初始提交：项目基础结构

- backend: FastAPI 后端服务 (Python)
- frontend: React + Tauri 前端应用
- docker-compose.yml: 容器编排配置

backend/app/models/production_order.py

@@ -0,0 +1,31 @@
+"""生产订单模型"""
+import uuid
+from datetime import datetime, timezone
+from sqlalchemy import String, DateTime
+from sqlalchemy.dialects.postgresql import UUID
+from sqlalchemy.orm import Mapped, mapped_column
+
+from app.models.base import Base
+
+
+class ProductionOrder(Base):
+    __tablename__ = "production_orders"
+
+    id: Mapped[uuid.UUID] = mapped_column(
+        UUID(as_uuid=True), primary_key=True, default=uuid.uuid4,
+    )
+    order_no: Mapped[str] = mapped_column(
+        String(64), unique=True, index=True, nullable=False, comment="订单编号",
+    )
+    customer_info: Mapped[str | None] = mapped_column(
+        String(500), nullable=True, comment="客户信息",
+    )
+    status: Mapped[str] = mapped_column(
+        String(50), nullable=False, default="pending", comment="订单状态",
+    )
+    created_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), default=lambda: datetime.now(timezone.utc), comment="创建时间",
+    )
+
+    def __repr__(self) -> str:
+        return f"<ProductionOrder {self.order_no}>"