平台订单详情：同步失败卡片补集合链接（failed/同原因）+测试

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

@@ -576,6 +576,21 @@
         @endif
     </div>
     @if($activationError)
+        @php
+            $syncMsg = (string) (data_get($activationError, 'message') ?? '');
+            $syncFailedListUrl = $makePlatformOrderIndexUrl(['sync_status' => 'failed']);
+
+            // 避免 URL 过长/特殊字符破坏 query：失败原因过长时不生成 keyword 链接
+            $SYNC_REASON_KEYWORD_MAX_LEN = 80;
+            $syncReasonUrl = '';
+            if ($syncMsg !== '' && mb_strlen($syncMsg) <= $SYNC_REASON_KEYWORD_MAX_LEN) {
+                $syncReasonUrl = $makePlatformOrderIndexUrl([
+                    'sync_status' => 'failed',
+                    'sync_error_keyword' => $syncMsg,
+                ]);
+            }
+        @endphp
+
         <table>
             <tbody>
             <tr><th class="w-160">失败原因</th><td>{{ data_get($activationError, 'message') }}</td></tr>
@@ -583,6 +598,16 @@
             <tr><th>操作管理员</th><td>{{ data_get($activationError, 'admin_id') ?: '-' }}</td></tr>
             </tbody>
         </table>
+
+        <div class="mt-10 actions gap-10">
+            <a class="btn btn-secondary btn-sm" href="{!! $syncFailedListUrl !!}">查看同步失败订单</a>
+            @if($syncReasonUrl)
+                <a class="btn btn-secondary btn-sm" href="{!! $syncReasonUrl !!}">查看同原因失败订单</a>
+            @else
+                <span class="muted muted-xs">原因过长，请复制到列表页筛选框</span>
+            @endif
+        </div>
+
         <div class="muted muted-xs mt-6">提示：当你已确认问题已解决，但历史失败标记仍残留时，可先清理标记，再点击上方「重试同步订阅」。</div>
     @else
         <p class="muted">暂无失败记录。</p>