feat: dashboard plans link should carry back

resources/views/admin/dashboard.blade.php

@@ -178,7 +178,10 @@
     <div class="card">
         <div class="flex-between">
             <h3 class="mt-0">套餐订单占比（Top5）</h3>
-            <a class="muted" href="/admin/plans">查看套餐</a>
+            @php
+                $plansIndexUrl = \App\Support\BackUrl::withBack('/admin/plans', $selfWithoutBack);
+            @endphp
+            <a class="muted" href="{!! $plansIndexUrl !!}">查看套餐</a>
         </div>
 
         @php

tests/Feature/AdminDashboardPlanOrderShareViewPlansLinkShouldCarryBackTest.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace Tests\Feature;
+
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class AdminDashboardPlanOrderShareViewPlansLinkShouldCarryBackTest 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_dashboard_plan_order_share_view_plans_link_should_carry_back(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        $res = $this->get('/admin');
+        $res->assertOk();
+
+        $res->assertSee('href="/admin/plans?back=%2Fadmin"', false);
+        $res->assertDontSee('&amp;back=', false);
+    }
+}