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/src/lib/app.svelte.ts

@@ -824,6 +824,16 @@ export async function bootstrap(): Promise<void> {
     window.visualViewport.addEventListener('scroll', syncViewport);
   }
 
+  // Enter on a single-line <input> dismisses the soft keyboard (blur): the keyboard's default
+  // return/"Go" key otherwise does nothing on a bare input, which reads as stuck. A <textarea> (the
+  // feedback form) is excluded so Enter still inserts a newline; a form's own Enter→submit still
+  // fires first (this listener is on the document, so it runs after the field's own handler).
+  if (typeof document !== 'undefined') {
+    document.addEventListener('keydown', (e) => {
+      if (e.key === 'Enter' && e.target instanceof HTMLInputElement) e.target.blur();
+    });
+  }
+
   // Load the Telegram Mini App SDK dynamically, with a timeout, on a Telegram entry — it is no
   // longer a render-blocking <script> in index.html, so a network that blocks telegram.org (common
   // where Telegram itself reaches users only over a proxy) cannot hang the page and strand the app