Hangman joins Snake as a built-in, leaderboard-backed TUI game (PRD §5.1).
Endless mode: each solved word banks points (longer words and unused guesses
score more) and deals a fresh word with full lives; the run ends when one word
exhausts all six wrong guesses, persisting the total for members under the
"hangman" score key. Guests play without persisting, same as Snake.
Generalize the leaderboard board to take a game name and split the single
"Leaderboard" row into per-game "Leaderboard — Snake" / "Leaderboard — Hangman"
entries.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
