feat(platform): 线索/订单页增加 back 与来源线索上下文提示

tests/Feature/AdminPlatformLeadIndexBackLinkNotEscapedTest.php

@@ -0,0 +1,43 @@
+<?php
+
+namespace Tests\Feature;
+
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Illuminate\Support\Arr;
+use Tests\TestCase;
+
+class AdminPlatformLeadIndexBackLinkNotEscapedTest 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_back_link_with_ampersand_not_escaped(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        $back = '/admin/platform-orders?' . Arr::query([
+            'lead_id' => 12,
+            'payment_status' => 'paid',
+        ]);
+
+        $url = '/admin/platform-leads?' . Arr::query([
+            'back' => $back,
+        ]);
+
+        $res = $this->get($url);
+        $res->assertOk();
+
+        $res->assertSee('← 返回上一页（保留上下文）', false);
+        $res->assertSee('href="' . $back . '"', false);
+        $res->assertDontSee('&amp;', false);
+    }
+}