feat(admin): pending shipment board with immediate ship actions

Add paid-but-unshipped order queue on the shipping page (zibll-style),
repository query via NOT EXISTS on order_shipping, overview pending card,
and create-shipping redirect back to the pending tab.

inc/classes/class-aksrt-order-repository.php

@@ -348,6 +348,63 @@ class AKSRT_Order_Repository {
     /**
      * 管理后台订单列表 — 支持 search（order_number / product_type 模糊匹配）
      */
+    /**
+     * Paid orders that still need shipping (no shipping row yet).
+     *
+     * @return array{items: array<int,array<string,mixed>>, total: int, page: int, max_pages: int}
+     */
+    public function get_pending_shipment_orders(array $args = []): array {
+        global $wpdb;
+
+        $limit  = max(1, min(100, (int) ($args['limit'] ?? 20)));
+        $offset = max(0, (int) ($args['offset'] ?? 0));
+        $search = sanitize_text_field((string) ($args['search'] ?? $args['s'] ?? ''));
+
+        $order_table = $this->table();
+        // Must match AKSRT_Shipping::table() key.
+        $shipping_table = class_exists('AKSRT_DB_Migrator')
+            ? AKSRT_DB_Migrator::table('order_shipping')
+            : $wpdb->prefix . 'aksrt_order_shipping';
+
+        $where = ["o.status = %s"];
+        $params = ['paid'];
+
+        if ($search !== '') {
+            $where[] = '(o.order_number LIKE %s OR o.product_type LIKE %s)';
+            $like = '%' . $wpdb->esc_like($search) . '%';
+            $params[] = $like;
+            $params[] = $like;
+        }
+
+        // NOT EXISTS avoids ONLY_FULL_GROUP_BY issues from LEFT JOIN + GROUP BY.
+        $where[] = "NOT EXISTS (
+            SELECT 1 FROM {$shipping_table} s
+            WHERE s.order_number = o.order_number
+        )";
+        $where_sql = 'WHERE ' . implode(' AND ', $where);
+
+        $count_sql = "SELECT COUNT(*) FROM {$order_table} o {$where_sql}";
+        $total = (int) $wpdb->get_var($wpdb->prepare($count_sql, $params));
+
+        $sql = "SELECT o.*
+            FROM {$order_table} o
+            {$where_sql}
+            ORDER BY COALESCE(o.paid_at, o.created_at) DESC, o.id DESC
+            LIMIT %d OFFSET %d";
+        $query_params = $params;
+        $query_params[] = $limit;
+        $query_params[] = $offset;
+        $rows = $wpdb->get_results($wpdb->prepare($sql, $query_params), ARRAY_A);
+        $items = array_map([$this, 'normalize_row'], (array) $rows);
+
+        return [
+            'items'     => $items,
+            'total'     => $total,
+            'page'      => (int) floor($offset / $limit) + 1,
+            'max_pages' => (int) ceil(max(1, $total) / $limit),
+        ];
+    }
+
     public function get_orders_admin(array $args = [], string $search = ''): array {
         global $wpdb;