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/CreateText.php

@@ -24,9 +24,13 @@ class CreateText
         if ($request->name === null) {
             throw new BadRequestException('name is required');
         }
+        if ($request->user === null) {
+            throw new BadRequestException('user is required');
+        }
 
         $text = $this->textRepo->create(new CreateTextDto(
             name: $request->name,
+            user: $request->user,
         ));
 
         $this->nodeRepo->create(new CreateNodeDto(

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,
     ) {}
 }