feat: 移除PDI和订单号字段，新增设备巡检模块

- 从物料跟踪页面移除订单号列和表单字段
- 从导航菜单移除PDI管理，添加设备巡检
- 新增InspectionLocation和InspectionRecord后端模型和API
- 新增设备巡检前端页面（左侧点位列表，右侧设备和历史记录）

backend/app/schemas/user.py

@@ -0,0 +1,41 @@
+from pydantic import BaseModel
+from typing import Optional
+from datetime import datetime
+
+
+class LoginRequest(BaseModel):
+    username: str
+    password: str
+
+
+class Token(BaseModel):
+    access_token: str
+    token_type: str = "bearer"
+    username: str
+    role: str
+
+
+class UserCreate(BaseModel):
+    username: str
+    full_name: Optional[str] = None
+    password: str
+    role: str = "operator"
+
+
+class UserUpdate(BaseModel):
+    full_name: Optional[str] = None
+    role: Optional[str] = None
+    is_active: Optional[bool] = None
+    password: Optional[str] = None
+
+
+class UserOut(BaseModel):
+    id: int
+    username: str
+    full_name: Optional[str]
+    role: str
+    is_active: bool
+    created_at: datetime
+
+    class Config:
+        from_attributes = True