feat: rebuild Infinity Nikki on a live source, at day precision

The Game8 page stopped being updated on 31 August 2025 and mentions 2026 zero
times, and it had been publishing five year-old events with endsAt: null — which
the app renders as live-with-unknown-end indefinitely. That is worse than an
empty lane, and nothing in the pipeline catches it, because a stale page is not
a broken one: it fetches, it parses, it passes every test.

The replacement is the game's Fandom wiki, permitted by the same standard
robots.txt that cleared Nikke, maintained to within two days, and shaped as
Current / Upcoming / Permanent / Past tables of Event | Duration | Description
| Type.

Its durations state a wall clock on both sides and no zone anywhere for that
column, so parseZonelessClockRange reads the clock and discards it, publishing
the printed date at day precision. That invents nothing and treats these cells
exactly as every Game8 date already is. Converting instead would mean picking an
offset, and the offset moves the day: July 16 20:00 read as UTC-7 is July 17,
and the start's day is half of every event ID this game will ever have.

The Game8 entry is removed rather than kept as a second opinion, since a source
whose every row is wrong is not corroboration. Its fixture stays: it is the only
page here carrying the labelled "Start: ... End: Permanent" shape, and the test
now drives it through the parser directly.

Titles come from a link's title attribute, which never passes through text(), so
they are entity-decoded by hand — otherwise "Alison's Travel Shop" becomes a
slug, and a slug is a localStorage key. The ingest sanitiser caught exactly that
during the build.

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

docs/DATA-MODEL.md

@@ -319,6 +319,11 @@ Note also that `nikke` and `nikki` are one letter apart and are different games
 Nikke and Infinity Nikki. Both are the first segment of every completion key their game will ever
 have, so a typo in either direction is silent data loss for real readers.
 
+Infinity Nikki's source changed on 2026-08-19 and its silence changed shape with it: the Fandom wiki
+states a wall clock on every boundary and no zone for it, so there is still nothing to read a server
+map off — the clock is discarded at ingest and only the printed day is published. An offset invented
+here would move real readers' day keys.
+
 Infinity Nikki, P5X, Blue Archive, Chaos Zero Nightmare and Umamusume carry **no `resetOffsets`
 entry**, so they take the regional default. That is an assumption, not a verified server map — none
 of those sources states one. Two of the 2026-08-19 additions are worth separating out, because they