isValidTitle static method
Validates if a title string is acceptable for toastr
Implementation
static bool isValidTitle(String? title) {
if (title == null) return true;
if (title.trim().isEmpty) return false;
if (title.length > ToastrSecurityConfig.maxTitleLength) return false;
if (ToastrSecurityConfig.containsDangerousPattern(title)) return false;
return true;
}