feat(nav): finish remaining parity gaps (image_select, AJAX search, senior UI)

- Layout image_select previews (zibll PNGs under assets/images/header-layout)
- Localize aksrtAdminData.themeUri for admin SPA asset URLs
- Layout-2 inline search AJAX suggestions via aksrt_search_suggestions
- Appearance→Menus visual senior submenu editor (cards/columns)
- Acceptance checklist + automated source contract report

src/AKSRT/Admin/NavMenuOptions.php

@@ -14,6 +14,24 @@ class NavMenuOptions {
 	public static function init(): void {
 		add_action('wp_nav_menu_item_custom_fields', [self::class, 'render_fields'], 10, 2);
 		add_action('wp_update_nav_menu_item', [self::class, 'save'], 10, 2);
+		add_action('admin_enqueue_scripts', [self::class, 'enqueue_admin']);
+	}
+
+	public static function enqueue_admin(string $hook): void {
+		if ($hook !== 'nav-menus.php') {
+			return;
+		}
+		$path = get_template_directory() . '/assets/js/admin-nav-menu-senior.js';
+		if (!file_exists($path)) {
+			return;
+		}
+		wp_enqueue_script(
+			'aksrt-admin-nav-menu-senior',
+			get_template_directory_uri() . '/assets/js/admin-nav-menu-senior.js',
+			['jquery'],
+			(string) filemtime($path),
+			true
+		);
 	}
 
 	/**