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_purchase_orders.py

@@ -0,0 +1,87 @@
+"""
+Migration: Create purchase_orders and purchase_order_line_items tables.
+"""
+import asyncio
+from sqlalchemy import text
+from database import engine
+
+
+async def migrate():
+    async with engine.begin() as conn:
+        # Create purchase_orders table
+        try:
+            await conn.execute(text("""
+                CREATE TABLE IF NOT EXISTS purchase_orders (
+                    id SERIAL PRIMARY KEY,
+                    kitchen_id INTEGER NOT NULL REFERENCES kitchens(id),
+                    supplier_id INTEGER NOT NULL REFERENCES suppliers(id),
+                    order_date DATE NOT NULL,
+                    order_type VARCHAR(20) NOT NULL,
+                    status VARCHAR(20) NOT NULL DEFAULT 'DRAFT',
+                    total_amount NUMERIC(12,2),
+                    order_reference VARCHAR(200),
+                    notes TEXT,
+                    attachment_path VARCHAR(500),
+                    attachment_original_name VARCHAR(255),
+                    linked_invoice_id INTEGER REFERENCES invoices(id) ON DELETE SET NULL,
+                    created_by INTEGER NOT NULL REFERENCES users(id),
+                    created_at TIMESTAMP DEFAULT NOW(),
+                    updated_by INTEGER REFERENCES users(id),
+                    updated_at TIMESTAMP DEFAULT NOW()
+                )
+            """))
+            print("+ Created purchase_orders table")
+        except Exception as e:
+            if "already exists" in str(e).lower():
+                print("- purchase_orders table already exists, skipping")
+            else:
+                raise
+
+        # Create indexes for purchase_orders
+        for idx_name, idx_cols in [
+            ("idx_po_kitchen_date", "kitchen_id, order_date"),
+            ("idx_po_kitchen_supplier", "kitchen_id, supplier_id"),
+            ("idx_po_kitchen_status", "kitchen_id, status"),
+        ]:
+            try:
+                await conn.execute(text(
+                    f"CREATE INDEX IF NOT EXISTS {idx_name} ON purchase_orders({idx_cols})"
+                ))
+                print(f"+ Created index {idx_name}")
+            except Exception as e:
+                if "already exists" in str(e).lower():
+                    print(f"- Index {idx_name} already exists, skipping")
+                else:
+                    raise
+
+        # Create purchase_order_line_items table
+        try:
+            await conn.execute(text("""
+                CREATE TABLE IF NOT EXISTS purchase_order_line_items (
+                    id SERIAL PRIMARY KEY,
+                    purchase_order_id INTEGER NOT NULL REFERENCES purchase_orders(id) ON DELETE CASCADE,
+                    kitchen_id INTEGER NOT NULL REFERENCES kitchens(id),
+                    product_id INTEGER,
+                    product_code VARCHAR(100),
+                    description VARCHAR(500) NOT NULL,
+                    unit VARCHAR(50),
+                    unit_price NUMERIC(12,4) NOT NULL,
+                    quantity NUMERIC(10,3) NOT NULL,
+                    total NUMERIC(12,2) NOT NULL,
+                    line_number INTEGER DEFAULT 0,
+                    source VARCHAR(20) DEFAULT 'manual',
+                    created_at TIMESTAMP DEFAULT NOW()
+                )
+            """))
+            print("+ Created purchase_order_line_items table")
+        except Exception as e:
+            if "already exists" in str(e).lower():
+                print("- purchase_order_line_items table already exists, skipping")
+            else:
+                raise
+
+
+if __name__ == "__main__":
+    print("Running migration: add_purchase_orders")
+    asyncio.run(migrate())
+    print("Migration complete!")