Fix search module not showing on desktop

Remove Bootstrap collapse classes that were hiding the search on
desktop. Use CSS media queries instead: hidden on mobile by default,
visible on desktop. JS toggles .show class on mobile via the
search-toggler button.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/media/css/template.css

@@ -18672,10 +18672,14 @@ nav[data-toggle=toc] .nav-link.active+ul{
 		margin-top: 0.5rem;
 	}
 
-	.container-header .container-search.collapse:not(.show) {
+	.container-header .container-search {
 		display: none;
 	}
 
+	.container-header .container-search.show {
+		display: block;
+	}
+
 	.mod-finder__search.input-group {
 		max-width: 100%;
 	}