feat(admin): 平台订单筛选增加线索ID（lead_id）与上下文提示

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

@@ -40,7 +40,16 @@
 
     @php
         $currentSubscription = $currentSubscription ?? null;
+        $incomingLeadId = (int) request()->query('lead_id', 0);
     @endphp
+
+    @if($incomingLeadId > 0)
+        <div class="mt-10">
+            <span class="badge">当前线索：#{{ $incomingLeadId }}</span>
+            <span class="muted muted-xs">（已按 lead_id 过滤订单集合）</span>
+        </div>
+    @endif
+
     @if($currentSubscription && $currentSubscription->id)
         <div class="mt-10">
             <div class="muted">当前已锁定订阅：</div>
@@ -247,6 +256,7 @@
             <span>只看退款不一致（状态 vs 退款总额）</span>
         </label>
         <input type="text" name="keyword" placeholder="关键词：订单号/站点/订阅号" value="{{ $filters['keyword'] ?? '' }}">
+        <input type="number" name="lead_id" placeholder="线索ID（可选）" value="{{ $filters['lead_id'] ?? '' }}" class="w-140">
         <input type="text" name="sync_error_keyword" placeholder="同步失败原因关键词（可选）" value="{{ $filters['sync_error_keyword'] ?? '' }}">
         <input type="text" name="bmpa_error_keyword" placeholder="批量标记支付并生效失败原因关键词（可选）" value="{{ $filters['bmpa_error_keyword'] ?? '' }}">
         <div>