Timezone for displayDate Helper defaults to config timezone

[neurotools]

If the user doesn't provide a timezone when calling displayDate Helper, the helper returns the name of the timezone and not the date (see Carbon::tz() usage).

With this PR, the timezone defaults to the one configured on app.timezone.

[JonoB]

Something doesn't seem right here. If tz is null, then Carbon should use the server's timezone.

> \Carbon\Carbon::parse('2025-05-15')->copy()->tz(null);

= Carbon\Carbon @1747267200 {#5446
    date: 2025-05-15 00:00:00.0 UTC (+00:00),
  }

[neurotools]

@JonoB What version of Carbon do you have? I just tried on my fresh installation:

\Carbon\Carbon::parse('2025-05-15')->copy()->tz(null);
= "America/Santiago"

I have Carbon 3.9.1