Avoid nested back param when generating platform order show links

resources/views/admin/platform_orders/index.blade.php

@@ -8,6 +8,14 @@
     // 失败原因过长时不生成 sync_error_keyword 链接，避免 URL 过长/特殊字符破坏 query
     $SYNC_ERROR_KEYWORD_LINK_MAX_LEN = (int) config('saasshop.platform_orders.sync_error_keyword_link_max_len', 200);
     $SYNC_FAILED_REASON_TRUNCATE_LEN = (int) config('saasshop.platform_orders.sync_failed_reason_display_truncate_len', 60);
+
+    // back 参数用于“返回上一页（保留上下文）”，但 back 本身不应再包含 back（避免无限嵌套导致 URL 膨胀）
+    $currentQuery = request()->query();
+    unset($currentQuery['back']);
+    $selfWithoutBack = '/' . ltrim(request()->path(), '/');
+    if (count($currentQuery) > 0) {
+        $selfWithoutBack .= '?' . \Illuminate\Support\Arr::query($currentQuery);
+    }
 @endphp
 <div class="card mb-20">
     <p class="muted muted-tight">这里是总台视角的平台收费主链骨架页，当前阶段先承接套餐订购 / 续费 / 生效跟踪。</p>
@@ -748,7 +756,7 @@
         @forelse($orders as $order)
             <tr>
                 <td>{{ $order->id }}</td>
-                <td><a href="/admin/platform-orders/{{ $order->id }}?back={{ urlencode(request()->getRequestUri()) }}">{{ $order->order_no }}</a></td>
+                <td><a href="/admin/platform-orders/{{ $order->id }}?back={{ urlencode($selfWithoutBack) }}">{{ $order->order_no }}</a></td>
                 <td>
                     @if($order->merchant)
                         <a href="{!! request()->fullUrlWithQuery(['merchant_id' => $order->merchant->id, 'page' => null]) !!}" class="link">{{ $order->merchant->name }}</a>