feat(nav): deep-align menu_search panel, pill radius, senior media

- Layout-2 remote-box AJAX panel (history/hot/posts) via aksrt_menu_search
- Live suggestions for post/topic/product; local history for guests
- Publish radius switch (zibll bool pill) mapped to CSS radius class
- Senior menu editor: WP media library image picker
- Active menu underline + panel CSS; acceptance/contract updates

inc/helpers/header/aksrt-header-navbar.php

@@ -104,7 +104,14 @@ if (!function_exists('aksrt_get_menu_search')) :
 		$type        = (string) ($state['type'] ?? 'post');
 		$cat_enabled = !empty($state['category_enabled']);
 		$cat_id      = (int) ($state['category_id'] ?? 0);
-		$hots        = is_array($ctx['search_hot_keywords'] ?? null) ? $ctx['search_hot_keywords'] : [];
+
+		// zibll remote-box: panel HTML loaded via ajax action menu_search.
+		$remote_url = add_query_arg(
+			[
+				'action' => 'aksrt_menu_search',
+			],
+			admin_url('admin-ajax.php')
+		);
 
 		echo '<form method="get" class="navbar-form navbar-left hover-show" action="' . esc_url(home_url('/')) . '" role="search" data-aksrt-search-form="inline">';
 		echo '<div class="form-group relative dropdown">';
@@ -116,19 +123,10 @@ if (!function_exists('aksrt_get_menu_search')) :
 			. esc_attr(get_search_query()) . '" placeholder="' . esc_attr($placeholder) . '" autocomplete="off">';
 		echo '<div class="abs-right muted-3-color"><button type="submit" class="null" aria-label="'
 			. esc_attr__('搜索', 'aksrt') . '"><i class="fas fa-search" aria-hidden="true"></i></button></div>';
-		if ($hots) {
-			echo '<div class="dropdown-menu hover-show-con navbar-inline-search-panel">';
-			echo '<div class="muted-2-color em09 mb6">' . esc_html__('热门搜索', 'aksrt') . '</div>';
-			echo '<div class="navbar-inline-search-hots">';
-			foreach ($hots as $kw) {
-				$kw = trim((string) $kw);
-				if ($kw === '') {
-					continue;
-				}
-				echo '<a class="but jb-sm" href="' . esc_url(home_url('/?s=' . rawurlencode($kw))) . '">' . esc_html($kw) . '</a> ';
-			}
-			echo '</div></div>';
-		}
+		// Remote panel mount (zibll remote-box / lazyload-action=ias).
+		echo '<div class="aksrt-remote-box lazyload" remote-box="' . esc_url($remote_url) . '" lazyload-action="ias" data-aksrt-menu-search-remote="1">';
+		echo '<i class="loading-spot"><i></i></i>';
+		echo '</div>';
 		echo '</div></form>';
 	}
 endif;