UI: taller tg-fullscreen header + labelled hub tabs

- tg-fullscreen: +20px header height — without the (removed) hamburger the
  title bar lost its bulk and sat flush on Telegram's native nav band.
- Settings/Comms hub tabs gain text labels under the icons (Settings /
  Profile / Friends / Info and Chat / Dictionary); the icon is aria-hidden
  so the label names the button. New i18n keys about.tab, game.dictionary.

ui/e2e/social.spec.ts

@@ -12,7 +12,7 @@ async function loginLobby(page: Page): Promise<void> {
 
 // The Settings hub (the lobby ⚙️ tab) hosts Settings / Profile / Friends / About as in-place
 // tabs; the back control always returns to the lobby. Tabs are icon-only with an aria-label.
-async function openSettingsTab(page: Page, tab: 'Profile' | 'Friends' | 'About'): Promise<void> {
+async function openSettingsTab(page: Page, tab: 'Profile' | 'Friends' | 'Info'): Promise<void> {
   await page.getByRole('button', { name: /Settings/ }).click(); // lobby ⚙️ tab
   await expect(page.locator('.pane')).toHaveCount(1); // let the slide settle
   await page.getByRole('button', { name: tab, exact: true }).click();
@@ -70,7 +70,7 @@ test('settings hub: tabs switch in place and back returns to the lobby', async (
   await expect(page.getByText('Friend requests')).toBeVisible();
   await expect(page.locator('.pane')).toHaveCount(1);
 
-  await page.getByRole('button', { name: 'About', exact: true }).click();
+  await page.getByRole('button', { name: 'Info', exact: true }).click();
   await expect(page.getByText(/Version/)).toBeVisible();
 
   // Back returns to the lobby from any tab.
@@ -114,7 +114,7 @@ test('finished game draws an inert footer and trims live-only controls', async (
   // The comms hub offers Chat only — the Dictionary tab is hidden for a finished game.
   await page.getByRole('button', { name: 'Chat' }).click(); // 💬
   await expect(page.locator('.pane')).toHaveCount(1);
-  await expect(page.getByRole('button', { name: 'Check word' })).toHaveCount(0);
+  await expect(page.getByRole('button', { name: 'Dictionary' })).toHaveCount(0);
 });
 
 test('lobby: hiding a finished game removes it (kebab → ❌), keeping the others', async ({ page }) => {