feat: V2-7 Admin 콘솔 리디자인 + 3단계 권한 + SaaS 전환 + 코드 정리

- Admin CRM: D3RO Console 스타일 전체 적용 (panelSx/tableSx/filterBtnSx)
- 3단계 권한: manager/admin/super_admin (DB + Edge Functions + Frontend)
- 랜딩 페이지: 1회 결제 → 월간/연간 구독 SaaS 모델 (10개 언어)
- SSE 스트리밍: VoiceConversation Premium LLM 라우팅 + fallback
- Supabase 클라이언트: packages/api-client 공통 추출 (browser+server)
- RPC 함수 타입: 9개 정의 (admin_usage_by_feature 등)
- callAdminApi 401 버그 수정 (getUser() 선행 토큰 갱신)

site/src/i18n/index.ts

@@ -106,12 +106,17 @@ export interface Translations {
     pro: string
     proPlus: string
     forever: string
-    oneTime: string
+    monthly: string
+    annual: string
+    perMonth: string
     popular: string
+    savePercent: string
     downloadFree: string
     getPro: string
     getProPlus: string
     taxNote: string
+    billingToggleMonthly: string
+    billingToggleAnnual: string
     rows: [PricingFeatureRow, PricingFeatureRow, PricingFeatureRow, PricingFeatureRow, PricingFeatureRow, PricingFeatureRow, PricingFeatureRow, PricingFeatureRow, PricingFeatureRow, PricingFeatureRow, PricingFeatureRow, PricingFeatureRow, PricingFeatureRow, PricingFeatureRow, PricingFeatureRow]
   }
   faq: {