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

apps/desktop/src/renderer/components/CloudSyncSection.tsx

@@ -133,6 +133,17 @@ export function CloudSyncSection(): React.ReactElement {
     }
   }
 
+  async function handlePull(): Promise<void> {
+    setError(null)
+    setBusy(true)
+    setState((prev) => ({ ...prev, syncing: true }))
+    try {
+      await window.electronAPI.cloudSync.pullAll()
+    } finally {
+      // 완료/에러 이벤트로 setBusy(false) 처리됨
+    }
+  }
+
   const lastSyncText = state.lastSyncAt
     ? new Date(state.lastSyncAt).toLocaleString('ko-KR')
     : '없음'
@@ -239,9 +250,16 @@ export function CloudSyncSection(): React.ReactElement {
               disabled={busy || state.syncing}
               startIcon={state.syncing ? <CircularProgress size={16} /> : null}
             >
-              {state.syncing ? '동기화 중...' : 'Sync Now'}
+              {state.syncing ? '동기화 중...' : 'Push'}
             </Button>
-            <Button variant="outlined" onClick={() => void handleSignOut()} disabled={busy}>
+            <Button
+              variant="outlined"
+              onClick={() => void handlePull()}
+              disabled={busy || state.syncing}
+            >
+              Pull
+            </Button>
+            <Button variant="outlined" onClick={() => void handleSignOut()} disabled={busy} color="warning">
               로그아웃
             </Button>
           </Stack>

apps/desktop/src/renderer/components/SettingsModal.tsx

@@ -29,11 +29,13 @@ import KeyboardIcon from '@mui/icons-material/Keyboard'
 import EditIcon from '@mui/icons-material/Edit'
 import MicIcon from '@mui/icons-material/Mic'
 import LockIcon from '@mui/icons-material/Lock'
+import CloudIcon from '@mui/icons-material/Cloud'
 import CheckCircleIcon from '@mui/icons-material/CheckCircle'
 import CancelIcon from '@mui/icons-material/Cancel'
 import { d3roPalette, d3roFontMono, d3roShadow } from '@d3ro/ui/theme'
 import { HotkeyRecordModal } from './HotkeyRecordModal'
 import { LicenseTab } from './LicenseTab'
+import { CloudSyncSection } from './CloudSyncSection'
 import { useI18n, LOCALE_META } from '@d3ro/i18n'
 import type { Locale } from '@d3ro/i18n'
 import type { ThemeMode, AppConfig, HotkeyBinding, AudioDevice } from '@d3ro/core/types'
@@ -372,6 +374,7 @@ export function SettingsModal({ open, onClose }: SettingsModalProps): React.Reac
             <Tab label={t('settings.tabs.stt')} />
             <Tab label={t('settings.tabs.llm')} />
             <Tab label={t('license.nav')} icon={<LockIcon sx={{ fontSize: 14 }} />} iconPosition="start" />
+            <Tab label={t('settings.tabs.cloud') ?? 'Cloud'} icon={<CloudIcon sx={{ fontSize: 14 }} />} iconPosition="start" />
             <Tab label={t('settings.tabs.about')} />
           </Tabs>
           <Box sx={{ p: 3 }}>
@@ -807,8 +810,13 @@ export function SettingsModal({ open, onClose }: SettingsModalProps): React.Reac
             <LicenseTab />
           </TabPanel>
 
-          {/* ── 정보 탭 ──────────────────────────────── */}
+          {/* ── Cloud Sync 탭 ──────────────────────────── */}
           <TabPanel value={activeTab} index={5}>
+            <CloudSyncSection />
+          </TabPanel>
+
+          {/* ── 정보 탭 ──────────────────────────────── */}
+          <TabPanel value={activeTab} index={6}>
             <Box sx={{ display: 'flex', flexDirection: 'column', gap: 2.5 }}>
               <Typography variant="overline" sx={{ color: d3roPalette.text.label, letterSpacing: '1.5px' }}>
                 D3RO-VOICE