feat(plans): add cross links in summary cards

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

@@ -139,18 +139,27 @@
         <div class="num-md">
             <a class="link" href="{!! $safeFullUrlWithQuery(['status' => 'active', 'page' => null]) !!}">{{ $summaryStats['active_plans'] ?? 0 }}</a>
         </div>
+        <div class="muted muted-xs">
+            <a class="link" href="{!! $safeFullUrlWithQuery(['status' => 'inactive', 'page' => null]) !!}">查看停用套餐</a>
+        </div>
     </div>
     <div class="card">
         <h3>月付套餐</h3>
         <div class="num-md">
             <a class="link" href="{!! $safeFullUrlWithQuery(['billing_cycle' => 'monthly', 'page' => null]) !!}">{{ $summaryStats['monthly_plans'] ?? 0 }}</a>
         </div>
+        <div class="muted muted-xs">
+            <a class="link" href="{!! $safeFullUrlWithQuery(['billing_cycle' => 'yearly', 'page' => null]) !!}">查看年付套餐</a>
+        </div>
     </div>
     <div class="card">
         <h3>年付套餐</h3>
         <div class="num-md">
             <a class="link" href="{!! $safeFullUrlWithQuery(['billing_cycle' => 'yearly', 'page' => null]) !!}">{{ $summaryStats['yearly_plans'] ?? 0 }}</a>
         </div>
+        <div class="muted muted-xs">
+            <a class="link" href="{!! $safeFullUrlWithQuery(['billing_cycle' => 'monthly', 'page' => null]) !!}">查看月付套餐</a>
+        </div>
     </div>
     <div class="card">
         <h3>关联订阅总量</h3>

tests/Feature/AdminPlanIndexSummaryCardsCrossLinksTest.php

@@ -0,0 +1,35 @@
+<?php
+
+namespace Tests\Feature;
+
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class AdminPlanIndexSummaryCardsCrossLinksTest 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_summary_cards_should_have_cross_links_for_quick_navigation(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        $this->get('/admin/plans')
+            ->assertOk()
+            ->assertSee('查看停用套餐')
+            ->assertSee('查看年付套餐')
+            ->assertSee('查看月付套餐')
+            ->assertSee('status=inactive', false)
+            ->assertSee('billing_cycle=monthly', false)
+            ->assertSee('billing_cycle=yearly', false);
+    }
+}