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

src/AKSRT/Admin/Schema/SchemaPageDisplay.php

@@ -50,7 +50,7 @@ class SchemaPageDisplay {
                         ['key' => 'newposts', 'title' => '发布按钮', 'fields' => [
                             ['key' => 'header_newposts_enabled', 'label' => '启用发布按钮', 'type' => 'switch', 'default' => true],
                             ['key' => 'header_newposts_text', 'label' => '按钮文案', 'type' => 'input', 'default' => '<i class="fa fa-pencil"></i> 发布'],
-                            ['key' => 'header_newposts_radius', 'label' => '圆角', 'type' => 'number', 'default' => 20, 'min' => 0, 'max' => 30],
+                            ['key' => 'header_newposts_radius', 'label' => '按钮圆角（胶囊）', 'type' => 'switch', 'default' => true],
                             ['key' => 'header_newposts_class', 'label' => '样式类', 'type' => 'input', 'default' => ''],
                             ['key' => 'header_newposts_types', 'label' => '发布类型', 'type' => 'select', 'default' => ['post'], 'options' => [
                                 ['label' => '文章', 'value' => 'post'],