SheldonAI

Version 25 — chat input polish + cleanup

- Enter now sends your message and KEEPS the chat window open, with the
  cursor ready in the text box for your next line. (Previously Enter sent
  and closed the window.)
- ESC now closes the chat window reliably. While the window is open, the
  mod actively holds keyboard focus (re-asserted every quarter second), so
  keystrokes no longer leak to the hotbar mid-typing, ESC no longer opens
  the game menu instead of closing the chat, and the stuck-cursor state is
  gone.
- One press of F8 reopens the chat after closing it by any method (button,
  ESC, or F8). Previously some closes required a double-press to reopen.
- Internal cleanup: removed unused assets and dead code paths left over
  from earlier versions.

Recommended for all servers running V24.