Error message styling

[simonLeary42]

before:

after:

before:

<script type='text/javascript'>
alert("Invalid requested action or submitted data. -- invalid HTTP_AUTHORIZATION For assistance, contact a Unity admin at support-email@unitywebportal.test. Error ID: 69aacefd0e2f7.");
</script>
<h1>Invalid requested action or submitted data.</h1>
<p>invalid HTTP_AUTHORIZATION For assistance, contact a Unity admin at support-email@unitywebportal.test. Error ID: 69aacefd0e2f7.</p>

after:

<script type='text/javascript'>
alert("Invalid requested action or submitted data. -- invalid HTTP_AUTHORIZATION -- For assistance, contact a Unity admin at support-email@unitywebportal.test -- Error ID: 69aad22600c71");
</script>
<h1>Invalid requested action or submitted data.</h1>
<p>
invalid HTTP_AUTHORIZATION
<br>
For assistance, contact a Unity admin at support-email@unitywebportal.test
<br>
Error ID: 69aad22600c71
</p>

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after:

before:

after:

[Copilot]

Pull request overview

This PR improves how error messages are displayed by preserving line breaks in message bodies and formatting “graceful die” output into multi-line text for readability.

Changes:

• Add CSS to render newline characters in .message p as visual line breaks (white-space: pre-line).
• Update UnityHTTPD::gracefulDie() to build error body content as lines and render them with <br> separators / -- separators for alerts.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
webroot/css/messages.css	Preserves newlines in message bodies to improve readability of multi-line errors.
resources/lib/UnityHTTPD.php	Reworks error message construction/rendering to be line-oriented for cleaner display.

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[simonLeary42]

TODO don't add em dashes between every sentence in the body