0.2.6-dev: a piece has no screen rect until it is first drawn — pieceScreenRect returned a just-built view's unprojected (0, 0) record, so a browser test grabbed a piece bought that frame at the canvas corner (the intermittent .fwheel__dia timeout in coop.e2e / real.e2e); the tests' piecePoint waits for a drawn piece that holds still; golden: unchanged

public/js/render/app.js

@@ -47,6 +47,7 @@
 //        a special terrain tile's own tip; the screen resolves it with gameLogic.terrainInfo)
 //        tileHover { row, col, area, idx } | null (while dragging: the drop target — the tile under the pointer)
 //   view.pieceScreenRect(uid) → { left, top, right, bottom, width, height, x, y } (client px: the drawn body) | null
+//                               (null also until the piece is first drawn)
 // Picking (user playtest #4 item 1: the ground is drawn as tiles — a press on a tile is a press on the unit standing
 // there): every "which unit is under the pointer" — prep press / click / detail / drag start / hover (pieceAt), battle
 // clicks and hover (battleUnitAt), the pen (penUnitAt) — is render/pick.js over the tile under the pointer (groundTile:
@@ -1939,7 +1940,8 @@ export async function createFieldView(host, options = {}) {
     pieceScreenRect(uid) {
       let v = views.get('p:' + uid);
       if (!v) for (const x of views.values()) if (x.uid === uid || x.info?.uid === uid || x.id === uid) { v = x; break; }
-      if (!v || v.destroyed) return null;
+      // a view built this frame is placed by its first update: before that its screen record is still (0, 0)
+      if (!v || v.destroyed || !v.placed) return null;
       const b = v.bounds();
       const r = canvas.getBoundingClientRect();
       const left = r.left + b.x, top = r.top + b.y;