添加了更严格的邮箱格式检查

internal/handler/helpers.go

@@ -5,6 +5,7 @@ import (
 	"carrotskin/internal/model"
 	"carrotskin/internal/types"
 	"net/http"
+	"regexp"
 	"strconv"
 
 	"github.com/gin-gonic/gin"
@@ -227,3 +228,14 @@ func RespondWithError(c *gin.Context, err error) {
 	// 默认返回500错误
 	RespondServerError(c, err.Error(), err)
 }
+
+// isValidEmail 验证邮箱格式
+func isValidEmail(email string) bool {
+	if email == "" {
+		return false
+	}
+	// 更严格的邮箱格式验证
+	emailRegex := `^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$`
+	matched, _ := regexp.MatchString(emailRegex, email)
+	return matched
+}