fix(ui): local-game history (hide social, keep dictionary); Enter dismisses keyboard; email-code autosubmit

- History drawer in a local (offline) game: the seat plaques no longer
  show the add-friend/block controls — canAddFriend/canBlock now exclude a
  local game (hotseat seats have synthetic account ids that slipped past
  the vs_ai-only guard) — and the Dictionary entry is restored: an active
  hotseat game keeps the comms button, and CommsHub is Dictionary-only for
  a chatless vs_ai OR hotseat game (ChatScreen never mounts offline).
- Enter on any single-line <input> now dismisses the soft keyboard (blur);
  a <textarea> (feedback) keeps Enter for newlines. One global handler.
- Login email code: the friend-code spread-digit style (.codein), a
  6-char cap, auto-submit on the 6th digit, and Enter to submit.
- e2e: the local-game history has no social controls and keeps the
  dictionary entry.

ui/e2e/hotseat.spec.ts

@@ -94,6 +94,13 @@ test.describe('offline hotseat (pass-and-play)', () => {
     await typePin(page, '1234');
     await expect(page.locator('.rack .tile')).toHaveCount(7);
 
+    // Opening the history reveals NO social controls on the seat plaques (a local game is
+    // account-less), and the Dictionary entry (the comms button) is kept for the active game.
+    await page.locator('.scoreboard').click();
+    await expect(page.locator('.fico')).toHaveCount(0);
+    await expect(page.locator('.chat-ico')).toBeVisible();
+    await page.locator('.scoreboard').click();
+
     // Host override: 🔐 -> master PIN -> skip the current turn -> confirm. The turn passes to Bob,
     // whose seat is open, so his rack shows without a lock.
     await page.locator('button.tab', { hasText: /Host|Ведущий/ }).click();