feat(pay): sales volume, paid order meta, pending resume, limit-over buy

Bump content sales on resource order paid; show order number/time in download
box; poll pending gateway payments; support download_limit_over_price overbuy.

inc/classes/class-aksrt-resource-meta-box.php

@@ -299,6 +299,14 @@ class AKSRT_Resource_Meta_Box {
                     </div>
                 </div>
 
+                <div class="aksrt-pmb__row">
+                    <label for="aksrt_pay_limit_over_price"><?php esc_html_e('超额下载补价', 'aksrt'); ?></label>
+                    <div>
+                        <input type="number" id="aksrt_pay_limit_over_price" name="aksrt_pay_limit_over_price" value="<?php echo esc_attr((string) ($meta['download_limit_over_price'] ?? 0)); ?>" min="0" step="0.01">
+                        <p class="aksrt-pmb__hint"><?php esc_html_e('免费日限额用尽后允许购买的补价（现金/积分随支付方式）。0 = 不允许超额购买。对齐 zibll download_limit_over_price。', 'aksrt'); ?></p>
+                    </div>
+                </div>
+
                 <div class="aksrt-pmb__row">
                     <label for="aksrt_pay_stock"><?php esc_html_e('库存', 'aksrt'); ?></label>
                     <div>
@@ -497,6 +505,7 @@ class AKSRT_Resource_Meta_Box {
             'card_keys'       => isset($_POST['aksrt_pay_card_keys']) ? array_filter(array_map('trim', explode("\n", (string) $_POST['aksrt_pay_card_keys']))) : [],
             'free_preview'    => $_POST['aksrt_pay_free_preview'] ?? '',
             'show_sales'      => !empty($_POST['aksrt_pay_show_sales']),
+            'download_limit_over_price' => max(0, (float) ($_POST['aksrt_pay_limit_over_price'] ?? 0)),
         ]);
 
         update_post_meta($post_id, AKSRT_Domain_Model::PAY_META_KEY, $pay_meta);