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/AxiosTransformStream.js

@@ -0,0 +1,156 @@
+'use strict';
+
+import stream from 'stream';
+import utils from '../utils.js';
+
+const kInternals = Symbol('internals');
+
+class AxiosTransformStream extends stream.Transform {
+  constructor(options) {
+    options = utils.toFlatObject(
+      options,
+      {
+        maxRate: 0,
+        chunkSize: 64 * 1024,
+        minChunkSize: 100,
+        timeWindow: 500,
+        ticksRate: 2,
+        samplesCount: 15,
+      },
+      null,
+      (prop, source) => {
+        return !utils.isUndefined(source[prop]);
+      }
+    );
+
+    super({
+      readableHighWaterMark: options.chunkSize,
+    });
+
+    const internals = (this[kInternals] = {
+      timeWindow: options.timeWindow,
+      chunkSize: options.chunkSize,
+      maxRate: options.maxRate,
+      minChunkSize: options.minChunkSize,
+      bytesSeen: 0,
+      isCaptured: false,
+      notifiedBytesLoaded: 0,
+      ts: Date.now(),
+      bytes: 0,
+      onReadCallback: null,
+    });
+
+    this.on('newListener', (event) => {
+      if (event === 'progress') {
+        if (!internals.isCaptured) {
+          internals.isCaptured = true;
+        }
+      }
+    });
+  }
+
+  _read(size) {
+    const internals = this[kInternals];
+
+    if (internals.onReadCallback) {
+      internals.onReadCallback();
+    }
+
+    return super._read(size);
+  }
+
+  _transform(chunk, encoding, callback) {
+    const internals = this[kInternals];
+    const maxRate = internals.maxRate;
+
+    const readableHighWaterMark = this.readableHighWaterMark;
+
+    const timeWindow = internals.timeWindow;
+
+    const divider = 1000 / timeWindow;
+    const bytesThreshold = maxRate / divider;
+    const minChunkSize =
+      internals.minChunkSize !== false
+        ? Math.max(internals.minChunkSize, bytesThreshold * 0.01)
+        : 0;
+
+    const pushChunk = (_chunk, _callback) => {
+      const bytes = Buffer.byteLength(_chunk);
+      internals.bytesSeen += bytes;
+      internals.bytes += bytes;
+
+      internals.isCaptured && this.emit('progress', internals.bytesSeen);
+
+      if (this.push(_chunk)) {
+        process.nextTick(_callback);
+      } else {
+        internals.onReadCallback = () => {
+          internals.onReadCallback = null;
+          process.nextTick(_callback);
+        };
+      }
+    };
+
+    const transformChunk = (_chunk, _callback) => {
+      const chunkSize = Buffer.byteLength(_chunk);
+      let chunkRemainder = null;
+      let maxChunkSize = readableHighWaterMark;
+      let bytesLeft;
+      let passed = 0;
+
+      if (maxRate) {
+        const now = Date.now();
+
+        if (!internals.ts || (passed = now - internals.ts) >= timeWindow) {
+          internals.ts = now;
+          bytesLeft = bytesThreshold - internals.bytes;
+          internals.bytes = bytesLeft < 0 ? -bytesLeft : 0;
+          passed = 0;
+        }
+
+        bytesLeft = bytesThreshold - internals.bytes;
+      }
+
+      if (maxRate) {
+        if (bytesLeft <= 0) {
+          // next time window
+          return setTimeout(() => {
+            _callback(null, _chunk);
+          }, timeWindow - passed);
+        }
+
+        if (bytesLeft < maxChunkSize) {
+          maxChunkSize = bytesLeft;
+        }
+      }
+
+      if (maxChunkSize && chunkSize > maxChunkSize && chunkSize - maxChunkSize > minChunkSize) {
+        chunkRemainder = _chunk.subarray(maxChunkSize);
+        _chunk = _chunk.subarray(0, maxChunkSize);
+      }
+
+      pushChunk(
+        _chunk,
+        chunkRemainder
+          ? () => {
+              process.nextTick(_callback, null, chunkRemainder);
+            }
+          : _callback
+      );
+    };
+
+    transformChunk(chunk, function transformNextChunk(err, _chunk) {
+      if (err) {
+        return callback(err);
+      }
+
+      if (_chunk) {
+        transformChunk(_chunk, transformNextChunk);
+      } else {
+        callback(null);
+      }
+    });
+  }
+}
+
+export default AxiosTransformStream;