restore composer.json, add mysqli extension

app/Models/Problem.php

@@ -0,0 +1,39 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Support\Facades\App;
+
+/**
+ * @package App\Models
+ * @property int $id
+ * @property array $title
+ * @property string $created_at
+ * @property string $updated_at
+ *
+//  * @property UsefulInfoItem[] $items
+ *
+ */
+class Problem extends Model
+{
+    use HasFactory;
+
+    protected $fillable = [
+        'title',
+    ];
+
+    protected $casts = [
+        'title' => 'array',
+    ];
+
+    public function getTitle(): string
+    {
+        if (App::isLocale('ru')) {
+            return (string) $this->title['ru'];
+        }
+
+        return (string) $this->title['uz'];
+    }
+}