弃用自定义错误函数，直接使用 fiber.Err；更新 README.md 文档

web/handlers/user.go

@@ -2,7 +2,6 @@ package handlers
 
 import (
 	"platform/web/auth"
-	"platform/web/core"
 	trade2 "platform/web/domains/trade"
 	m "platform/web/models"
 	q "platform/web/queries"
@@ -115,7 +114,7 @@ func UpdatePassword(c *fiber.Ctx) error {
 
 	// 验证手机令牌
 	if req.Phone == "" || req.Code == "" {
-		return core.ErrInvalid("手机号码和验证码不能为空")
+		return fiber.NewError(fiber.StatusBadRequest, "手机号码和验证码不能为空")
 	}
 	err = s.Verifier.VerifySms(c.Context(), req.Phone, req.Code)
 	if err != nil {