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/recovery.py

@@ -0,0 +1,73 @@
+"""
+资产回收相关数据模型
+"""
+from datetime import datetime, date
+from sqlalchemy import Column, BigInteger, String, Integer, Text, ForeignKey, DateTime, Date, Index
+from sqlalchemy.orm import relationship
+from app.db.base import Base
+
+
+class AssetRecoveryOrder(Base):
+    """资产回收单表"""
+
+    __tablename__ = "asset_recovery_orders"
+
+    id = Column(BigInteger, primary_key=True, index=True)
+    order_code = Column(String(50), unique=True, nullable=False, index=True, comment="回收单号")
+    recovery_type = Column(String(20), nullable=False, index=True, comment="回收类型(user=使用人回收/org=机构回收/scrap=报废回收)")
+    title = Column(String(200), nullable=False, comment="标题")
+    asset_count = Column(Integer, default=0, nullable=False, comment="资产数量")
+    apply_user_id = Column(BigInteger, ForeignKey("users.id"), nullable=False, index=True, comment="申请人ID")
+    apply_time = Column(DateTime, nullable=False, comment="申请时间")
+    approval_status = Column(String(20), default="pending", nullable=False, index=True, comment="审批状态")
+    approval_user_id = Column(BigInteger, ForeignKey("users.id"), nullable=True, comment="审批人ID")
+    approval_time = Column(DateTime, nullable=True, comment="审批时间")
+    approval_remark = Column(Text, nullable=True, comment="审批备注")
+    execute_status = Column(String(20), default="pending", nullable=False, index=True, comment="执行状态")
+    execute_user_id = Column(BigInteger, ForeignKey("users.id"), nullable=True, comment="执行人ID")
+    execute_time = Column(DateTime, nullable=True, comment="执行时间")
+    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)
+
+    # 关系
+    apply_user = relationship("User", foreign_keys=[apply_user_id])
+    approval_user = relationship("User", foreign_keys=[approval_user_id])
+    execute_user = relationship("User", foreign_keys=[execute_user_id])
+    items = relationship("AssetRecoveryItem", back_populates="order", cascade="all, delete-orphan")
+
+    # 索引
+    __table_args__ = (
+        Index("idx_recovery_orders_code", "order_code"),
+        Index("idx_recovery_orders_type", "recovery_type"),
+    )
+
+    def __repr__(self):
+        return f"<AssetRecoveryOrder(id={self.id}, order_code={self.order_code}, recovery_type={self.recovery_type})>"
+
+
+class AssetRecoveryItem(Base):
+    """资产回收单明细表"""
+
+    __tablename__ = "asset_recovery_items"
+
+    id = Column(BigInteger, primary_key=True, index=True)
+    order_id = Column(BigInteger, ForeignKey("asset_recovery_orders.id", ondelete="CASCADE"), nullable=False, comment="回收单ID")
+    asset_id = Column(BigInteger, ForeignKey("assets.id"), nullable=False, comment="资产ID")
+    asset_code = Column(String(50), nullable=False, comment="资产编码")
+    recovery_status = Column(String(20), default="pending", nullable=False, index=True, comment="回收状态")
+    created_at = Column(DateTime, default=datetime.utcnow, nullable=False)
+
+    # 关系
+    order = relationship("AssetRecoveryOrder", back_populates="items")
+    asset = relationship("Asset")
+
+    # 索引
+    __table_args__ = (
+        Index("idx_recovery_items_order", "order_id"),
+        Index("idx_recovery_items_asset", "asset_id"),
+        Index("idx_recovery_items_status", "recovery_status"),
+    )
+
+    def __repr__(self):
+        return f"<AssetRecoveryItem(id={self.id}, order_id={self.order_id}, asset_code={self.asset_code})>"