Stage 7 (wip): UI shell, libs, mock transport, screens (lobby->game), e2e smoke

- plain Svelte 5 + TS + Vite (no SvelteKit); CSS-token design system (Telegram-ready), hash router, IndexedDB session
- pure libs: domain model, premium/value maps ported from solver, board replay, placement state machine, i18n en/ru
- in-memory mock transport + seed data; pnpm start runs lobby->active game->board with no backend
- board: pointer-drag + tap placement, MakeMove (popup / 1s-hold commit), two-state zoom, blank chooser, exchange, hint, word-check, chat
- Playwright smoke (mock) green; svelte-check clean; mock bundle ~37 KB gzip

ui/src/screens/Profile.svelte

@@ -0,0 +1,67 @@
+<script lang="ts">
+  import Header from '../components/Header.svelte';
+  import { app, logout } from '../lib/app.svelte';
+  import { t } from '../lib/i18n/index.svelte';
+</script>
+
+<Header title={t('profile.title')} back="/" />
+<main class="page">
+  {#if app.profile}
+    <div class="name">{app.profile.displayName}</div>
+    {#if app.profile.isGuest}<span class="badge">{t('profile.guest')}</span>{/if}
+    <dl>
+      <dt>{t('profile.language')}</dt>
+      <dd>{app.profile.preferredLanguage}</dd>
+      <dt>{t('profile.timezone')}</dt>
+      <dd>{app.profile.timeZone}</dd>
+      <dt>{t('profile.hintBalance')}</dt>
+      <dd>{app.profile.hintBalance}</dd>
+    </dl>
+    <p class="muted">{t('profile.readonly')}</p>
+    <button class="logout" onclick={() => logout()}>{t('login.title')} / logout</button>
+  {/if}
+</main>
+
+<style>
+  .page {
+    padding: var(--pad);
+  }
+  .name {
+    font-size: 1.4rem;
+    font-weight: 700;
+  }
+  .badge {
+    display: inline-block;
+    margin-top: 4px;
+    padding: 2px 8px;
+    border-radius: 999px;
+    background: var(--surface-2);
+    color: var(--text-muted);
+    font-size: 0.8rem;
+  }
+  dl {
+    display: grid;
+    grid-template-columns: auto 1fr;
+    gap: 6px 16px;
+    margin: 20px 0;
+  }
+  dt {
+    color: var(--text-muted);
+  }
+  dd {
+    margin: 0;
+    text-align: right;
+  }
+  .muted {
+    color: var(--text-muted);
+    font-size: 0.9rem;
+  }
+  .logout {
+    margin-top: 16px;
+    padding: 8px 14px;
+    border: 1px solid var(--border);
+    background: var(--surface);
+    color: var(--text);
+    border-radius: var(--radius-sm);
+  }
+</style>