add all controllers logic

app/Http/Controllers/Api/Ui/UiController.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace App\Http\Controllers\Api\Ui;
+
+use App\Http\Controllers\Api\BaseApiController;
+use App\Http\Requests\Ui\UiStyleRequest;
+use App\Http\Resources\Ui\UiStyleResource;
+use App\Services\Ui\UiStyleService;
+use Illuminate\Http\JsonResponse;
+use Symfony\Component\HttpFoundation\Response;
+
+class UiController extends BaseApiController
+{
+    public function __construct(private UiStyleService $styleService)
+    {
+        parent::__construct();
+    }
+
+    public function style(UiStyleRequest $request): JsonResponse
+    {
+        $userId = (int) (auth()->id() ?? 0);
+        if ($userId <= 0) {
+            return $this->error('Unauthorized.', Response::HTTP_UNAUTHORIZED);
+        }
+
+        $prefs = $this->styleService->update($userId, $request->validated());
+
+        return $this->success([
+            'preferences' => new UiStyleResource($prefs),
+        ], 'Style updated.');
+    }
+}