feat(frontend): restore Zibll-like global search panel

Render full search overlay with types/history/suggestions for tabbar
and desktop header toggle. Open panel on all viewports (not mobile-only)
and wire data-toggle-class/.navbar-search compatibility hooks.

footer.php

@@ -459,6 +459,14 @@ if ($floating_enabled) :
 </nav>
 <?php endif; ?>
 
+<?php
+// Global search panel (desktop header button + mobile tabbar search).
+$aksrt_search_panel = AKSRT_DIR . '/templates/parts/search-panel.php';
+if (is_readable($aksrt_search_panel)) {
+	include $aksrt_search_panel;
+}
+?>
+
 <?php if (is_active_sidebar('all_bottom_fluid')) : ?>
 <div class="fluid-widget-wrap">
 	<?php dynamic_sidebar('all_bottom_fluid'); ?>