first commit

backend/app/schemas/transaction.py

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+from datetime import datetime
+from uuid import UUID
+
+from pydantic import BaseModel
+
+from app.models.evidence_image import SourceApp
+from app.models.transaction import Direction
+
+
+class TransactionOut(BaseModel):
+    id: UUID
+    case_id: UUID
+    source_app: SourceApp
+    trade_time: datetime
+    amount: float
+    direction: Direction
+    counterparty_name: str
+    counterparty_account: str
+    self_account_tail_no: str
+    order_no: str
+    remark: str
+    evidence_image_id: UUID | None = None
+    confidence: float
+    cluster_id: UUID | None = None
+    is_duplicate: bool
+    is_transit: bool
+
+    model_config = {"from_attributes": True}
+
+
+class TransactionListOut(BaseModel):
+    items: list[TransactionOut]
+    total: int
+
+
+class FlowNodeOut(BaseModel):
+    id: str
+    label: str
+    type: str
+
+
+class FlowEdgeOut(BaseModel):
+    source: str
+    target: str
+    amount: float
+    count: int
+    trade_time: str
+
+
+class FlowGraphOut(BaseModel):
+    nodes: list[FlowNodeOut]
+    edges: list[FlowEdgeOut]