补齐套餐详情页订阅治理回链测试

tests/Feature/AdminPlanShowTest.php

@@ -364,5 +364,47 @@ class AdminPlanShowTest extends TestCase
         $res->assertDontSee('back=' . $unsafeBack, false);
         $res->assertDontSee('back%3D', false);
     }
+
+    public function test_plan_show_should_render_safe_back_but_subscription_governance_links_should_still_use_plan_show_self_back(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        $plan = Plan::query()->create([
+            'code' => 'plan_show_subscription_governance_safe_back_test',
+            'name' => '套餐详情订阅治理入口 safe back 测试套餐',
+            'billing_cycle' => 'monthly',
+            'price' => 96,
+            'list_price' => 126,
+            'status' => 'active',
+            'sort' => 10,
+        ]);
+
+        $safeBack = '/admin/plans?' . Arr::query([
+            'status' => 'active',
+            'keyword' => '订阅治理',
+        ]);
+
+        $res = $this->get('/admin/plans/' . $plan->id . '?back=' . urlencode($safeBack));
+        $res->assertOk();
+
+        $res->assertSee('href="' . $safeBack . '"', false);
+        $res->assertSee('返回上一页（保留上下文）');
+
+        $planShowSelf = '/admin/plans/' . $plan->id;
+
+        $expectedSubscriptionsUrl = '/admin/site-subscriptions?' . Arr::query([
+            'plan_id' => $plan->id,
+            'back' => $planShowSelf,
+        ]);
+        $expectedExpiringSubscriptionsUrl = '/admin/site-subscriptions?' . Arr::query([
+            'plan_id' => $plan->id,
+            'expiry' => 'expiring_7d',
+            'back' => $planShowSelf,
+        ]);
+
+        $res->assertSee($expectedSubscriptionsUrl, false);
+        $res->assertSee($expectedExpiringSubscriptionsUrl, false);
+        $res->assertDontSee('back=' . $safeBack, false);
+    }
 }