fix(game8): drop the Battle Pass label Fandom does not print

Game8 heads Genshin's pass "Battle Pass - Moontrace"; Fandom lists "Moontrace" and files the category in a column. The label minted a second id for one event, so every battle pass since the Fandom source landed has been on the calendar twice, and a reader reported it.

Both sources now mint the same id and merge fuses them by id. The two Game8 ids that moved, Frostfarer and Moontrace (the only ones git history shows ever shipped), go in RETIRED_IDS so readers' marks follow.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/client/state/retiredIds.ts

@@ -10,14 +10,21 @@ export type CarryTable = Readonly<Record<string, string>>;
  *
  * An event id is a localStorage key (AGENTS.md § Event IDs are localStorage
  * keys), so an id that moves takes the reader's marks with it unless they are
- * carried across. A change that moves ids — a parser fix that renames a title
- * is the usual one — lands its entries here, in the same commit.
+ * carried across. These moved on 2026-10-14, when the Game8 parser stopped
+ * keeping `Battle Pass -` in front of Genshin's pass names: Fandom had always
+ * published the bare name, and the two ids put every pass on the calendar
+ * twice (docs/superpowers/specs/2026-10-14-genshin-duplicates-design.md).
  *
- * An explicit table, never a pattern: a pattern would also catch an id nobody
- * retired. Keep each entry for at least a year — a reader who has not opened
- * the app since still has marks under the old id.
+ * An explicit table, never a pattern: the battle passes are the only two such
+ * ids that ever shipped (git history of snapshots/ and fixtures/), and a
+ * pattern would also catch an id nobody retired. Keep it until at least
+ * 2027-10-14 — a reader who has not opened the app since still has marks under
+ * the old ids.
  */
-export const RETIRED_IDS: CarryTable = {};
+export const RETIRED_IDS: CarryTable = {
+  "genshin:battle-pass-frostfarer:2026-08-12": "genshin:frostfarer:2026-08-12",
+  "genshin:battle-pass-moontrace:2026-09-23": "genshin:moontrace:2026-09-23",
+};
 
 /**
  * Move each entry under an old id in `table` to its replacement.