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/models/line_item.py

@@ -0,0 +1,69 @@
+from datetime import datetime
+from decimal import Decimal
+from sqlalchemy import String, DateTime, ForeignKey, Numeric, Integer, Text, Boolean
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+from database import Base
+
+
+class LineItem(Base):
+    __tablename__ = "line_items"
+
+    id: Mapped[int] = mapped_column(primary_key=True, index=True)
+    invoice_id: Mapped[int] = mapped_column(
+        ForeignKey("invoices.id", ondelete="CASCADE"),
+        nullable=False,
+        index=True
+    )
+
+    # Core fields from Azure extraction
+    product_code: Mapped[str] = mapped_column(String(100), nullable=True)
+    description: Mapped[str] = mapped_column(Text, nullable=True)
+    description_alt: Mapped[str] = mapped_column(Text, nullable=True)  # Alternative description (Azure content vs value mismatch)
+    unit: Mapped[str] = mapped_column(String(50), nullable=True)  # Unit of measure (UN, Box, KG, etc.)
+    quantity: Mapped[Decimal] = mapped_column(Numeric(10, 3), nullable=True)  # Delivered quantity
+    order_quantity: Mapped[Decimal] = mapped_column(Numeric(10, 3), nullable=True)  # Ordered quantity
+    unit_price: Mapped[Decimal] = mapped_column(Numeric(10, 2), nullable=True)
+    tax_rate: Mapped[str] = mapped_column(String(50), nullable=True)  # VAT rate (ZERO, 20.00, No VAT, etc.)
+    tax_amount: Mapped[Decimal] = mapped_column(Numeric(10, 2), nullable=True)  # VAT amount
+    amount: Mapped[Decimal] = mapped_column(Numeric(10, 2), nullable=True)  # Net line total
+
+    # Ordering for display
+    line_number: Mapped[int] = mapped_column(Integer, default=0)
+
+    # Non-stock flag (excluded from GP calculations)
+    is_non_stock: Mapped[bool] = mapped_column(Boolean, default=False)
+
+    # Raw OCR content for this line item (used for pack size parsing)
+    raw_content: Mapped[str] = mapped_column(Text, nullable=True)
+
+    # Pack size fields (parsed from raw_content or manually edited)
+    pack_quantity: Mapped[int] = mapped_column(Integer, nullable=True)  # e.g., 120 for "120x15g"
+    unit_size: Mapped[Decimal] = mapped_column(Numeric(10, 3), nullable=True)  # e.g., 15 for "120x15g"
+    unit_size_type: Mapped[str] = mapped_column(String(10), nullable=True)  # e.g., "g", "kg", "ml", "ltr"
+    portions_per_unit: Mapped[int] = mapped_column(Integer, nullable=True)  # User-editable servings per unit (null = not defined)
+
+    # Calculated cost fields
+    cost_per_item: Mapped[Decimal] = mapped_column(Numeric(10, 4), nullable=True)  # unit_price / pack_quantity
+    cost_per_portion: Mapped[Decimal] = mapped_column(Numeric(10, 4), nullable=True)  # unit_price / (pack_quantity * portions_per_unit)
+
+    # OCR warnings (e.g., "quantity capped from 11112121115 to 999999")
+    ocr_warnings: Mapped[str] = mapped_column(Text, nullable=True)
+
+    # Ingredient mapping (set when user maps line item to ingredient via modal)
+    ingredient_id: Mapped[int | None] = mapped_column(
+        ForeignKey("ingredients.id", ondelete="SET NULL"),
+        nullable=True,
+        index=True
+    )
+
+    # Timestamps
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+    updated_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+
+    # Relationships
+    invoice: Mapped["Invoice"] = relationship("Invoice", back_populates="line_items")
+    ingredient: Mapped["Ingredient | None"] = relationship("Ingredient", foreign_keys=[ingredient_id])
+
+
+from .invoice import Invoice
+from .ingredient import Ingredient