feat(widgets): rebuild admin widgets page to match reference theme

- Replace transfer modal/admin-post flow with reference-style AJAX
  export/import/template dialogs (admin-transfer.js, TransferController)
- Customizer "移出模块" action, reference lazy form loading with t-notice
- Common fields use reference labels, dependencies, compact/inline rows,
  top/bottom-only extra spacing; form header with description/reminder
- Remove placement hint, template preview and legacy transfer code
- Fix widget audit (current_datetime stub, honor catalog common flags)
  and regenerate stale golden fixtures for posts_toc, quote, posts

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/WidgetSystem/AdminFormController.php

@@ -31,26 +31,57 @@ final class AdminFormController {
 		aksrt_icon_picker_assets(['wp-color-picker']);
 		wp_enqueue_script('aksrt-widget-admin-core', AKSRT_URI . '/assets/widgets/admin-core.js', [], AKSRT_VERSION, true);
 		wp_enqueue_script('aksrt-widget-admin', AKSRT_URI . '/assets/widgets/admin.js', ['jquery', 'jquery-ui-sortable', 'wp-color-picker', 'aksrt-widget-admin-core'], AKSRT_VERSION, true);
-		$sidebars = [];
-		foreach ((array) ($GLOBALS['wp_registered_sidebars'] ?? []) as $id => $sidebar) {
-			$sidebars[(string) $id] = (string) ($sidebar['name'] ?? $id);
-		}
+		wp_enqueue_script('aksrt-widget-admin-transfer', AKSRT_URI . '/assets/widgets/admin-transfer.js', ['jquery', 'aksrt-widget-admin'], AKSRT_VERSION, true);
 		wp_localize_script('aksrt-widget-admin', 'aksrtWidgetAdmin', [
 			'ajaxUrl' => admin_url('admin-ajax.php'),
 			'action'  => self::AJAX_ACTION,
 			'nonce'   => wp_create_nonce(self::NONCE_ACTION),
-			'transferNonce' => wp_create_nonce('aksrt_widgets_transfer'),
-			'sidebars' => $sidebars,
-			'i18n'    => [
-				'loading' => __('正在加载模块配置…', 'aksrt'),
-				'error'   => __('加载失败，请重试。', 'aksrt'),
-				'export'  => __('导出', 'aksrt'),
-				'import'  => __('导入', 'aksrt'),
-				'template' => __('应用模板', 'aksrt'),
-			],
+			'transferNonce' => wp_create_nonce(TransferController::NONCE),
+			'i18n'    => self::i18n(),
 		]);
 	}
 
+	/** @return array<string,string> */
+	private static function i18n(): array {
+		return [
+			'loading'              => __('正在加载模块配置…', 'aksrt'),
+			'error'                => __('加载失败，请刷新页面后重试', 'aksrt'),
+			'confirmImportReplace' => __('将覆盖当前容器中已有的全部模块，导入内容将替换该侧栏；确定继续？', 'aksrt'),
+			'confirmImportAppend'  => __('将在当前容器已有模块列表末尾追加导入内容，不会删除原有模块；确定继续？', 'aksrt'),
+			'importModeLabel'      => __('导入方式', 'aksrt'),
+			'importModeReplace'    => __('覆盖（替换现有）', 'aksrt'),
+			'importModeAppend'     => __('追加（保留现有）', 'aksrt'),
+			'loadingExport'        => __('正在生成 JSON…', 'aksrt'),
+			'loadingImport'        => __('正在导入…', 'aksrt'),
+			'copyDone'             => __('已复制', 'aksrt'),
+			'copyFail'             => __('复制失败，请手动全选复制', 'aksrt'),
+			'exportTitle'          => __('导出 JSON（可复制）', 'aksrt'),
+			'importTitle'          => __('导入 JSON（粘贴后确认）', 'aksrt'),
+			'importHint'           => __('将导出得到的 JSON 粘贴到下方文本框以导入。注意：不同主题版本或非同站的的模块导入后可能会出现错误，此时可以重新配置一下有错误的模块，即可恢复正常', 'aksrt'),
+			'exportHint'           => __('以下为当前容器模块数据，可直接全选复制保存。', 'aksrt'),
+			'close'                => __('关闭', 'aksrt'),
+			'copy'                 => __('复制全部', 'aksrt'),
+			'submitImport'         => __('确认导入', 'aksrt'),
+			'reloadPage'           => __('刷新页面', 'aksrt'),
+			'templateModalTitle'   => __('从模板导入', 'aksrt'),
+			'templateHint'         => __('使用模板可快速配置网站布局，选择对应的模板点击导入即可。', 'aksrt') . '<div class="aksrt-wie-remind"><b>' . __('注意事项：', 'aksrt') . '</b>' . __('1.导入模板必须对容器位置对应，例如不能将侧边栏模板导入到全宽度中！', 'aksrt') . '<br>' . __('2.导入模板需已经有对应的内容，例如：导入文章相关的模板，那么至少已经有多篇文章和文章分类', 'aksrt') . '</div>',
+			'templateLoadingList'  => __('正在加载模板列表…', 'aksrt'),
+			'templateEmpty'        => __('暂无可用模板。', 'aksrt'),
+			'templateSubmit'       => __('导入所选模板', 'aksrt'),
+			'confirmTemplate'      => __('确定导入模板「{title}」吗？导入方式：{mode}', 'aksrt'),
+			'templatePick'         => __('请选择一个模板。', 'aksrt'),
+			'exportFailed'         => __('导出失败', 'aksrt'),
+			'importSuccess'        => __('导入成功', 'aksrt'),
+			'importFailed'         => __('导入失败', 'aksrt'),
+			'pasteJsonFirst'       => __('请先粘贴 JSON', 'aksrt'),
+			'exportModules'        => __('导出模块', 'aksrt'),
+			'importModules'        => __('导入模块', 'aksrt'),
+			'importTemplate'       => __('模板导入', 'aksrt'),
+			'removeModule'         => __('移出模块', 'aksrt'),
+			'networkError'         => __('网络错误，请刷新页面后重试', 'aksrt'),
+		];
+	}
+
 	public static function ajax_form(): void {
 		check_ajax_referer(self::NONCE_ACTION, 'nonce');
 		if (!current_user_can('edit_theme_options')) {