Bug: Smarty modifiers should support null/missing values

Quick Information

• Operating System:
• Browser: Chrome / Firefox / Edge / Safari
• Device: Computer / Tablet / Mobile

What Happened?

When using modifiers in Hazaar MVC Smarty templates, an error occurs if a parameter is null or missing. The specific error message is: An error occurred parsing the Smarty template: Hazaar\Template\Smarty\Modifier::capitalize(): Argument #1 ($string) must be of type string, null given, called in /opt/hazaar/vendor/hazaarlabs/hazaar-mvc/src/Template/Smarty.php(228) : eval()'d code on line 72.

Expected result

Modifiers in Smarty templates should handle null or missing parameters gracefully without throwing errors. Ideally, they should either skip the modification or apply a default value.

Steps to reproduce

1. Create a Smarty template that uses a modifier, such as capitalize.
2. Pass a variable to the template that is null or missing.
3. Render the template.
4. Observe the error due to the null parameter.

Screenshots

Priority/Severity

• High (anything that impacts the normal user flow or blocks app usage)
• Medium (anything that negatively affects the user experience)
• Low (anything else e.g., typos, missing icons, layout issues, etc.)