Mock SatisService in plugin OG image deletion test

The plugin deleting hook resolves SatisService, whose constructor assigns
the (string-typed) api key from config. In CI SATIS_API_KEY is unset, so
the null config value triggered a TypeError. Mock the service in the
deletion test (matching existing Satis test conventions) since the test
only exercises OG image cleanup.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: simonhamp

tests/Feature/PluginOgImageTest.php

@@ -6,6 +6,7 @@
 use App\Models\Plugin;
 use App\Services\PluginOgLayout;
 use App\Services\PluginSyncService;
+use App\Services\SatisService;
 use Illuminate\Foundation\Testing\RefreshDatabase;
 use Illuminate\Support\Facades\Http;
 use Illuminate\Support\Facades\Queue;
@@ -117,6 +118,11 @@ public function test_deleting_plugin_removes_its_og_image(): void
     {
         Storage::fake('public');
 
+        // The plugin's deleting hook also talks to Satis, which we don't exercise here.
+        $this->mock(SatisService::class)
+            ->shouldReceive('removePackage')
+            ->andReturn([]);
+
         $plugin = Plugin::factory()->approved()->create([
             'og_image' => 'https://nativephp.com.test/storage/og-images/plugins/42.png',
         ]);