Prevent Boxed from resetting player progress on non-Boxed island resets

[Copilot]

Boxed was clearing player advancements/statistics on IslandNewIslandEvent even when the reset originated from a non-Boxed island. This leaked Boxed reset behavior across game modes.

• Event scoping fix

  • Added a world-scope guard in AdvancementListener#onFirstTime to no-op unless the event island belongs to a Boxed world.
  • This keeps reset-side advancement/stat clearing confined to Boxed islands only.

• Regression coverage

  • Added a listener test that simulates IslandNewIslandEvent for a non-Boxed island and asserts the reset flow is not entered (no player UUID access / no clear path trigger).

@EventHandler(priority = EventPriority.NORMAL, ignoreCancelled = true)
public void onFirstTime(IslandNewIslandEvent e) {
    if (addon.getSettings().isIgnoreAdvancements()) return;
    if (!addon.inWorld(e.getIsland().getWorld())) {
        return;
    }
    User user = User.getInstance(e.getPlayerUUID());
    if (user != null) {
        clearAndSetAdv(user, addon.getSettings().isOnJoinResetAdvancements(),
                addon.getSettings().getOnJoinGrantAdvancements());
    }
}

[sonarqubecloud]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
75.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud