small fixing, added throw errors in widgets

app/Http/Controllers/ClientWidgetContactController.php

@@ -19,7 +19,7 @@ class ClientWidgetContactController extends Controller
                 return new ClientContactWidgetResource(
                     ContactWidget::query()
                         ->where('slug', $slug)
-                        ->first()
+                        ->firstOrFail()
                 );
             }
         );

app/Http/Controllers/ClientWidgetFormController.php

@@ -15,7 +15,7 @@ class ClientWidgetFormController extends Controller
 {
     public function single(string $id)
     {
-        return new ClientFormResource(CustomForm::query()->where('status', CustomFormStatus::PUBLISHED)->where('form_id', $id)->first());
+        return new ClientFormResource(CustomForm::query()->where('status', CustomFormStatus::PUBLISHED)->where('form_id', $id)->firstOrFail());
     }
 
     public function submit(int $id, Request $request)

app/Http/Controllers/ClientWidgetPageController.php

@@ -10,7 +10,7 @@ use Illuminate\Support\Facades\Cache;
 
 class ClientWidgetPageController extends Controller
 {
-    public function single(int $id)
+    public function single(int $id): \Illuminate\Http\JsonResponse
     {
         $cacheKey = 'page_' . md5($id);
 
@@ -18,7 +18,7 @@ class ClientWidgetPageController extends Controller
         $page = Cache::remember($cacheKey, now()->addHours(1), function () use ($id) {
             return Page::where('id', '=', $id)
                 ->with('section.pages.section', 'section.mainSection')
-                ->first();
+                ->firstOrFail();
         });
 
         if (isset($page->section)) {

app/Http/Controllers/ClientWidgetPageReferenceListController.php

@@ -19,7 +19,7 @@ class ClientWidgetPageReferenceListController extends Controller
                 return new ClientPageReferenceListResource(
                     PageReferenceList::query()
                         ->where('slug', $slug)
-                        ->first()
+                        ->firstOrFail()
                 );
             }
         );

app/Http/Controllers/ClientWidgetPostController.php

@@ -39,7 +39,7 @@ class ClientWidgetPostController extends Controller
 
         return Cache::remember($cacheKey, now()->addMinutes(10), function () use ($id) {
             return new PostThumbnailResource(
-                Post::query()->with('category')->find($id)
+                Post::query()->with('category')->find($id)->firstOrFail()
             );
         });
     }

app/Http/Controllers/ClientWidgetSliderController.php

@@ -18,7 +18,7 @@ class ClientWidgetSliderController extends Controller
                 ->with(['slides' => function($query) {
                     $query->where('is_active', true);
                 }])
-                ->first();
+                ->firstOrFail();
 
             return $slider ?: null;
         });