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/js/template.js

@@ -539,6 +539,20 @@
 		});
 	}
 
+	/**
+	 * Toggle search on mobile via .show class
+	 */
+	function initSearchToggle() {
+		var btn = doc.querySelector(".search-toggler");
+		var target = doc.getElementById("headerSearchCollapse");
+		if (!btn || !target) return;
+
+		btn.addEventListener("click", function () {
+			var isOpen = target.classList.toggle("show");
+			btn.setAttribute("aria-expanded", isOpen ? "true" : "false");
+		});
+	}
+
 	/**
 	 * Run all template JS initializations
 	 */
@@ -563,6 +577,7 @@
 		// Init features
 		initDrawers();
 		initBackTop();
+		initSearchToggle();
 		initSidebarAccordion();
 	}