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>

assets/widgets/admin.js

@@ -22,7 +22,6 @@
     });
     evaluateDependencies($root);
 	updateWidgetTitle($root);
-	updatePlacementWarning($root);
 	updateRepeaterControls($root);
   }
 
@@ -54,82 +53,6 @@
 		}).first().replaceWith(`${title} `);
 	}
 
-	function updatePlacementWarning(root) {
-		const $widget = $(root).closest('.widget');
-		const $hint = $widget.find('.aksrt-widget-placement-hint').first();
-		if (!$hint.length) return;
-		const size = String($hint.data('widget-size') || 'any');
-		const area = String($widget.closest('.widgets-sortables').attr('id') || '');
-		const isSidebar = /sidebar/.test(area);
-		$hint.toggleClass('is-warning', (size === 'wide' && isSidebar) || (size === 'sidebar' && !isSidebar && area !== ''));
-	}
-
-  function injectTransferToolbar($anchor, sidebarId) {
-    if (!$anchor?.length || !sidebarId || $anchor.next('.aksrt-widget-transfer-toolbar').length) return;
-    const $toolbar = $('<div class="aksrt-widget-transfer-toolbar" role="group"></div>');
-    [
-      ['export', config.i18n?.export || '导出'],
-      ['import', config.i18n?.import || '导入'],
-      ['template', config.i18n?.template || '应用模板'],
-    ].forEach(([action, label]) => {
-      $('<button type="button" class="button button-small"></button>')
-        .text(label)
-        .attr('data-aksrt-transfer-action', action)
-        .attr('data-sidebar-id', sidebarId)
-        .appendTo($toolbar);
-    });
-    $anchor.after($toolbar);
-  }
-
-  function scanWidgetAreas() {
-    $('.widgets-holder-wrap:not(#available-widgets):not(.inactive-sidebar)').each(function () {
-      const $wrap = $(this);
-      const $sortables = $wrap.find('.widgets-sortables').first();
-      const sidebarId = String($sortables.attr('id') || '');
-      if (!sidebarId) return;
-      const $description = $sortables.find('.sidebar-description .description').first();
-      const $anchor = $description.length ? $description : $sortables.find('.description').first();
-      if ($anchor.length) injectTransferToolbar($anchor, sidebarId);
-    });
-
-    $('.control-section-sidebar').each(function () {
-      const $section = $(this);
-      const sectionId = String($section.attr('id') || '');
-      const prefix = 'sub-accordion-section-sidebar-widgets-';
-      if (!sectionId.startsWith(prefix)) return;
-      const sidebarId = sectionId.slice(prefix.length);
-      const $description = $section.find('.section-meta .description').first();
-      const $anchor = $description.length ? $description : $section.find('.accordion-section-title, .customize-section-title').first();
-      if ($anchor.length) injectTransferToolbar($anchor, sidebarId);
-    });
-
-    $('.customize-control-widget_form').each(function () {
-      const $control = $(this);
-      const $nav = $control.find('.widget-reorder-nav').first();
-      if (!$nav.length || $nav.find('.aksrt-widget-customizer-remove').length) return;
-      $('<button type="button" class="button-link-delete aksrt-widget-customizer-remove" aria-label="移除此小工具">移除</button>').appendTo($nav);
-    });
-  }
-
-  function openTransferModal(action, sidebarId) {
-    const $modal = $('#aksrt-widget-transfer-modal');
-    if (!$modal.length) return;
-    const sidebars = config.sidebars || {};
-    const areaName = sidebars[sidebarId] || sidebarId;
-    $modal.find('.aksrt-widget-transfer-modal__area').text(areaName);
-    $modal.find('input[name="sidebar"], input[name="target_sidebar"]').val(sidebarId);
-    $modal.find('[data-transfer-tab]').removeClass('is-active');
-    $modal.find(`[data-transfer-tab="${action}"]`).addClass('is-active');
-    $modal.find('[data-transfer-panel]').prop('hidden', true);
-    $modal.find(`[data-transfer-panel="${action}"]`).prop('hidden', false);
-    $modal.prop('hidden', false).addClass('is-open').attr('aria-hidden', 'false');
-    $modal.find('[data-transfer-panel="' + action + '"] button, [data-transfer-panel="' + action + '"] input, [data-transfer-panel="' + action + '"] select').filter(':visible').first().trigger('focus');
-  }
-
-  function closeTransferModal() {
-    $('#aksrt-widget-transfer-modal').removeClass('is-open').attr('aria-hidden', 'true').prop('hidden', true);
-  }
-
   function loadForm(container) {
     const $container = $(container);
     if ($container.data('loading') || $container.data('loaded')) return;
@@ -138,7 +61,8 @@
     const number = core.resolveWidgetNumber(inputName, $widget.attr('id'), $container.data('widget-number'));
     // New-widget templates use __i__ until WordPress assigns a real instance number.
     if (!number) return;
-    $container.data('loading', true).find('.aksrt-widget-form-lazy__status').text(config.i18n?.loading || 'Loading…');
+    $container.data('loading', true);
+    setLazyStatus($container, 'loading', config.i18n?.loading || '正在加载模块配置…');
     $.post(config.ajaxUrl, {
       action: config.action,
       nonce: config.nonce,
@@ -146,17 +70,25 @@
       widget_number: number,
     }).done((response) => {
       if (!response?.success || !response.data?.html) {
-        $container.data('loading', false).find('.aksrt-widget-form-lazy__status').text(response?.data?.message || config.i18n?.error || 'Failed to load.');
+        $container.data('loading', false);
+        setLazyStatus($container, 'error', response?.data?.message || config.i18n?.error || '加载失败，请刷新页面后重试');
         return;
       }
       const $form = $(response.data.html);
-      $container.replaceWith($form);
+      $container.data('loaded', true).replaceWith($form);
       initForm($form);
-    }).fail(() => {
-      $container.data('loading', false).find('.aksrt-widget-form-lazy__status').text(config.i18n?.error || 'Failed to load.');
+    }).fail((xhr) => {
+      $container.data('loading', false);
+      setLazyStatus($container, 'error', xhr?.responseJSON?.data?.message || config.i18n?.error || '加载失败，请刷新页面后重试');
     });
   }
 
+  /* Lazy placeholder status uses the reference t-notice box (t-loading / t-error). */
+  function setLazyStatus($container, type, message) {
+    const $notice = $('<div class="t-notice"></div>').addClass(`t-${type}`).text(message);
+    $container.find('.aksrt-widget-form-lazy__status').empty().append($notice);
+  }
+
   function renumberRepeaters(_event, ui) {
     const $form = $(ui?.item || this).closest('.aksrt-widget-form');
     $form.find('.aksrt-widget-repeater__rows').each(function () {
@@ -216,24 +148,10 @@
   }
 
   $(document)
-    .on('click', '[data-aksrt-transfer-action]', function () {
-      openTransferModal(String($(this).data('aksrt-transfer-action')), String($(this).data('sidebar-id')));
+    .on('click', '.widget-top', function () {
+      const $widget = $(this).closest('.widget, .customize-control-widget_form');
+      window.setTimeout(() => $widget.find('.aksrt-widget-form-lazy').each(function () { loadForm(this); }), 20);
     })
-    .on('click', '[data-aksrt-transfer-close]', closeTransferModal)
-    .on('click', '[data-transfer-tab]', function () {
-      const $modal = $(this).closest('.aksrt-widget-transfer-modal');
-      const panel = String($(this).data('transfer-tab'));
-      $modal.find('[data-transfer-tab]').removeClass('is-active');
-      $(this).addClass('is-active');
-      $modal.find('[data-transfer-panel]').prop('hidden', true);
-      $modal.find(`[data-transfer-panel="${panel}"]`).prop('hidden', false);
-    })
-    .on('click', '.aksrt-widget-customizer-remove', function (event) {
-      event.preventDefault();
-      $(this).closest('.customize-control-widget_form').find('.widget-control-remove').first().trigger('click');
-    })
-    .on('click', '.aksrt-widget-form-lazy__load', function () { loadForm($(this).closest('.aksrt-widget-form-lazy')); })
-    .on('click', '.widget.open .aksrt-widget-form-lazy, .customize-control-widget_form .aksrt-widget-form-lazy', function () { loadForm(this); })
     .on('change input', '.aksrt-widget-form input, .aksrt-widget-form select, .aksrt-widget-form textarea', function () {
 		const $form = $(this).closest('.aksrt-widget-form');
 		evaluateDependencies($form);
@@ -300,31 +218,10 @@
       const $wrap = $(this).closest('.aksrt-widget-upload');
       $wrap.find('input[type="url"]').val('').trigger('change');
       $wrap.find('img').remove();
-    })
-	.on('click', '.aksrt-widget-template-preview', function () {
-		const $form = $(this).closest('form');
-		const $output = $('.aksrt-widget-template-preview-output').first();
-		$output.prop('hidden', false).html('<p>正在生成预览…</p>');
-		$.post(config.ajaxUrl, {
-			action: 'aksrt_widgets_template_preview',
-			nonce: config.transferNonce,
-			template: $form.find('[name="template"]').val(),
-		}).done((response) => {
-			if (!response?.success || !response.data) {
-				$output.empty().append($('<p class="notice notice-error"></p>').text(response?.data?.message || config.i18n?.error || '预览加载失败，请重试。'));
-				return;
-			}
-			$output.html(response.data.html || '<p>模板为空。</p>');
-		}).fail((xhr) => {
-			const message = xhr?.responseJSON?.data?.message || config.i18n?.error || '预览加载失败，请重试。';
-			$output.empty().append($('<p class="notice notice-error"></p>').text(message));
-		});
-	});
+    });
 
   $(document).on('widget-added widget-updated', function (_event, widget) {
     $(widget).find('.aksrt-widget-form-lazy').each(function () { loadForm(this); });
-	updatePlacementWarning(widget);
-	scanWidgetAreas();
   });
 
   if (window.wp?.customize?.bind) {
@@ -332,7 +229,6 @@
       $('#customize-theme-controls').on('expanded', function (_event, section) {
         if (!section || !String(section.id || section).includes('sidebar-widgets')) return;
         window.setTimeout(function () {
-          scanWidgetAreas();
           $('.customize-control-widget_form .aksrt-widget-form-lazy').each(function () { loadForm(this); });
         }, 100);
       });
@@ -340,10 +236,6 @@
   }
 
   $(function () {
-    scanWidgetAreas();
-    $(document).on('keydown', function (event) {
-      if (event.key === 'Escape') closeTransferModal();
-    });
     $('.aksrt-widget-form').each(function () { initForm(this); });
     $('.widget.open .aksrt-widget-form-lazy').each(function () { loadForm(this); });
   });