Initial kitchen scaffold — Phase 1 kitchen port (build-verified 2026-07-11)

FastAPI backend (Python 3.11, MSSQL ODBC for SambaPOS, Azure DI OCR),
kitchen_db on central PG. React/TS/Vite frontend with navy sidebar layout.

Backend: auth.py (APP_SLUG=kitchen, SimpleNamespace — archive routes use
.kitchen_id/.is_admin without modification), main.py (51 migrations, scheduler,
internal router for KDS bookings feed), api/internal.py, full archive API
(31 routers: invoices, recipes, menus, sambapos, resos, newbook, disputes,
purchase_orders, etc.), models, migrations, OCR pipeline.
kitchen_id pinned to 1 (B1 — single hotel).

Frontend: AuthGate (app=kitchen, token shim for archive compat — B5b pending),
Layout (navy sidebar, 6 sections, Lucide icons, teal --app-primary),
App.tsx (Outlet pattern, UploadApp outside Layout), index.css (full :root block).
strict: false — archive components have type issues; build clean.

Note: 45 archive components call fetch('/api/...') without /kitchen/ prefix
(B5b). Runtime 404s; deferred until after initial testing.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/node_modules/@tanstack/react-query/src/usePrefetchQuery.tsx

@@ -0,0 +1,19 @@
+import { useQueryClient } from './QueryClientProvider'
+import type { DefaultError, QueryClient, QueryKey } from '@tanstack/query-core'
+import type { UsePrefetchQueryOptions } from './types'
+
+export function usePrefetchQuery<
+  TQueryFnData = unknown,
+  TError = DefaultError,
+  TData = TQueryFnData,
+  TQueryKey extends QueryKey = QueryKey,
+>(
+  options: UsePrefetchQueryOptions<TQueryFnData, TError, TData, TQueryKey>,
+  queryClient?: QueryClient,
+) {
+  const client = useQueryClient(queryClient)
+
+  if (!client.getQueryState(options.queryKey)) {
+    client.prefetchQuery(options)
+  }
+}