fix(offline): unify NewGame layout to natural-flow + PinPad verdict pause

- NewGame: all three forms (quick / friends / hotseat) now use the
  Profile sub-view's natural-flow .page (no forced height, no pinned-CTA
  .grow/.fg scroll), so the screen's single .content scroll + --vvh handle
  overflow and a focused name input scrolls into view cleanly — fixes the
  keyboard blank-space / deep-scroll regression. One layout rule, one place.
- PinPad: pause 250ms after the 4th digit before the verdict, so the fill
  (and the shake on a wrong PIN) reads as a deliberate response.
- e2e: typePin waits for empty dots before typing (robust to the pause).

ui/src/components/PinPad.svelte

@@ -72,6 +72,9 @@
   async function commit(): Promise<void> {
     busy = true;
     try {
+      // Let the 4th dot register before the verdict: a beat so the fill (and, on failure, the shake)
+      // reads as a deliberate response rather than an instant flicker.
+      await new Promise((r) => setTimeout(r, 250));
       if (phase === 'old') {
         if (verify && (await verify(buffer))) {
           buffer = '';