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/axios/lib/helpers/composeSignals.js

@@ -0,0 +1,57 @@
+import CanceledError from '../cancel/CanceledError.js';
+import AxiosError from '../core/AxiosError.js';
+import utils from '../utils.js';
+
+const composeSignals = (signals, timeout) => {
+  signals = signals ? signals.filter(Boolean) : [];
+
+  if (!timeout && !signals.length) {
+    return;
+  }
+
+  const controller = new AbortController();
+
+  let aborted = false;
+
+  const onabort = function (reason) {
+    if (!aborted) {
+      aborted = true;
+      unsubscribe();
+      const err = reason instanceof Error ? reason : this.reason;
+      controller.abort(
+        err instanceof AxiosError
+          ? err
+          : new CanceledError(err instanceof Error ? err.message : err)
+      );
+    }
+  };
+
+  let timer =
+    timeout &&
+    setTimeout(() => {
+      timer = null;
+      onabort(new AxiosError(`timeout of ${timeout}ms exceeded`, AxiosError.ETIMEDOUT));
+    }, timeout);
+
+  const unsubscribe = () => {
+    if (!signals) { return; }
+    timer && clearTimeout(timer);
+    timer = null;
+    signals.forEach((signal) => {
+      signal.unsubscribe
+        ? signal.unsubscribe(onabort)
+        : signal.removeEventListener('abort', onabort);
+    });
+    signals = null;
+  };
+
+  signals.forEach((signal) => signal.addEventListener('abort', onabort, { once: true }));
+
+  const { signal } = controller;
+
+  signal.unsubscribe = () => utils.asap(unsubscribe);
+
+  return signal;
+};
+
+export default composeSignals;