refactor(core): keep plan prices, cloud quotas and public URLs in one contract (WS-A)

Prices, quotas and site URLs were copied by hand into the edge functions,
admin, desktop and the landing site, and the copies disagreed (Payple billed
9,900/29,900 KRW, admin labels said 12,900/24,900 KRW and $9.9/$19.9, the
site said 2,900/8,900 KRW).

- packages/core/src/plan-catalog.ts is the single source for PLAN_PRICE_KRW
  (Free 0 / Pro 2,900 / Pro+ 8,900 a month) and PLAN_QUOTA.
- packages/core/src/web-urls.ts is the single source for the public origin,
  the /app web-app base path, SITE_URLS and billingUrl().
- Deno cannot bundle packages/core, so scripts/ci/sync-core-contract.mjs
  generates _shared/core-contract.generated.ts; `npm run contract:check`
  fails on drift (same pattern as version:sync).
- Payple checkout, renewal and webhook amount checks now bill the catalog
  price, so existing subscribers move to the new price at their next renewal.
  quota.ts, team-contract.ts and the tests read the generated values.
- Admin MRR/ARR is computed in KRW from the catalog; license labels, the
  release link and desktop PREMIUM_LLM limits derive from core; the site
  imports prices and quotas directly.

Policy: docs/REFACTOR_POLICY.md Wave 3, W3-1 and W3-2.

apps/admin/src/components/license-issuer-dialog.tsx

@@ -20,9 +20,12 @@ import {
   Alert
 } from '@mui/material'
 import type { LicenseTier } from '@d3ro/core/types'
+import { PLAN_PRICE_KRW } from '@d3ro/core/plan-catalog'
 import { d3roPalette, d3roFontMono, d3roRadius } from '@d3ro/ui/theme'
 import { C, FONT_SANS, FONT_MONO, primaryButtonSx } from '@/lib/console-theme'
 
+const krw = new Intl.NumberFormat('ko-KR', { style: 'currency', currency: 'KRW', maximumFractionDigits: 0 })
+
 interface LicenseIssuerDialogProps {
   open: boolean
   onClose: () => void
@@ -150,9 +153,9 @@ export function LicenseIssuerDialog({ open, onClose }: LicenseIssuerDialogProps)
           <FormControl fullWidth sx={inputSx}>
             <InputLabel>Plan / Tier</InputLabel>
             <Select value={tier} onChange={(e) => setTier(e.target.value as LicenseTier)} label="Plan / Tier">
-              <MenuItem value="pro">Pro ($9.9 / ₩12,900)</MenuItem>
-              <MenuItem value="pro_plus">Pro+ ($19.9 / ₩24,900)</MenuItem>
-              <MenuItem value="team">Team ($25 / ₩32,000)</MenuItem>
+              <MenuItem value="pro">Pro ({krw.format(PLAN_PRICE_KRW.pro)} / month)</MenuItem>
+              <MenuItem value="pro_plus">Pro+ ({krw.format(PLAN_PRICE_KRW.pro_plus)} / month)</MenuItem>
+              <MenuItem value="team">Team</MenuItem>
               <MenuItem value="enterprise">Enterprise (Custom)</MenuItem>
             </Select>
           </FormControl>