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/sanitizeHeaderValue.js

@@ -0,0 +1,60 @@
+'use strict';
+
+import utils from '../utils.js';
+
+function trimSPorHTAB(str) {
+  let start = 0;
+  let end = str.length;
+
+  while (start < end) {
+    const code = str.charCodeAt(start);
+
+    if (code !== 0x09 && code !== 0x20) {
+      break;
+    }
+
+    start += 1;
+  }
+
+  while (end > start) {
+    const code = str.charCodeAt(end - 1);
+
+    if (code !== 0x09 && code !== 0x20) {
+      break;
+    }
+
+    end -= 1;
+  }
+
+  return start === 0 && end === str.length ? str : str.slice(start, end);
+}
+
+// The control-code ranges are intentional: header sanitization strips C0/DEL bytes.
+// eslint-disable-next-line no-control-regex
+const INVALID_UNICODE_HEADER_VALUE_CHARS = new RegExp('[\\u0000-\\u0008\\u000a-\\u001f\\u007f]+', 'g');
+// eslint-disable-next-line no-control-regex
+const INVALID_BYTE_STRING_HEADER_VALUE_CHARS = new RegExp('[^\\u0009\\u0020-\\u007e\\u0080-\\u00ff]+', 'g');
+
+function sanitizeValue(value, invalidChars) {
+  if (utils.isArray(value)) {
+    return value.map((item) => sanitizeValue(item, invalidChars));
+  }
+
+  return trimSPorHTAB(String(value).replace(invalidChars, ''));
+}
+
+export const sanitizeHeaderValue = (value) =>
+  sanitizeValue(value, INVALID_UNICODE_HEADER_VALUE_CHARS);
+
+export const sanitizeByteStringHeaderValue = (value) =>
+  sanitizeValue(value, INVALID_BYTE_STRING_HEADER_VALUE_CHARS);
+
+export function toByteStringHeaderObject(headers) {
+  const byteStringHeaders = Object.create(null);
+
+  utils.forEach(headers.toJSON(), (value, header) => {
+    byteStringHeaders[header] = sanitizeByteStringHeaderValue(value);
+  });
+
+  return byteStringHeaders;
+}