feat(profile): align settings with dashboard layout

app/Http/Requests/Profile/UpdateProfileRequest.php

@@ -0,0 +1,47 @@
+<?php
+
+namespace App\Http\Requests\Profile;
+
+use App\Models\User;
+use Illuminate\Foundation\Http\FormRequest;
+use Illuminate\Validation\Rule;
+
+class UpdateProfileRequest extends FormRequest
+{
+    public function authorize(): bool
+    {
+        return $this->user() !== null;
+    }
+
+    /**
+     * @return array<string, array<mixed>>
+     */
+    public function rules(): array
+    {
+        return [
+            'first_name' => ['required', 'string', 'max:255'],
+            'last_name' => ['required', 'string', 'max:255'],
+            'username' => [
+                'required',
+                'string',
+                'max:255',
+                'alpha_dash',
+                function ($attribute, $value, $fail): void {
+                    if (User::whereKeyNot($this->user()->getKey())
+                        ->whereRaw('LOWER(username) = ?', [strtolower($value)])
+                        ->exists()) {
+                        $fail('The username has already been taken.');
+                    }
+                },
+            ],
+            'email' => [
+                'required',
+                'string',
+                'lowercase',
+                'email',
+                'max:255',
+                Rule::unique(User::class)->ignore($this->user()->getKey()),
+            ],
+        ];
+    }
+}