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/schemas/brand_supplier.py

@@ -0,0 +1,113 @@
+"""
+品牌和供应商相关的Pydantic Schema
+"""
+from typing import Optional
+from datetime import datetime
+from pydantic import BaseModel, Field, EmailStr
+
+
+# ===== 品牌Schema =====
+
+class BrandBase(BaseModel):
+    """品牌基础Schema"""
+    brand_code: str = Field(..., min_length=1, max_length=50, description="品牌代码")
+    brand_name: str = Field(..., min_length=1, max_length=200, description="品牌名称")
+    logo_url: Optional[str] = Field(None, max_length=500, description="Logo URL")
+    website: Optional[str] = Field(None, max_length=500, description="官网地址")
+    sort_order: int = Field(default=0, description="排序")
+
+
+class BrandCreate(BrandBase):
+    """创建品牌Schema"""
+    pass
+
+
+class BrandUpdate(BaseModel):
+    """更新品牌Schema"""
+    brand_name: Optional[str] = Field(None, min_length=1, max_length=200)
+    logo_url: Optional[str] = Field(None, max_length=500)
+    website: Optional[str] = Field(None, max_length=500)
+    status: Optional[str] = Field(None, pattern="^(active|inactive)$")
+    sort_order: Optional[int] = None
+
+
+class BrandInDB(BaseModel):
+    """数据库中的品牌Schema"""
+    id: int
+    brand_code: str
+    brand_name: str
+    logo_url: Optional[str]
+    website: Optional[str]
+    status: str
+    sort_order: int
+    created_at: datetime
+    updated_at: datetime
+
+    class Config:
+        from_attributes = True
+
+
+class BrandResponse(BrandInDB):
+    """品牌响应Schema"""
+    pass
+
+
+# ===== 供应商Schema =====
+
+class SupplierBase(BaseModel):
+    """供应商基础Schema"""
+    supplier_code: str = Field(..., min_length=1, max_length=50, description="供应商代码")
+    supplier_name: str = Field(..., min_length=1, max_length=200, description="供应商名称")
+    contact_person: Optional[str] = Field(None, max_length=100, description="联系人")
+    contact_phone: Optional[str] = Field(None, max_length=20, description="联系电话")
+    email: Optional[EmailStr] = Field(None, description="邮箱")
+    address: Optional[str] = Field(None, max_length=500, description="地址")
+    credit_code: Optional[str] = Field(None, max_length=50, description="统一社会信用代码")
+    bank_name: Optional[str] = Field(None, max_length=200, description="开户银行")
+    bank_account: Optional[str] = Field(None, max_length=100, description="银行账号")
+    remark: Optional[str] = Field(None, description="备注")
+
+
+class SupplierCreate(SupplierBase):
+    """创建供应商Schema"""
+    pass
+
+
+class SupplierUpdate(BaseModel):
+    """更新供应商Schema"""
+    supplier_name: Optional[str] = Field(None, min_length=1, max_length=200)
+    contact_person: Optional[str] = Field(None, max_length=100)
+    contact_phone: Optional[str] = Field(None, max_length=20)
+    email: Optional[EmailStr] = None
+    address: Optional[str] = Field(None, max_length=500)
+    credit_code: Optional[str] = Field(None, max_length=50)
+    bank_name: Optional[str] = Field(None, max_length=200)
+    bank_account: Optional[str] = Field(None, max_length=100)
+    status: Optional[str] = Field(None, pattern="^(active|inactive)$")
+    remark: Optional[str] = None
+
+
+class SupplierInDB(BaseModel):
+    """数据库中的供应商Schema"""
+    id: int
+    supplier_code: str
+    supplier_name: str
+    contact_person: Optional[str]
+    contact_phone: Optional[str]
+    email: Optional[str]
+    address: Optional[str]
+    credit_code: Optional[str]
+    bank_name: Optional[str]
+    bank_account: Optional[str]
+    status: str
+    remark: Optional[str]
+    created_at: datetime
+    updated_at: datetime
+
+    class Config:
+        from_attributes = True
+
+
+class SupplierResponse(SupplierInDB):
+    """供应商响应Schema"""
+    pass