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/Admin.php

@@ -132,6 +132,7 @@ class Admin {
             'siteUrl'      => home_url('/'),
             'adminUrl'     => admin_url('/'),
             'themeVersion' => wp_get_theme()->get('Version') ?: '3.4.0-dev',
+            'themeUri'     => defined('AKSRT_URI') ? AKSRT_URI : get_template_directory_uri(),
             'buildOk'      => $missing_chunks === [],
         ]);
 

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
+		);
 	}
 
 	/**

src/AKSRT/Admin/Schema/SchemaPageDisplay.php

@@ -31,15 +31,8 @@ class SchemaPageDisplay {
                             ['key' => 'header_scroll_down_hide', 'label' => '下滑隐藏导航栏', 'type' => 'switch', 'default' => true],
                         ]],
                         ['key' => 'layout-type', 'title' => '布局类型', 'fields' => [
-                            ['key' => 'header_layout', 'label' => '桌面端布局', 'type' => 'radio', 'default' => '1', 'options' => [
-                                ['label' => '布局 1（经典）', 'value' => '1'],
-                                ['label' => '布局 2（内联搜索）', 'value' => '2'],
-                                ['label' => '布局 3（紧凑）', 'value' => '3'],
-                            ]],
-                            ['key' => 'mobile_header_layout', 'label' => '移动端布局', 'type' => 'radio', 'default' => 'center', 'options' => [
-                                ['label' => '居中（含搜索按钮）', 'value' => 'center'],
-                                ['label' => '靠左', 'value' => 'left'],
-                            ]],
+                            ['key' => 'header_layout', 'label' => '桌面端布局', 'type' => 'image_select', 'default' => '1', 'options' => self::header_layout_options()],
+                            ['key' => 'mobile_header_layout', 'label' => '移动端布局', 'type' => 'image_select', 'default' => 'center', 'options' => self::mobile_header_layout_options()],
                             ['key' => 'mobile_navbar_align', 'label' => '移动端菜单方向', 'type' => 'radio', 'default' => 'left', 'options' => [
                                 ['label' => '顶部（关闭手势）', 'value' => 'top'],
                                 ['label' => '左侧滑出', 'value' => 'left'],
@@ -532,4 +525,24 @@ class SchemaPageDisplay {
             ],
         ];
     }
+
+    /** @return list<array{label:string,value:string,image:string}> */
+    private static function header_layout_options(): array {
+        $base = defined('AKSRT_URI') ? trailingslashit(AKSRT_URI) . 'assets/images/header-layout/' : '';
+        return [
+            ['label' => '布局 1（经典）', 'value' => '1', 'image' => $base . 'header_layout_1.png'],
+            ['label' => '布局 2（内联搜索）', 'value' => '2', 'image' => $base . 'header_layout_2.png'],
+            ['label' => '布局 3（紧凑）', 'value' => '3', 'image' => $base . 'header_layout_3.png'],
+        ];
+    }
+
+    /** @return list<array{label:string,value:string,image:string}> */
+    private static function mobile_header_layout_options(): array {
+        $base = defined('AKSRT_URI') ? trailingslashit(AKSRT_URI) . 'assets/images/header-layout/' : '';
+        return [
+            ['label' => '居中（含搜索按钮）', 'value' => 'center', 'image' => $base . 'mobile_header_layout_center.png'],
+            ['label' => '靠左', 'value' => 'left', 'image' => $base . 'mobile_header_layout_left.png'],
+        ];
+    }
+
 }