Open a TaskStream board for a project that has none yet

The project form gets «Crear en TaskStream» while the project has no
board, and `taskstream: true` on a PATCH does the same through the API.
A refusal leaves the edit unsaved; a project with a board keeps it, and
`taskstream_key` without the flag is still ignored.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

app/Actions/Projects/OpenInTaskStream.php

@@ -13,11 +13,11 @@ use Illuminate\Validation\ValidationException;
 use Symfony\Component\HttpKernel\Exception\HttpException;
 
 /**
- * Opens a board in TaskStream for a project that is about to be created
- * here, and points the project at it.
+ * Opens a board in TaskStream for a project, new or one without a board
+ * yet, and points the project at it.
  *
  * It runs before the project is saved: if TaskStream says no, nothing is
- * created here either, and the caller gets the reason to fix and retry.
+ * saved here either, and the caller gets the reason to fix and retry.
  * The board is public, like the project it tracks is meant to be.
  */
 class OpenInTaskStream