```

feat(auth): 添加用户权限获取接口并完善JWT令牌角色信息

- 在JWT令牌中添加用户角色信息
- 新增get_my_permissions接口用于获取当前用户权限码列表
- 重构认证回调逻辑，增加错误日志记录
- 更新用户信息获取接口使用Authorization头验证
```

backend/app/models/inventory.py

@@ -0,0 +1,117 @@
+"""库存管理数据模型"""
+from sqlalchemy import Column, BigInteger, String, Integer, Text, TIMESTAMP, ForeignKey, Boolean, Numeric, Date
+from sqlalchemy.dialects.postgresql import JSONB
+from sqlalchemy.orm import relationship
+from sqlalchemy.sql import func
+from app.core.database import Base
+
+
+class MaterialCategory(Base):
+    __tablename__ = "material_categories"
+
+    id = Column(BigInteger, primary_key=True, index=True)
+    name = Column(String(100), nullable=False)
+    code = Column(String(50), unique=True, nullable=False)
+    description = Column(Text)
+    created_at = Column(TIMESTAMP, server_default=func.now())
+
+    materials = relationship("Material", back_populates="category")
+
+
+class Material(Base):
+    __tablename__ = "materials"
+
+    id = Column(BigInteger, primary_key=True, index=True)
+    category_id = Column(BigInteger, ForeignKey("material_categories.id"))
+    name = Column(String(200), nullable=False)
+    model = Column(String(100))
+    specification = Column(Text)
+    brand = Column(String(100))
+    unit = Column(String(20), default="个")
+    safe_quantity = Column(Integer, default=0)
+    notes = Column(Text)
+    created_at = Column(TIMESTAMP, server_default=func.now())
+    updated_at = Column(TIMESTAMP, server_default=func.now(), onupdate=func.now())
+
+    category = relationship("MaterialCategory", back_populates="materials")
+    batches = relationship("InventoryBatch", back_populates="material")
+    serial_devices = relationship("SerialDevice", back_populates="material")
+
+
+class InventoryBatch(Base):
+    __tablename__ = "inventory_batches"
+
+    id = Column(BigInteger, primary_key=True, index=True)
+    material_id = Column(BigInteger, ForeignKey("materials.id"))
+    batch_no = Column(String(50), nullable=False)
+    quantity = Column(Integer, nullable=False)
+    available_quantity = Column(Integer, nullable=False, default=0)
+    supplier = Column(String(200))
+    purchase_date = Column(Date)
+    purchase_price = Column(Numeric(10, 2))
+    expiry_date = Column(Date)
+    location = Column(String(100))
+    status = Column(String(20), default="in_stock")  # in_stock, reserved, out_of_stock
+    created_at = Column(TIMESTAMP, server_default=func.now())
+
+    material = relationship("Material", back_populates="batches")
+    serial_devices = relationship("SerialDevice", back_populates="batch")
+
+
+class SerialDevice(Base):
+    __tablename__ = "serial_devices"
+
+    id = Column(BigInteger, primary_key=True, index=True)
+    material_id = Column(BigInteger, ForeignKey("materials.id"))
+    batch_id = Column(BigInteger, ForeignKey("inventory_batches.id"))
+    serial_no = Column(String(100), unique=True, nullable=False)
+    mac_address = Column(String(17), index=True)
+    asset_no = Column(String(50))
+    status = Column(String(20), default="in_stock", index=True)
+    # in_stock, allocated, installed, in_use, returned, repairing, scrapped
+    current_location = Column(String(200))
+    installed_info = Column(JSONB)
+    onu_device_id = Column(BigInteger, ForeignKey("onu_devices.id"), nullable=True)
+    notes = Column(Text)
+    created_at = Column(TIMESTAMP, server_default=func.now())
+    updated_at = Column(TIMESTAMP, server_default=func.now(), onupdate=func.now())
+
+    material = relationship("Material", back_populates="serial_devices")
+    batch = relationship("InventoryBatch", back_populates="serial_devices")
+
+
+class InventoryTransaction(Base):
+    __tablename__ = "inventory_transactions"
+
+    id = Column(BigInteger, primary_key=True, index=True)
+    transaction_no = Column(String(50), unique=True, nullable=False)
+    transaction_type = Column(String(20), nullable=False)
+    # purchase_in, allocate_out, return_in, scrap_out, adjust
+    material_id = Column(BigInteger, ForeignKey("materials.id"))
+    batch_id = Column(BigInteger, ForeignKey("inventory_batches.id"), nullable=True)
+    serial_device_id = Column(BigInteger, ForeignKey("serial_devices.id"), nullable=True)
+    quantity = Column(Integer, nullable=False)
+    from_status = Column(String(20))
+    to_status = Column(String(20))
+    operator_id = Column(BigInteger, ForeignKey("users.id"))
+    project_name = Column(String(200))
+    installation_info = Column(JSONB)
+    notes = Column(Text)
+    created_at = Column(TIMESTAMP, server_default=func.now())
+
+
+class InventoryCheck(Base):
+    __tablename__ = "inventory_checks"
+
+    id = Column(BigInteger, primary_key=True, index=True)
+    check_no = Column(String(50), unique=True, nullable=False)
+    check_date = Column(Date, nullable=False)
+    checker_id = Column(BigInteger, ForeignKey("users.id"))
+    material_id = Column(BigInteger, ForeignKey("materials.id"))
+    batch_id = Column(BigInteger, ForeignKey("inventory_batches.id"), nullable=True)
+    book_quantity = Column(Integer)
+    actual_quantity = Column(Integer)
+    difference = Column(Integer)
+    reason = Column(Text)
+    adjusted = Column(Boolean, default=False)
+    created_at = Column(TIMESTAMP, server_default=func.now())