#166 · SimpleX per-room toggles !room ai/rps/dice/translate + auto-translate pipeline

Context

Signal supports per-room config (toggle AI, games, auto-translate to a language). SimpleX has none.

Acceptance criteria

• [ ] !room ai on/off, !room rps on/off, !room dice on/off, !room translate on/off <lang> (admin) persist per-group settings.
• [ ] Rooms with translate enabled auto-translate incoming messages (rate-limited per room).
• [ ] Command dispatch respects the AI/games toggles.

Technical hints

• Signal reference: handleRoomSettings; auto-translate in signal-bot-v2.ts.
• SimpleX target: commands/admin/room.command.ts; add a room_settings table (no such table exists yet — database/006_votes_and_settings.sql covers votes/prefs only). Auto-translate hook in the simplex-bot.ts message loop.

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