[RELEASE] MakeCode publish + smoke test on fresh browser

[DickHorner]

Goal

Share-Link läuft stabil auf fremdem Browser.

Tasks

• publish
• open on clean browser/device
• quick smoke: start → hub → 1 dungeon → return → save/load

Acceptance Criteria

• link funktioniert, keine regressions

Test Evidence

• link + notes

Dependencies: #43