fix(revive): rename unused parameters to _ for lint compliance

internal/apps/user/constants.go

@@ -16,3 +16,13 @@ limitations under the License.
 */
 
 package user
+
+import "time"
+
+const (
+	verificationCodeRange  = 900000           // 验证码随机范围
+	verificationCodeOffset = 100000           // 验证码偏移量（保证 6 位）
+	emailCodeExpiry        = 5 * time.Minute  // 验证码有效期
+	emailCodeCooldown      = 60 * time.Second // 验证码发送冷却时间
+	minPasswordLength      = 8                // 密码最小长度
+)