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/maintenance.py

@@ -0,0 +1,57 @@
+"""
+维修管理相关数据模型
+"""
+from datetime import datetime, date
+from sqlalchemy import Column, BigInteger, String, Integer, Text, ForeignKey, DateTime, Date, Numeric, Index
+from sqlalchemy.orm import relationship
+from app.db.base import Base
+
+
+class MaintenanceRecord(Base):
+    """维修记录表"""
+
+    __tablename__ = "maintenance_records"
+
+    id = Column(BigInteger, primary_key=True, index=True)
+    record_code = Column(String(50), unique=True, nullable=False, index=True, comment="维修单号")
+    asset_id = Column(BigInteger, ForeignKey("assets.id"), nullable=False, index=True, comment="资产ID")
+    asset_code = Column(String(50), nullable=False, comment="资产编码")
+    fault_description = Column(Text, nullable=False, comment="故障描述")
+    fault_type = Column(String(50), nullable=True, comment="故障类型")
+    report_user_id = Column(BigInteger, ForeignKey("users.id"), nullable=True, comment="报修人ID")
+    report_time = Column(DateTime, default=datetime.utcnow, nullable=False, index=True, comment="报修时间")
+    priority = Column(String(20), default="normal", nullable=False, comment="优先级")
+    maintenance_type = Column(String(20), nullable=True, comment="维修类型")
+    vendor_id = Column(BigInteger, ForeignKey("suppliers.id"), nullable=True, comment="维修供应商ID")
+    maintenance_cost = Column(Numeric(18, 2), nullable=True, comment="维修费用")
+    start_time = Column(DateTime, nullable=True, comment="开始维修时间")
+    complete_time = Column(DateTime, nullable=True, comment="完成维修时间")
+    maintenance_user_id = Column(BigInteger, ForeignKey("users.id"), nullable=True, comment="维修人员ID")
+    maintenance_result = Column(Text, nullable=True, comment="维修结果描述")
+    replaced_parts = Column(Text, nullable=True, comment="更换的配件")
+    status = Column(String(20), default="pending", nullable=False, index=True, comment="状态")
+    images = Column(Text, nullable=True, comment="维修图片URL（多个逗号分隔）")
+    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)
+
+    # 关系
+    asset = relationship("Asset")
+    vendor = relationship("Supplier")
+    report_user = relationship("User", foreign_keys=[report_user_id])
+    maintenance_user = relationship("User", foreign_keys=[maintenance_user_id])
+    created_user = relationship("User", foreign_keys=[created_by])
+    updated_user = relationship("User", foreign_keys=[updated_by])
+
+    # 索引
+    __table_args__ = (
+        Index("idx_maintenance_records_code", "record_code"),
+        Index("idx_maintenance_records_asset", "asset_id"),
+        Index("idx_maintenance_records_status", "status"),
+        Index("idx_maintenance_records_time", "report_time"),
+    )
+
+    def __repr__(self):
+        return f"<MaintenanceRecord(id={self.id}, record_code={self.record_code}, asset_code={self.asset_code})>"