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/gp.py

@@ -0,0 +1,56 @@
+from datetime import datetime, date
+from decimal import Decimal
+from sqlalchemy import String, DateTime, Date, ForeignKey, Numeric, Text, JSON
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+from database import Base
+
+
+class RevenueEntry(Base):
+    """Daily revenue entries for GP calculation"""
+    __tablename__ = "revenue_entries"
+
+    id: Mapped[int] = mapped_column(primary_key=True, index=True)
+    kitchen_id: Mapped[int] = mapped_column(ForeignKey("kitchens.id"), nullable=False)
+
+    date: Mapped[date] = mapped_column(Date, nullable=False)
+    amount: Mapped[Decimal] = mapped_column(Numeric(10, 2), nullable=False)
+
+    # Category breakdown (e.g., "food", "beverages", "other")
+    category: Mapped[str] = mapped_column(String(50), default="total")
+
+    notes: Mapped[str] = mapped_column(Text, nullable=True)
+
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+
+    # Relationships
+    kitchen: Mapped["Kitchen"] = relationship("Kitchen", back_populates="revenue_entries")
+
+
+class GPPeriod(Base):
+    """Calculated GP for a specific period"""
+    __tablename__ = "gp_periods"
+
+    id: Mapped[int] = mapped_column(primary_key=True, index=True)
+    kitchen_id: Mapped[int] = mapped_column(ForeignKey("kitchens.id"), nullable=False)
+
+    start_date: Mapped[date] = mapped_column(Date, nullable=False)
+    end_date: Mapped[date] = mapped_column(Date, nullable=False)
+
+    # Calculated values
+    total_revenue: Mapped[Decimal] = mapped_column(Numeric(12, 2), nullable=False)
+    total_costs: Mapped[Decimal] = mapped_column(Numeric(12, 2), nullable=False)
+    gp_amount: Mapped[Decimal] = mapped_column(Numeric(12, 2), nullable=False)
+    gp_percentage: Mapped[Decimal] = mapped_column(Numeric(5, 2), nullable=False)
+
+    # Breakdown by category (JSON)
+    # {"food": {"revenue": 1000, "cost": 300, "gp": 70}, ...}
+    category_breakdown: Mapped[dict | None] = mapped_column(JSON, default=dict)
+
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+
+    # Relationships
+    kitchen: Mapped["Kitchen"] = relationship("Kitchen", back_populates="gp_periods")
+
+
+# Forward reference
+from .user import Kitchen