refactor!: replace Zustand global store with TanStack Query for systemFeatures

Follow-up to SSR prefetch migration (2833965). Eliminates the Zustand
middleman that was syncing TanStack Query data into a separate store.

- Remove useGlobalPublicStore Zustand store entirely
- Create hooks/use-global-public.ts with useSystemFeatures,
  useSystemFeaturesQuery, useIsSystemFeaturesPending, useSetupStatusQuery
- Migrate all 93 consumers to import from @/hooks/use-global-public
- Simplify global-public-context.tsx to a thin provider component
- Update 18 test files to mock the new hook interface
- Fix SetupStatusResponse.setup_at type from Date to string (JSON)
- Fix setup-status.spec.ts mock target to match consoleClient

BREAKING CHANGE: useGlobalPublicStore is removed. Use useSystemFeatures()
from @/hooks/use-global-public instead.

web/app/components/header/license-env/index.tsx

@@ -3,13 +3,13 @@
 import { RiHourglass2Fill } from '@remixicon/react'
 import dayjs from 'dayjs'
 import { useTranslation } from 'react-i18next'
-import { useGlobalPublicStore } from '@/context/global-public-context'
+import { useSystemFeatures } from '@/hooks/use-global-public'
 import { LicenseStatus } from '@/types/feature'
 import PremiumBadge from '../../base/premium-badge'
 
 const LicenseNav = () => {
   const { t } = useTranslation()
-  const { systemFeatures } = useGlobalPublicStore()
+  const systemFeatures = useSystemFeatures()
 
   if (systemFeatures.license?.status === LicenseStatus.EXPIRING) {
     const expiredAt = systemFeatures.license?.expired_at