pass user object to create text use case

drop UserRepository dependency; controller now passes the
authenticated User directly via CreateTextRequest, eliminating
a redundant repository lookup.

app/Text/UseCases/CreateTextRequest.php

@@ -2,9 +2,12 @@
 
 namespace App\Text\UseCases;
 
+use App\User\User;
+
 class CreateTextRequest
 {
     public function __construct(
         public ?string $name,
+        public ?User $user,
     ) {}
 }