feat: add beacon nexus portal slice (#167)

js/engine.js

@@ -537,7 +537,7 @@ function renderBeaconEnding() {
             Clicks: ${G.totalClicks}<br>
             Time Played: ${Math.floor((Date.now() - G.startedAt) / 60000)} minutes
         </div>
-        <button onclick="if(confirm('Start over? The old save will be lost.')){localStorage.removeItem('the-beacon-v2');location.reload()}" 
+        <button onclick="if(confirm('Start over? The old save will be lost.')){clearBeaconSaveAndReload()}" 
             style="margin-top:20px;background:#1a0808;border:1px solid #ffd700;color:#ffd700;padding:10px 24px;border-radius:4px;cursor:pointer;font-family:inherit;font-size:11px;opacity:0;transition:opacity 1s ease 3.5s">
             PLAY AGAIN
         </button>