Fix championship race section visibility from day 14

[dai]

Motivation

• The championship table added for Day 14 in a prior change did not appear when Day 14 was known via today data but not yet published in resultDays, because currentDay only considered published result days.

Description

• Update app/page.tsx to compute latestKnownDay = MAY2026_TORIKUMI_DATA.today?.makuuchi.day || 0 and set currentDay = Math.max(latestPublishedResultDay, latestKnownDay) so the championship section shows once the known day reaches 14 even before results are published.

Testing

• Ran npm test -- app/page.test.tsx which passed, and note that an earlier attempt npm test -- app/page.test.tsx --runInBand failed because Vitest does not recognize the --runInBand option.

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Codex Task

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