fix: wrap plugin_settings index response in data key for trmnlp compatibility

The trmnlp APIClient unwraps a 'data' key from the response body, but
PluginSettingsController#index was returning a bare JSON array, causing
`trmnlp list` to always show "No plugins found." Update the controller
and corresponding test to use the `{'data': [...]}` envelope.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitignore

@@ -45,3 +45,6 @@ yarn-error.log
 /.github/skills
 /docs/site
 /docs/node_modules
+/.envrc
+/.direnv
+

app/Http/Controllers/Api/PluginSettingsController.php

@@ -34,7 +34,7 @@ class PluginSettingsController extends Controller
                 'plugin_id' => null,
             ]);
 
-        return response()->json($plugins);
+        return response()->json(['data' => $plugins]);
     }
 
     public function store(Request $request): JsonResponse

tests/Feature/Api/PluginSettingsTest.php

@@ -33,7 +33,7 @@ it('GET /api/plugin_settings returns all user plugins with null plugin_id', func
     $response = $this->getJson('/api/plugin_settings');
 
     $response->assertOk();
-    $data = $response->json();
+    $data = $response->json('data');
     expect($data)->toHaveCount(2);
     expect($data[0])->toMatchArray(['id' => 'uuid-1', 'name' => 'Alpha', 'plugin_id' => null]);
     expect($data[1])->toMatchArray(['id' => 'uuid-2', 'name' => 'Beta', 'plugin_id' => null]);