[api] handle no latest

app/Http/Controllers/NewsController.php

@@ -7,6 +7,7 @@ use App\Models\News;
 use App\Repositories\NewsRepository;
 use Carbon\Carbon;
 use Illuminate\Http\Request;
+use Illuminate\Http\Resources\Json\JsonResource;
 use Illuminate\Support\Facades\Auth;
 use Illuminate\Validation\Rule;
 use Nexus\Database\NexusDB;
@@ -104,10 +105,15 @@ class NewsController extends Controller
     {
         $user = Auth::user();
         $result = News::query()->orderBy('id', 'desc')->first();
-        $resource = new NewsResource($result);
+        if ($result) {
+            $resource = new NewsResource($result);
+        } else {
+            $resource = new JsonResource(null);
+        }
         $resource->additional([
             'site_info' => site_info(),
         ]);
+
         /**
          * Visiting the home page is the same as viewing the latest news
          * @see functions.php line 2590

app/Http/Controllers/PollController.php

@@ -6,6 +6,7 @@ use App\Http\Resources\PollResource;
 use App\Models\Poll;
 use App\Repositories\PollRepository;
 use Illuminate\Http\Request;
+use Illuminate\Http\Resources\Json\JsonResource;
 use Illuminate\Support\Facades\Auth;
 use Illuminate\Validation\Rule;
 
@@ -96,7 +97,6 @@ class PollController extends Controller
     }
 
     /**
-     * @todo 弃权选项
      * @return array
      */
     public function latest()
@@ -130,9 +130,11 @@ class PollController extends Controller
             foreach ($answerStats as $index => &$value) {
                 $value = number_format(($value / $poll->answers_count) * 100, 2) . '%';
             }
+            $resource = new PollResource($poll);
+        } else {
+            $resource = new JsonResource(null);
         }
 
-        $resource = new PollResource($poll);
         $resource->additional([
             'selection' => $selection,
             'answer_stats' => $answerStats,