Fix missing leading slash in player's initial working directory

Every possible path/file in GameResponseService uses a leading slash
(e.g. /var/home/{username}), but a player's initial pwd was seeded as
'var/home/{username}' without one. getAllCurrentFilesInDirectory()
matches entries by comparing getPrevPath() (which always has the
leading slash) against pwd, so a fresh player's ls always came back
empty until their first cd command happened to normalize the format.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/Game/Service/GameDashboardService.php

@@ -202,7 +202,7 @@ final class GameDashboardService
             $setting->setSession($player->getSession());
             $setting->setPlayer($player);
             $setting->setName($pwdSettingName);
-            $setting->setValue('var/home/' . $player->getUser()->getUsername());
+            $setting->setValue('/var/home/' . $player->getUser()->getUsername());
             $this->entityManager->persist($setting);
         }