feat(V2-6차): 테마 토글 + Mermaid + 오디오 재생 + Dashboard 차트

[A] Dark/Light/6종 + Auto 테마 토글
- theme-mode-context.tsx: localStorage 영속 + prefers-color-scheme
- theme-provider.tsx: 컨텍스트 기반 동적 getTheme
- sidebar.tsx: MUI Select 토글 (PaletteIcon)
- 12개 locale theme.* 키 추가 (label/dark/light/auto/nord/solarized/catppuccin/dracula)

[B] DocumentEditor Mermaid + Markdown 렌더
- markdown-preview.tsx: react-markdown + remark-gfm + lazy mermaid
  - mermaid 코드 블록 자동 SVG 렌더
  - dark theme + d3ro 폰트
- document-editor.tsx: Edit/Preview Tabs

[C] 회의 오디오 재생
- meeting-audio-player.tsx: Supabase Storage signed URL (1h) → <audio controls>
- meetings/[id] AUDIO 카드 추가

[D] Dashboard 14일 추이 차트
- meetings-trend-chart.tsx: recharts LineChart (회의/문서)
- dashboard/page.tsx: 14일 데이터 집계 + 이번 주 stat 자동 계산

[W] fix: Emotion key 'd3ro-mui' → 'mui'
- 'd3ro-mui'에 숫자 3이 포함돼 Emotion 키 검증 실패
- dev SSR /login 500 에러 차단했음

deps:
- react-markdown@10, remark-gfm@4, mermaid@11, recharts@3

packages/i18n/src/locales/de.json

@@ -291,5 +291,13 @@
   "settings.hfToken": "HuggingFace Token",
   "settings.hfTokenHint": "Ein HuggingFace Token wird für die Sprechertrennung benötigt",
   "settings.diarization": "Sprechertrennung",
-  "settings.diarizationHint": "Sprecher werden nach der Aufnahme automatisch identifiziert"
-}
+  "settings.diarizationHint": "Sprecher werden nach der Aufnahme automatisch identifiziert",
+  "theme.label": "Design",
+  "theme.dark": "Dunkel",
+  "theme.light": "Hell",
+  "theme.auto": "Auto (System)",
+  "theme.nord": "Nord",
+  "theme.solarized": "Solarized",
+  "theme.catppuccin": "Catppuccin",
+  "theme.dracula": "Dracula"
+}

packages/i18n/src/locales/en.json

@@ -491,5 +491,13 @@
   "settings.hfToken": "HuggingFace Token",
   "settings.hfTokenHint": "A HuggingFace token is required for speaker diarization",
   "settings.diarization": "Speaker Diarization",
-  "settings.diarizationHint": "Automatically identify speakers after recording ends"
-}
+  "settings.diarizationHint": "Automatically identify speakers after recording ends",
+  "theme.label": "Theme",
+  "theme.dark": "Dark",
+  "theme.light": "Light",
+  "theme.auto": "Auto (system)",
+  "theme.nord": "Nord",
+  "theme.solarized": "Solarized",
+  "theme.catppuccin": "Catppuccin",
+  "theme.dracula": "Dracula"
+}

packages/i18n/src/locales/es.json

@@ -291,5 +291,13 @@
   "settings.hfToken": "Token de HuggingFace",
   "settings.hfTokenHint": "Se necesita un token de HuggingFace para identificar hablantes",
   "settings.diarization": "Identificación de hablantes",
-  "settings.diarizationHint": "Identifica automáticamente los hablantes al finalizar la grabación"
-}
+  "settings.diarizationHint": "Identifica automáticamente los hablantes al finalizar la grabación",
+  "theme.label": "Tema",
+  "theme.dark": "Oscuro",
+  "theme.light": "Claro",
+  "theme.auto": "Auto (sistema)",
+  "theme.nord": "Nord",
+  "theme.solarized": "Solarized",
+  "theme.catppuccin": "Catppuccin",
+  "theme.dracula": "Dracula"
+}

packages/i18n/src/locales/fr.json

@@ -291,5 +291,13 @@
   "settings.hfToken": "Token HuggingFace",
   "settings.hfTokenHint": "Un token HuggingFace est requis pour l'identification des locuteurs",
   "settings.diarization": "Identification des locuteurs",
-  "settings.diarizationHint": "Identifier automatiquement les locuteurs après l'enregistrement"
-}
+  "settings.diarizationHint": "Identifier automatiquement les locuteurs après l'enregistrement",
+  "theme.label": "Thème",
+  "theme.dark": "Sombre",
+  "theme.light": "Clair",
+  "theme.auto": "Auto (système)",
+  "theme.nord": "Nord",
+  "theme.solarized": "Solarized",
+  "theme.catppuccin": "Catppuccin",
+  "theme.dracula": "Dracula"
+}

packages/i18n/src/locales/ja.json

@@ -291,5 +291,13 @@
   "settings.hfToken": "HuggingFaceトークン",
   "settings.hfTokenHint": "話者分離にはHuggingFaceトークンが必要です",
   "settings.diarization": "話者分離",
-  "settings.diarizationHint": "録音終了後に自動的に話者を識別します"
-}
+  "settings.diarizationHint": "録音終了後に自動的に話者を識別します",
+  "theme.label": "テーマ",
+  "theme.dark": "ダーク",
+  "theme.light": "ライト",
+  "theme.auto": "自動 (システム)",
+  "theme.nord": "Nord",
+  "theme.solarized": "Solarized",
+  "theme.catppuccin": "Catppuccin",
+  "theme.dracula": "Dracula"
+}

packages/i18n/src/locales/ko.json

@@ -491,5 +491,13 @@
   "settings.hfToken": "HuggingFace 토큰",
   "settings.hfTokenHint": "화자 구분을 위해 HuggingFace 토큰이 필요합니다",
   "settings.diarization": "화자 구분",
-  "settings.diarizationHint": "녹음 종료 후 화자를 자동으로 구분합니다"
-}
+  "settings.diarizationHint": "녹음 종료 후 화자를 자동으로 구분합니다",
+  "theme.label": "테마",
+  "theme.dark": "다크",
+  "theme.light": "라이트",
+  "theme.auto": "자동 (시스템)",
+  "theme.nord": "노드",
+  "theme.solarized": "솔라라이즈드",
+  "theme.catppuccin": "카푸치노",
+  "theme.dracula": "드라큘라"
+}

packages/i18n/src/locales/pt.json

@@ -291,5 +291,13 @@
   "settings.hfToken": "Token do HuggingFace",
   "settings.hfTokenHint": "Um token do HuggingFace é necessário para identificar oradores",
   "settings.diarization": "Identificação de oradores",
-  "settings.diarizationHint": "Identifica automaticamente os oradores após o término da gravação"
-}
+  "settings.diarizationHint": "Identifica automaticamente os oradores após o término da gravação",
+  "theme.label": "Tema",
+  "theme.dark": "Escuro",
+  "theme.light": "Claro",
+  "theme.auto": "Auto (sistema)",
+  "theme.nord": "Nord",
+  "theme.solarized": "Solarized",
+  "theme.catppuccin": "Catppuccin",
+  "theme.dracula": "Dracula"
+}

packages/i18n/src/locales/ru.json

@@ -291,5 +291,13 @@
   "settings.hfToken": "Токен HuggingFace",
   "settings.hfTokenHint": "Токен HuggingFace необходим для определения говорящих",
   "settings.diarization": "Диаризация",
-  "settings.diarizationHint": "Автоматически определять говорящих после завершения записи"
-}
+  "settings.diarizationHint": "Автоматически определять говорящих после завершения записи",
+  "theme.label": "Тема",
+  "theme.dark": "Тёмная",
+  "theme.light": "Светлая",
+  "theme.auto": "Авто (система)",
+  "theme.nord": "Nord",
+  "theme.solarized": "Solarized",
+  "theme.catppuccin": "Catppuccin",
+  "theme.dracula": "Dracula"
+}

packages/i18n/src/locales/th.json

@@ -291,5 +291,13 @@
   "settings.hfToken": "โทเค็น HuggingFace",
   "settings.hfTokenHint": "ต้องใช้โทเค็น HuggingFace สำหรับการแยกผู้พูด",
   "settings.diarization": "การแยกผู้พูด",
-  "settings.diarizationHint": "ระบุผู้พูดโดยอัตโนมัติหลังจากการบันทึกสิ้นสุด"
-}
+  "settings.diarizationHint": "ระบุผู้พูดโดยอัตโนมัติหลังจากการบันทึกสิ้นสุด",
+  "theme.label": "ธีม",
+  "theme.dark": "มืด",
+  "theme.light": "สว่าง",
+  "theme.auto": "อัตโนมัติ (ระบบ)",
+  "theme.nord": "Nord",
+  "theme.solarized": "Solarized",
+  "theme.catppuccin": "Catppuccin",
+  "theme.dracula": "Dracula"
+}

packages/i18n/src/locales/vi.json

@@ -291,5 +291,13 @@
   "settings.hfToken": "Token HuggingFace",
   "settings.hfTokenHint": "Cần token HuggingFace để phân tách người nói",
   "settings.diarization": "Phân tách người nói",
-  "settings.diarizationHint": "Tự động nhận dạng người nói sau khi ghi âm kết thúc"
-}
+  "settings.diarizationHint": "Tự động nhận dạng người nói sau khi ghi âm kết thúc",
+  "theme.label": "Chủ đề",
+  "theme.dark": "Tối",
+  "theme.light": "Sáng",
+  "theme.auto": "Tự động (hệ thống)",
+  "theme.nord": "Nord",
+  "theme.solarized": "Solarized",
+  "theme.catppuccin": "Catppuccin",
+  "theme.dracula": "Dracula"
+}

packages/i18n/src/locales/zh-TW.json

@@ -291,5 +291,13 @@
   "settings.hfToken": "HuggingFace 令牌",
   "settings.hfTokenHint": "說話人分離需要HuggingFace令牌",
   "settings.diarization": "說話人分離",
-  "settings.diarizationHint": "錄音結束後自動識別說話人"
-}
+  "settings.diarizationHint": "錄音結束後自動識別說話人",
+  "theme.label": "主題",
+  "theme.dark": "深色",
+  "theme.light": "淺色",
+  "theme.auto": "自動 (系統)",
+  "theme.nord": "Nord",
+  "theme.solarized": "Solarized",
+  "theme.catppuccin": "Catppuccin",
+  "theme.dracula": "Dracula"
+}

packages/i18n/src/locales/zh.json

@@ -291,5 +291,13 @@
   "settings.hfToken": "HuggingFace令牌",
   "settings.hfTokenHint": "说话人分离需要HuggingFace令牌",
   "settings.diarization": "说话人分离",
-  "settings.diarizationHint": "录音结束后自动识别说话人"
-}
+  "settings.diarizationHint": "录音结束后自动识别说话人",
+  "theme.label": "主题",
+  "theme.dark": "深色",
+  "theme.light": "浅色",
+  "theme.auto": "自动 (系统)",
+  "theme.nord": "Nord",
+  "theme.solarized": "Solarized",
+  "theme.catppuccin": "Catppuccin",
+  "theme.dracula": "Dracula"
+}