Loose grains and solid ground look different: a seam on the rock, pebbly lighter grains (t33)

- Smooth look: natural ground gets a soft seam where loose grains meet it; packed grains keep a
  pebble texture and are slightly lighter. Pixel look and thermal lens: the same idea per pixel.
- play.py: the F-on-a-mold toast check records toasts the key press makes instead of counting
  the ones on screen, which failed when an older toast expired at the same moment.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

test/play.py

@@ -695,9 +695,13 @@ with sync_playwright() as p:
     pg.screenshot(path=str(out / '05-mold-ready.png'))
     check('three bars drop below the mold without F', ev('ents.every(e => e.m === BARCU && e.iy >= molds[0].y + molds[0].h)'), ev('ents.map(e => [e.ix, e.iy])'))
     pg.keyboard.press('2'); settle(60)
-    ev("GAME.status = ''; GAME.statusT = 0"); n_toasts = ev("$('toasts').children.length")
-    pg.mouse.move(*cell_to_screen(ev('molds[0].x') + 3, ev('molds[0].y') + 3)); settle(150); pg.keyboard.press('f'); settle(150)
-    check('F on an automatic ingot mold stays quiet without a toast', ev("$('m-dialog').hidden") and ev("$('toasts').children.length") == n_toasts)
+    ev("GAME.status = ''; GAME.statusT = 0")
+    pg.mouse.move(*cell_to_screen(ev('molds[0].x') + 3, ev('molds[0].y') + 3)); settle(150)
+    # count toasts made by the key press itself: counting the ones on screen also caught an older toast expiring
+    ev("window._toastsMade = []; window._toastFn = toast; toast = function (t, o) { _toastsMade.push(t); return _toastFn(t, o); }; 0")
+    pg.keyboard.press('f'); settle(150)
+    made = ev("(() => { toast = _toastFn; return _toastsMade; })()")
+    check('F on an automatic ingot mold stays quiet without a toast', ev("$('m-dialog').hidden") and made == [], made)
     ev("closeModal('m-dialog')")
     check('F with vacuum still uses what is in reach', ev("""(() => {
       $('toasts').innerHTML = '';