hide: disable puzzle mode from editor without removing code

Comment out initPuzzleUI() call and remove puzzle_door from
interaction type dropdown — all puzzle code remains intact for
future re-enablement.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

js/app.js

@@ -14,7 +14,7 @@ document.addEventListener('DOMContentLoaded', () => {
         () => {
             initRenderer();
             initEvents();
-            initPuzzleUI();
+            // initPuzzleUI(); // HIDDEN: puzzle mode disabled for now
             if (loadFromStorage()) {
                 updateComponentButtons();
                 evaluateAll();