后端模块拆分

src/inventory/api/schemas/product_schemas.py

@@ -0,0 +1,63 @@
+from pydantic import BaseModel
+from typing import Optional, List
+from datetime import datetime
+from decimal import Decimal
+
+
+class ProductCreate(BaseModel):
+    sku: str
+    name: str
+    description: Optional[str] = None
+    category: Optional[str] = None
+    unit: str = "件"
+    item_type: str = "finished"
+    cost_price: Decimal = Decimal("0")
+    sale_price: Decimal = Decimal("0")
+    min_stock: int = 0
+    max_stock: int = 1000
+
+
+class ProductResponse(BaseModel):
+    id: int
+    sku: str
+    name: str
+    description: Optional[str]
+    category: Optional[str]
+    unit: str
+    item_type: str
+    cost_price: Decimal
+    sale_price: Decimal
+    min_stock: int
+    max_stock: int
+    material_cost: Decimal = Decimal("0")
+    is_active: bool
+    created_at: datetime
+
+    class Config:
+        from_attributes = True
+
+
+class ProductMaterialItemUpdate(BaseModel):
+    material_id: int
+    quantity: Decimal
+    loss_rate: Decimal = Decimal("0")
+
+
+class ProductBOMUpdate(BaseModel):
+    items: List[ProductMaterialItemUpdate]
+
+
+class ProductMaterialItemResponse(BaseModel):
+    material_id: int
+    material_sku: str
+    material_name: str
+    quantity: Decimal
+    unit_cost: Decimal
+    line_cost: Decimal
+
+
+class ProductBOMResponse(BaseModel):
+    product_id: int
+    product_name: str
+    total_material_cost: Decimal
+    items: List[ProductMaterialItemResponse]