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>

backend/migrations/add_supplier_po_fields.py

@@ -0,0 +1,40 @@
+"""
+Migration: Add order_email and account_number columns to suppliers table.
+Used for Purchase Order email sending and supplier identification.
+"""
+import asyncio
+from sqlalchemy import text
+from database import engine
+
+
+async def migrate():
+    async with engine.begin() as conn:
+        # Add order_email column
+        try:
+            await conn.execute(text(
+                "ALTER TABLE suppliers ADD COLUMN order_email VARCHAR(255)"
+            ))
+            print("+ Added order_email column to suppliers")
+        except Exception as e:
+            if "already exists" in str(e).lower() or "duplicate column" in str(e).lower():
+                print("- order_email column already exists, skipping")
+            else:
+                raise
+
+        # Add account_number column
+        try:
+            await conn.execute(text(
+                "ALTER TABLE suppliers ADD COLUMN account_number VARCHAR(100)"
+            ))
+            print("+ Added account_number column to suppliers")
+        except Exception as e:
+            if "already exists" in str(e).lower() or "duplicate column" in str(e).lower():
+                print("- account_number column already exists, skipping")
+            else:
+                raise
+
+
+if __name__ == "__main__":
+    print("Running migration: add_supplier_po_fields")
+    asyncio.run(migrate())
+    print("Migration complete!")