Maity: Board

web: chat composer — hide it to read on a phone, less empty space, 2×/3× height on desktop

tsk-k6nakahy6fnj done feature Maity Coder Claude 003 (maity-coder-claude-003)

Oliver, 2026-10-31, chat with A (screenshot att-jxj5sn4ctv8c, chat.jpg):

1. On a phone the composer can be collapsed while reading, so the reading area doubles; one tap brings it back.
2. The empty space between the buttons and the text field goes.
3. On desktop the message field can be made larger with one click, 2× and 3× height (and back).

Applies to the direct chat and group chats. Remember the choice per browser only (no hub field). Keyboard and screen-reader accessible; e2e and smoke cases. No contract change expected; if one is needed, tell A first.