feat(V2-X-b): UI 정리 + pull 동기화 + Stripe 서명 검증 + ui-native 패키지

묶음 A — UI 정리 + i18n 완성:
[A1] desktop SettingsModal에 CloudSyncSection 통합 (탭 6번째)
  - CloudIcon import, settings.tabs.cloud 키 추가
  - 기존 about 탭은 index 5 -> 6

[A2] apps/web Sidebar 공유 layout 리팩터링
  - app/(app)/layout.tsx 신규 (route group)
  - dashboard/meetings/record/teams/billing을 (app)/ 아래로 git mv
  - app/(app)/layout.tsx에 auth 가드 + Sidebar 통합
  - 기존 개별 page.tsx에서 Sidebar/auth 중복 제거
  - app/(app)/dashboard/layout.tsx 제거 (루트 layout이 처리)

[A3] 11개 locale에 V2 새 키 추가 (en/ja/zh/zh-TW/es/fr/de/pt/ru/vi/th)
  - nav.meetings/record/teams/billing/logout
  - login.subtitle/google/github/terms
  - settings.tabs.cloud

묶음 B — V2-4b pull 동기화:
- CloudSyncService.pullAll() 신규
  - history/dictionary 테이블 원격에서 fetch
  - last_sync_at 이후 updated_at만 필터
  - Last-Write-Wins 충돌 해결 (remote.updated_at > local.updated_at)
  - 로컬에 없는 행은 INSERT, 있는 행은 UPDATE (구체적 컬럼 지정)
- IPC CLOUD_SYNC.PULL_ALL 채널 + handler + preload api
- CloudSyncSection에 Pull 버튼 추가 (Push 옆에 위치)

묶음 C — V2-8b Stripe webhook 서명 검증:
- stripe-webhook Edge Function에 Web Crypto API 기반 HMAC-SHA256 검증
  - Stripe-Signature 헤더 파싱 (t=, v1= 엔트리)
  - Replay 방지 (timestamp tolerance 300초)
  - constantTimeEqual로 타이밍 공격 방지
  - crypto.subtle.importKey/sign으로 HMAC 계산
- stripe-portal Edge Function 신규 (Customer Portal)
  - JWT 인증 -> 기존 customer_id 조회 -> billing_portal/sessions 생성
  - return_url 지원
- apps/web/components/billing/portal-button.tsx (구독 관리 버튼)
- billing 페이지에 Free 외 tier 사용자에게 PortalButton 표시
- config.toml에 stripe-portal 함수 등록 (verify_jwt=true)

묶음 D — V2-6b packages/ui-native:
- @d3ro/ui-native 신규 패키지 (React Native 전용 DS)
  - theme.ts: d3roNativePalette/Typo/Radius (MUI 없는 정적 값)
  - components/MetalCard.tsx: View + 섀시 섀도우
  - components/PhosphorText.tsx: Text + 앰버 glow (textShadow)
  - components/Led.tsx: View 원 + glow
  - components/PhysicalButton.tsx: Pressable + 누름 느낌
- React/React-Native는 peerDependencies
- apps/mobile/package.json에 @d3ro/ui-native를 file: 의존성으로 추가
  (mobile은 npm workspace 제외이므로 file path 필요)

검증:
- desktop typecheck OK
- web typecheck OK
- web next build OK (11 라우트, (app) 그룹 반영)
- 회귀 없음

packages/i18n/src/locales/th.json

@@ -6,6 +6,15 @@
   "nav.dictionary": "พจนานุกรม",
   "nav.commands": "คำสั่ง",
   "nav.settings": "การตั้งค่า",
+  "nav.meetings": "การประชุม",
+  "nav.record": "บันทึกเสียง",
+  "nav.teams": "ทีม",
+  "nav.billing": "การเรียกเก็บเงิน",
+  "nav.logout": "ออกจากระบบ",
+  "login.subtitle": "ผู้ช่วย AI สำหรับเสียง",
+  "login.google": "ดำเนินการต่อด้วย Google",
+  "login.github": "ดำเนินการต่อด้วย GitHub",
+  "login.terms": "การดำเนินการต่อ ถือว่าคุณยอมรับข้อกำหนดในการให้บริการและนโยบายความเป็นส่วนตัว",
   "dashboard.sessionOverview": "ภาพรวมเซสชัน",
   "dashboard.systemStatus": "สถานะระบบ",
   "dashboard.sessionsToday": "เซสชันวันนี้",
@@ -62,6 +71,7 @@
   "settings.tabs.audio": "เสียง",
   "settings.tabs.stt": "STT",
   "settings.tabs.llm": "LLM",
+  "settings.tabs.cloud": "คลาวด์",
   "settings.tabs.about": "เกี่ยวกับ",
   "settings.shortcuts": "ปุ่มลัด",
   "settings.dictation": "การบอกเล่า",
@@ -279,4 +289,4 @@
   "settings.hfTokenHint": "ต้องใช้โทเค็น HuggingFace สำหรับการแยกผู้พูด",
   "settings.diarization": "การแยกผู้พูด",
   "settings.diarizationHint": "ระบุผู้พูดโดยอัตโนมัติหลังจากการบันทึกสิ้นสุด"
-}
+}