feat(T06): Verkaufsmodul + Rechtsdokumente + DATEV-Export + Sales UI

backend/app/models/datev_export.py

@@ -0,0 +1,50 @@
+"""SQLAlchemy model for DATEV export records."""
+
+import uuid
+from datetime import date, datetime
+from decimal import Decimal
+
+from sqlalchemy import Date, DateTime, Numeric, String, func
+from sqlalchemy.dialects.postgresql import UUID
+from sqlalchemy.orm import Mapped, mapped_column
+
+from app.database import Base
+
+
+class DATEVExport(Base):
+    """DATEV export record tracking CSV exports for accounting."""
+
+    __tablename__ = "datev_exports"
+
+    id: Mapped[uuid.UUID] = mapped_column(
+        UUID(as_uuid=True),
+        primary_key=True,
+        default=uuid.uuid4,
+    )
+    start_date: Mapped[date] = mapped_column(Date, nullable=False)
+    end_date: Mapped[date] = mapped_column(Date, nullable=False)
+    file_path: Mapped[str | None] = mapped_column(
+        String(500), nullable=True
+    )
+    total_amount: Mapped[Decimal] = mapped_column(
+        Numeric(14, 2), nullable=False, default=0
+    )
+    created_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), nullable=False, server_default=func.now()
+    )
+
+    def __repr__(self) -> str:
+        return f"<DATEVExport id={self.id} start={self.start_date} end={self.end_date}>"
+
+    def to_dict(self) -> dict:
+        """Serialize DATEV export for API responses."""
+        return {
+            "id": str(self.id),
+            "start_date": self.start_date.isoformat() if self.start_date else None,
+            "end_date": self.end_date.isoformat() if self.end_date else None,
+            "file_path": self.file_path,
+            "total_amount": (
+                float(self.total_amount) if self.total_amount is not None else None
+            ),
+            "created_at": self.created_at.isoformat() if self.created_at else None,
+        }