feat(ui): unify brand accents and polish shared controls

Standardize highlighted buttons, selected controls, and loading
indicators on coollabs accent colors; improve light-mode log toolbar
styling; enhance small popups with compact/icon modes; and align
navbars, helpers, and related layouts with matching tests.

tests/Feature/HighlightedButtonStylingTest.php

@@ -0,0 +1,19 @@
+<?php
+
+test('highlighted buttons use the shared coollabs style in every color scheme', function () {
+    $utilities = file_get_contents(resource_path('css/utilities.css'));
+    $appStyles = file_get_contents(resource_path('css/app.css'));
+    $views = collect(new RecursiveIteratorIterator(new RecursiveDirectoryIterator(resource_path('views'))))
+        ->filter(fn (SplFileInfo $file): bool => $file->isFile() && $file->getExtension() === 'php')
+        ->map(fn (SplFileInfo $file): string => file_get_contents($file->getPathname()))
+        ->implode("\n");
+
+    expect($utilities)
+        ->toContain('@utility button-highlighted')
+        ->toContain('@apply border-2 text-coollabs-200 dark:text-white bg-coollabs-50 dark:bg-coollabs/20 border-coollabs dark:border-coollabs-100 hover:bg-coollabs hover:text-white dark:hover:bg-coollabs-100 dark:hover:text-white;')
+        ->and($appStyles)
+        ->toContain('button[isHighlighted]:not(:disabled)')
+        ->toContain('@apply button-highlighted;')
+        ->and($views)
+        ->not->toContain('dark:bg-warning/15! dark:text-warning! dark:ring-warning/25');
+});