Preferences: motion, confirming a move, coordinates on the board, and the last table choices remembered

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Jm2auWk6RP71CjaAb4FMoG

src/lib/game/spec.ts

@@ -39,6 +39,8 @@ export interface GameSpec<State, Input> {
 	seatIds: SeatId[];
 	/** What the host may choose when opening a table; empty for a game with one way to play. */
 	options?: TableOption[];
+	/** The game's own settings for the preferences panel, kept in the player's browser (see $lib/prefs.svelte). */
+	preferences?: { key: string; label: string; kind: 'toggle' | 'choice'; choices?: { value: string; label: string }[]; default: boolean | string; note?: string }[];
 	minSeats: number;
 	/** Names the server draws for bots, in preference order. */
 	botNames: string[];