v1.41.0

Added

• Fullscreen focus mode for the chat: pick Pantalla completa in the
  conversation settings menu and the chat overlays the whole app — sidebar,
  header and padding included — with the background image stretched edge to
  edge and only the messages, their context menus and the composer visible.
  Leave it with the floating button or Escape, and the composer turns
  translucent so the background reaches the bottom.

Fixed

• The avatar link in the chat header had a hardcoded Spanish label; it is
  translated now.

Changed

• The chat header lives in its own component (chat-header.tsx).