feat(arknights): track Arknights from its own wiki

The most-named game in the release thread, and the cheapest one to add: the
GameId, hue and dailyTasks have been sitting in games.ts since launch with no
source behind them.

arknights.wiki.gg is a better source than Game8 for this game, but it is not the
mp-event shape wikigg.ts reads, so it gets its own parser. Two properties of the
page drive the code:

- Every row lists CN and Global, about five months apart. Only Global is
  published; a row without one yields no event rather than borrowing the CN
  date. A CN date on a Global calendar is a confidently wrong date.
- Only the next boundary carries a machine-readable timer — the end while an
  event runs, the start while it is upcoming — so precision differs per side and
  flips when the event goes live. An exact instant is accepted only when it
  falls on the same UTC day as the date beside it, because startsAt.slice(0, 10)
  is part of the event ID: a start that moved a day would orphan every
  completion mark on the morning the event began.

Also sets resetOffsets for all three regions to UTC-7. Not a blanket per-game
offset — Arknights genuinely runs one Global server for every region we model,
and the page evidences the clock: every ending event ends at 10:59:59Z, which is
03:59:59 at UTC-7, one second before a 04:00 reset.

Six events, counted independently against the page before and after parsing.

Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>

test/adapters/game8.test.ts

@@ -1,6 +1,7 @@
 import { describe, expect, test } from "bun:test";
 import { adapterById } from "../../src/ingest/adapters/index.ts";
 import type { Adapter } from "../../src/ingest/adapters/types.ts";
+import { arknightsWikiParser } from "../../src/ingest/parsers/akwiki.ts";
 import { inferType } from "../../src/ingest/parsers/game8.ts";
 import { GachaEvent, type EventType } from "../../src/shared/schema.ts";
 
@@ -29,6 +30,7 @@ const CASES: Array<{ adapter: Adapter; fixture: string }> = [
   { adapter: adapter("endfield-wikigg-events"), fixture: "fixtures/endfield/wikigg-events-2026-08-14" },
   { adapter: adapter("nikki-game8-events"), fixture: "fixtures/nikki/game8-events-2026-08-17" },
   { adapter: adapter("p5x-game8-events"), fixture: "fixtures/p5x/game8-events-2026-08-17" },
+  { adapter: adapter("arknights-akwiki-events"), fixture: "fixtures/arknights/akwiki-events-2026-08-17" },
 ];
 
 async function runAdapter(adapter: Adapter, fixture: string) {
@@ -312,6 +314,83 @@ describe("p5x", () => {
   });
 });
 
+describe("arknights wiki", () => {
+  const fixture = "fixtures/arknights/akwiki-events-2026-08-17";
+  const akwiki = adapter("arknights-akwiki-events");
+
+  test("publishes the Global schedule and never the CN one", async () => {
+    // Every row carries both, and CN runs about five months ahead. A reader on
+    // Global told a CN date would be told an event ended in March that has not
+    // started yet — the confidently-wrong date this product exists to prevent.
+    const events = await runAdapter(akwiki, fixture);
+    expect(events).toHaveLength(6); // the six rows of the Ongoing/upcoming table
+
+    const crossing = events.find((e) => e.title === "[Story Collection] Crossing");
+    expect(crossing?.startsAt).toBe("2026-08-13T00:00:00.000Z"); // Global
+    // CN ran 2026/03/10 - 2026/03/17. Nothing in the output may fall there.
+    for (const e of events) expect(e.startsAt > "2026-06-01").toBe(true);
+  });
+
+  test("takes the exact boundary the countdown states, on whichever side it is", async () => {
+    // The page puts a machine-readable timer on the *next* boundary only: the
+    // end while an event is running, the start while it is still upcoming. So
+    // precision legitimately differs per event and per side.
+    const events = await runAdapter(akwiki, fixture);
+
+    const running = events.find((e) => e.title.startsWith("Vector Breakthrough"));
+    expect(running?.endPrecision).toBe("exact");
+    expect(running?.endsAt).toBe("2026-08-20T10:59:59.000Z");
+    expect(running?.startPrecision).toBe("day");
+
+    const upcoming = events.find((e) => e.title === "[Side Story] People, A People");
+    expect(upcoming?.startPrecision).toBe("exact");
+    expect(upcoming?.startsAt).toBe("2026-09-16T15:00:00.000Z");
+    expect(upcoming?.endPrecision).toBe("day");
+  });
+
+  test("an exact instant never moves the day an event ID is built from", async () => {
+    // The ID ends in startsAt.slice(0, 10). When an upcoming event goes live
+    // its exact start disappears from the page and the day-precision date takes
+    // over, so the two must agree on the day or every completion mark for that
+    // event is orphaned the morning it starts.
+    const events = await runAdapter(akwiki, fixture);
+    for (const e of events) {
+      expect(e.id.endsWith(e.startsAt.slice(0, 10))).toBe(true);
+    }
+  });
+
+  test("reports one global end rather than inventing per-region ones", async () => {
+    // Arknights serves all three of our regions from one Global server, which
+    // is the opposite of Endfield. regionScoped means the source distinguishes
+    // regions; this one does not.
+    for (const e of await runAdapter(akwiki, fixture)) {
+      expect(e.regionScoped).toBe(false);
+      expect(e.regionEnds).toBeNull();
+    }
+  });
+
+  test("the back catalogue under 'By year' stays off the calendar", async () => {
+    // The same table class repeats further down the page for every event the
+    // game has ever run. Inclusion has to stop at the next heading.
+    const titles = (await runAdapter(akwiki, fixture)).map((e) => e.title);
+    expect(titles).not.toContain("Ceremonial Rite");
+    expect(titles.length).toBeLessThan(20);
+  });
+
+  test("fails loudly if the wiki drops the section or the table", async () => {
+    const html = await Bun.file(`${fixture}.html`).text();
+    const parser = arknightsWikiParser;
+    expect(parser.canParse(html)).toBe(true);
+    expect(parser.canParse(html.replace(/mrfz-wtable/g, "x-table"))).toBe(false);
+    // MediaWiki emits both the modern anchor and a legacy percent-escaped one
+    // (`Ongoing.2Fupcoming`) on the same heading, so a rename has to take both
+    // away before the parser should give up on the page.
+    expect(
+      parser.canParse(html.replace(/id="Ongoing(\/|\.2F)upcoming"/g, 'id="Now"')),
+    ).toBe(false);
+  });
+});
+
 describe("wiki.gg parser", () => {
   test("reads exact per-region timers", async () => {
     // The first source that states region-scoped ends. Asia and the Americas