fix(vip): add spacing before points exchange notice

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

src/Content/VipServiceModal.php

@@ -250,7 +250,7 @@ trait VipServiceModal {
         // （参考主题源码写作 `!$min_val > $user_points`，因运算符优先级恒假，
         //  此处按其原意取真实比较，保证提示分支可达。）
         if ($min_points > $user_points) {
-            $form = '<div class="badg c-red btn-block">' . esc_html__('积分不足，暂时无法兑换', 'aksrt') . '</div>';
+            $form = '<div class="mt20"><div class="badg c-red btn-block">' . esc_html__('积分不足，暂时无法兑换', 'aksrt') . '</div></div>';
         } else {
             $form = '<div class="mt20">'
                 . '<input type="hidden" name="product_id" value="' . $first_package_id . '">'

tests/widget-system/vip-points-exchange-modal.test.cjs

@@ -66,7 +66,9 @@ test('弹窗内容保持参考主题结构：标题/我的积分/卡片选择/
   assert.match(modal, /name="action" value="points_initiate_pay"/);
   assert.match(modal, /mt6 but jb-yellow btn-block radius padding-lg/);
   assert.match(modal, /data-aksrt-vip-points-submit/);
-  assert.match(modal, /badg c-red btn-block/);
+  // CTA 与积分不足状态都从卡片选择区留出 20px 上间距，避免状态切换时布局贴紧。
+  assert.match(modal, /\$form = '<div class="mt20">'/);
+  assert.match(modal, /'<div class="mt20"><div class="badg c-red btn-block">'/);
 });
 
 test('弹窗壳随 wp_footer 全局输出且不进入 catalog 载荷', () => {