fix: 修复多个关键问题

- 修复前端路由守卫：未登录时不显示提示，直接跳转登录页
- 修复API拦截器：401错误不显示提示，直接跳转
- 增强验证码显示：图片尺寸从120x40增加到200x80
- 增大验证码字体：从28号增加到48号
- 优化验证码字符：排除易混淆的0和1
- 减少干扰线：从5条减少到3条，添加背景色优化
- 增强登录API日志：添加详细的调试日志
- 增强验证码生成和验证日志
- 优化异常处理和错误追踪

影响文件：
- src/router/index.ts
- src/api/request.ts
- app/services/auth_service.py
- app/api/v1/auth.py
- app/schemas/user.py

测试状态：
- 前端构建通过
- 后端语法检查通过
- 验证码显示效果优化完成

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

app/models/asset.py

@@ -0,0 +1,84 @@
+"""
+资产相关数据模型
+"""
+from datetime import datetime, date
+from sqlalchemy import Column, BigInteger, String, Integer, Text, ForeignKey, DateTime, Date, Numeric, Index
+from sqlalchemy.dialects.postgresql import JSONB
+from sqlalchemy.orm import relationship
+from app.db.base import Base
+
+
+class Asset(Base):
+    """资产表"""
+
+    __tablename__ = "assets"
+
+    id = Column(BigInteger, primary_key=True, index=True)
+    asset_code = Column(String(50), unique=True, nullable=False, index=True, comment="资产编码")
+    asset_name = Column(String(200), nullable=False, comment="资产名称")
+    device_type_id = Column(BigInteger, ForeignKey("device_types.id"), nullable=False, comment="设备类型ID")
+    brand_id = Column(BigInteger, ForeignKey("brands.id"), nullable=True, comment="品牌ID")
+    model = Column(String(200), nullable=True, comment="规格型号")
+    serial_number = Column(String(200), nullable=True, index=True, comment="序列号(SN)")
+    supplier_id = Column(BigInteger, ForeignKey("suppliers.id"), nullable=True, comment="供应商ID")
+    purchase_date = Column(Date, nullable=True, index=True, comment="采购日期")
+    purchase_price = Column(Numeric(18, 2), nullable=True, comment="采购价格")
+    warranty_period = Column(Integer, nullable=True, comment="保修期(月)")
+    warranty_expire_date = Column(Date, nullable=True, comment="保修到期日期")
+    organization_id = Column(BigInteger, ForeignKey("organizations.id"), nullable=False, comment="所属网点ID")
+    location = Column(String(500), nullable=True, comment="存放位置")
+    status = Column(String(20), default="pending", nullable=False, index=True, comment="状态")
+    dynamic_attributes = Column(JSONB, default={}, comment="动态字段值")
+    qr_code_url = Column(String(500), nullable=True, comment="二维码图片URL")
+    remark = Column(Text, nullable=True, comment="备注")
+    created_at = Column(DateTime, default=datetime.utcnow, nullable=False)
+    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow, nullable=False)
+    created_by = Column(BigInteger, ForeignKey("users.id"), nullable=True)
+    updated_by = Column(BigInteger, ForeignKey("users.id"), nullable=True)
+    deleted_at = Column(DateTime, nullable=True)
+    deleted_by = Column(BigInteger, ForeignKey("users.id"), nullable=True)
+
+    # 关系
+    device_type = relationship("DeviceType", back_populates="assets")
+    brand = relationship("Brand", back_populates="assets")
+    supplier = relationship("Supplier", back_populates="assets")
+    organization = relationship("Organization")
+    created_user = relationship("User", foreign_keys=[created_by])
+    updated_user = relationship("User", foreign_keys=[updated_by])
+    deleted_user = relationship("User", foreign_keys=[deleted_by])
+    status_history = relationship("AssetStatusHistory", back_populates="asset", cascade="all, delete-orphan")
+
+    def __repr__(self):
+        return f"<Asset(id={self.id}, asset_code={self.asset_code}, asset_name={self.asset_name})>"
+
+
+class AssetStatusHistory(Base):
+    """资产状态历史表"""
+
+    __tablename__ = "asset_status_history"
+
+    id = Column(BigInteger, primary_key=True, index=True)
+    asset_id = Column(BigInteger, ForeignKey("assets.id", ondelete="CASCADE"), nullable=False, comment="资产ID")
+    old_status = Column(String(20), nullable=True, comment="原状态")
+    new_status = Column(String(20), nullable=False, index=True, comment="新状态")
+    operation_type = Column(String(50), nullable=False, comment="操作类型")
+    operator_id = Column(BigInteger, ForeignKey("users.id"), nullable=False, comment="操作人ID")
+    operator_name = Column(String(100), nullable=True, comment="操作人姓名(冗余)")
+    organization_id = Column(BigInteger, ForeignKey("organizations.id"), nullable=True, comment="相关网点ID")
+    remark = Column(Text, nullable=True, comment="备注")
+    extra_data = Column(JSONB, nullable=True, comment="额外数据")
+    created_at = Column(DateTime, default=datetime.utcnow, nullable=False, index=True)
+
+    # 关系
+    asset = relationship("Asset", back_populates="status_history")
+    operator = relationship("User", foreign_keys=[operator_id])
+    organization = relationship("Organization")
+
+    # 索引
+    __table_args__ = (
+        Index("idx_asset_status_history_asset", "asset_id"),
+        Index("idx_asset_status_history_time", "created_at"),
+    )
+
+    def __repr__(self):
+        return f"<AssetStatusHistory(id={self.id}, asset_id={self.asset_id}, old_status={self.old_status}, new_status={self.new_status})>"