first commit

backend/app/models/screenshot.py

@@ -0,0 +1,27 @@
+"""Screenshot model - 截图记录."""
+
+from __future__ import annotations
+from datetime import datetime
+from sqlalchemy import String, DateTime, ForeignKey
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from app.models.database import Base
+
+
+class Screenshot(Base):
+    __tablename__ = "screenshots"
+
+    id: Mapped[int] = mapped_column(primary_key=True, autoincrement=True)
+    case_id: Mapped[int] = mapped_column(ForeignKey("cases.id", ondelete="CASCADE"), index=True)
+    filename: Mapped[str] = mapped_column(String(255))
+    file_path: Mapped[str] = mapped_column(String(512))
+    status: Mapped[str] = mapped_column(String(32), default="pending")  # pending | extracted | failed
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
+
+    case: Mapped["Case"] = relationship("Case", back_populates="screenshots")
+    transactions: Mapped[list["Transaction"]] = relationship(
+        "Transaction", back_populates="screenshot", cascade="all, delete-orphan"
+    )
+
+    def __repr__(self) -> str:
+        return f"<Screenshot(id={self.id}, filename={self.filename})>"