Hide search results on Escape key on desktop too for Aliki (#1593)

Extract commits from #1585

Author: ccmywish

lib/rdoc/generator/template/aliki/js/aliki.js

@@ -94,6 +94,14 @@ function hookSearch() {
     }
   });
 
+  // Hide search results on Escape key on desktop too
+  document.addEventListener('keydown', (e) => {
+    if (e.key === 'Escape' && input.matches(":focus")) {
+      search.hide();
+      input.blur();
+    }
+  });
+
   // Show search results when focusing on input (if there's a query)
   input.addEventListener('focus', () => {
     if (input.value.trim()) {