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>

tests/Feature/AdminPlatformOrderIndexLeadIdFilterFormFieldTest.php

@@ -0,0 +1,42 @@
+<?php
+
+namespace Tests\Feature;
+
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class AdminPlatformOrderIndexLeadIdFilterFormFieldTest extends TestCase
+{
+    use RefreshDatabase;
+
+    protected function loginAsPlatformAdmin(): void
+    {
+        $this->seed();
+
+        $this->post('/admin/login', [
+            'email' => 'platform.admin@demo.local',
+            'password' => 'Platform@123456',
+        ])->assertRedirect('/admin');
+    }
+
+    public function test_index_should_render_lead_id_filter_field(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        $res = $this->get('/admin/platform-orders');
+        $res->assertOk();
+
+        $res->assertSee('name="lead_id"', false);
+        $res->assertSee('线索ID', false);
+    }
+
+    public function test_index_should_render_lead_context_badge_when_filtered(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        $res = $this->get('/admin/platform-orders?lead_id=12');
+        $res->assertOk();
+
+        $res->assertSee('当前线索：#12', false);
+    }
+}