Players can choose their own name

An inline editor in the standfirst; the name is remembered in the
browser, applied to the current duel, and used for every duel after.
The opponent is drawn from the list avoiding the player's name.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

src/lib/game/duel.svelte.ts

@@ -98,9 +98,21 @@ function blankSets(): Record<SetName, Record<Hand, HandDraft>> {
 	return { main: { left: blankDraft(), right: blankDraft() }, haste: { left: blankDraft(), right: blankDraft() } };
 }
 
-function pickNames(): { A: string; B: string } {
-	const pool = [...NAMES];
-	const a = pool.splice(Math.floor(Math.random() * pool.length), 1)[0];
+const NAME_KEY = 'wh:name';
+export const NAME_MAX = 24;
+
+function readName(): string {
+	try {
+		return (localStorage.getItem(NAME_KEY) ?? '').trim().slice(0, NAME_MAX);
+	} catch {
+		return '';
+	}
+}
+
+/** The player's chosen name if they have one, and an opponent who is not called the same. */
+function pickNames(player = readName()): { A: string; B: string } {
+	const pool = NAMES.filter((n) => n.toLowerCase() !== player.toLowerCase());
+	const a = player || pool.splice(Math.floor(Math.random() * pool.length), 1)[0];
 	const b = pool[Math.floor(Math.random() * pool.length)];
 	return { A: a, B: b };
 }
@@ -227,6 +239,22 @@ export class Duel {
 		}
 	}
 
+	/** Rename the player for this duel and every duel after it. An empty name goes back to a drawn one. */
+	setName(raw: string): void {
+		const name = raw.trim().slice(0, NAME_MAX);
+		try {
+			if (name) localStorage.setItem(NAME_KEY, name);
+			else localStorage.removeItem(NAME_KEY);
+		} catch {
+			// The name still applies to this duel.
+		}
+		const next = name || pickNames('').A;
+		if (next.toLowerCase() === this.foe.name.toLowerCase()) {
+			this.state.wizards[FOE].name = pickNames(next).B;
+		}
+		this.state.wizards[YOU].name = next;
+	}
+
 	/** Write the duel and the half-written turn to local storage. Reads everything it saves, so an effect can track it. */
 	persist(): void {
 		const bundle: SavedDuel = {