting.polishFailed": "AI đánh bóng thất bại",
+  "meeting.viewDetailError": "Không thể tải chi tiết cuộc họp",
+  "meeting.startRecordingError": "Không thể bắt đầu ghi âm"
 }

src/renderer/i18n/zh-TW.json

@@ -265,5 +265,10 @@
   "meeting.copyToClipboard": "複製到剪貼簿",
   "meeting.copied": "已複製",
   "meeting.chatCollapse": "收起聊天",
-  "meeting.chatExpand": "展開聊天"
+  "meeting.chatExpand": "展開聊天",
+  "meeting.exportMd": "Markdown (.md)",
+  "meeting.exportPdfFmt": "PDF (.pdf)",
+  "meeting.polishFailed": "AI潤色失敗",
+  "meeting.viewDetailError": "無法載入會議詳情",
+  "meeting.startRecordingError": "無法開始錄音"
 }

src/renderer/i18n/zh.json

@@ -265,5 +265,10 @@
   "meeting.copyToClipboard": "复制到剪贴板",
   "meeting.copied": "已复制",
   "meeting.chatCollapse": "收起聊天",
-  "meeting.chatExpand": "展开聊天"
+  "meeting.chatExpand": "展开聊天",
+  "meeting.exportMd": "Markdown (.md)",
+  "meeting.exportPdfFmt": "PDF (.pdf)",
+  "meeting.polishFailed": "AI润色失败",
+  "meeting.viewDetailError": "无法加载会议详情",
+  "meeting.startRecordingError": "无法开始录音"
 }

src/renderer/pages/MeetingModePage.tsx

@@ -6,6 +6,8 @@ import {
   Box,
   LinearProgress,
   TextField,
+  Snackbar,
+  Alert,
 } from '@mui/material'
 import AddIcon from '@mui/icons-material/Add'
 import StopIcon from '@mui/icons-material/Stop'
@@ -50,6 +52,7 @@ export function MeetingModePage(): React.ReactElement {
 
   // 상세 뷰 상태
   const [detail, setDetail] = useState<MeetingSessionDetail | null>(null)
+  const [snackbarMsg, setSnackbarMsg] = useState<string | null>(null)
 
   // ── 세션 목록 로드 ──
   const loadSessions = useCallback(async () => {
@@ -140,8 +143,10 @@ export function MeetingModePage(): React.ReactElement {
       setElapsedMs(0)
       setProgress(null)
       setView('recording')
+    } else {
+      setSnackbarMsg(t('meeting.startRecordingError'))
     }
-  }, [])
+  }, [t])
 
   const handleStopRecording = useCallback(async () => {
     await window.electronAPI.meetingMode.stopRecording()
@@ -171,8 +176,10 @@ export function MeetingModePage(): React.ReactElement {
     if (resp.success) {
       setDetail(resp.data)
       setView('detail')
+    } else {
+      setSnackbarMsg(t('meeting.viewDetailError'))
     }
-  }, [])
+  }, [t])
 
 
   // ── 유틸 ──
@@ -198,6 +205,19 @@ export function MeetingModePage(): React.ReactElement {
     }
   }
 
+  const snackbar = (
+    <Snackbar
+      open={snackbarMsg !== null}
+      autoHideDuration={4000}
+      onClose={() => setSnackbarMsg(null)}
+      anchorOrigin={{ vertical: 'bottom', horizontal: 'center' }}
+    >
+      <Alert severity="error" onClose={() => setSnackbarMsg(null)} sx={{ width: '100%' }}>
+        {snackbarMsg}
+      </Alert>
+    </Snackbar>
+  )
+
   // ── 렌더: 목록 뷰 ──
   if (view === 'list') {
     return (
@@ -263,6 +283,7 @@ export function MeetingModePage(): React.ReactElement {
             ))}
           </Box>
         )}
+        {snackbar}
       </Box>
     )
   }
@@ -328,7 +349,8 @@ export function MeetingModePage(): React.ReactElement {
                   timestamp={Math.max(0, seg.timestamp - (recordingStartRef.current || seg.timestamp))}
                   text={seg.text}
                   edited={false}
-                  onEdit={() => { /* 녹음 중 편집 비활성 */ }}
+                  onEdit={() => { /* no-op: readOnly=true */ }}
+                  readOnly
                 />
               ))}
             </Box>
@@ -403,6 +425,7 @@ export function MeetingModePage(): React.ReactElement {
             </PhosphorText>
           </Box>
         )}
+        {snackbar}
       </Box>
     )
   }