The tile list in the tilemap section is a palette of pictures: each tile shows its lone tile (the four convex corners for floor and wall, the picture itself for none) with its name below, laid out with the image-picker grid (#139)

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

src/editor/debugHook.ts

@@ -559,9 +559,13 @@ export function installDebugHook(app: Application, state: EditorState, editor: E
         const button = currentTilemapSection()?.tools.get(tool as TilemapTool);
         return button ? centreOf(button) : null;
       },
-      tileButtonAt: (assetId: string) => {
-        const button = currentTilemapSection()?.tiles.get(assetId);
-        return button ? centreOf(button) : null;
+      tileButtonAt: (assetId: string) =>
+        currentTilemapSection()?.palette?.swatchGlobal(assetId)?.centre ?? null,
+      /** A tile's box in the palette: its centre, where its picture sits and the palette's columns (#139). */
+      tileSwatch: (assetId: string) => {
+        const palette = currentTilemapSection()?.palette;
+        const swatch = palette?.swatchGlobal(assetId);
+        return palette && swatch ? { ...swatch, columns: palette.columns } : null;
       },
       addLayerAt: () => {
         const button = currentTilemapSection()?.addLayer;