Tilemaps are a new placeable asset type that is painted with autotiles in the scene view, with layers, brush, eraser and rectangle, and is drawn at runtime and in the export (#128)

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

tools/e2e/lib/scaffold.mjs

@@ -20,6 +20,7 @@ export const LANES = {
   font: -1900,
   particles: -2300,
   sound: -2700,
+  tilemap: -3100,
 };
 
 /**
@@ -124,11 +125,24 @@ export const TAB_LABELS = {
  * nothing and took the whole suite down with it.
  */
 export async function openTab(t, tab) {
+  const label = TAB_LABELS[tab];
   const row = await t.json('__gm.tabRow()');
   if (row.hidden.includes(tab)) {
     await t.clickText('»');
+    await t.clickText(label);
+    return;
   }
-  await t.clickText(TAB_LABELS[tab]);
+  // The label alone is not the tab: the toolbar labels its scene selector "Scene" too, and being
+  // drawn first that is what `clickText` had been hitting – so the tab stayed where it was
+  // (measured 2026-09-17: step 39 ended on the Autotile tab although it asks for the Scene tab).
+  // The hit is therefore picked by the box the tab row reports for that tab.
+  const entry = row.shown.find((e) => e.tab === tab);
+  const hits = entry ? await t.json(`__gm.locateAll(${JSON.stringify(label)})`) : [];
+  const hit = hits.find(
+    (p) => p.x >= entry.x && p.x <= entry.right && p.y >= entry.y && p.y <= entry.y + entry.h,
+  );
+  if (hit) await t.click(hit.x, hit.y);
+  else await t.clickText(label);
 }
 
 /**