[VaalRL]

Summary

• Player page: a Regular / Postseason switch, shown only for big league stats.
  • The existing Season / Career switch picks this postseason or the career postseason line.
  • The postseason request is sent only once the switch is used: /people/{id}?hydrate=stats(type=[season,career],gameType=P,season=…).
  • Postseason lines have no sabermetrics, so the advanced panel is hidden in that view. A player with no postseason games gets a message instead.
• Leaderboards: a Regular / Postseason switch.
  • /stats/leaders ignores gameType=P (ADR 0004). Instead the page fetches every player's postseason line from /stats?stats=season&gameType=P&playerPool=ALL, trimmed with fields=, and ranks them in src/utils/postseasonLeaders.ts. The result has the same shape as /stats/leaders, so LeaderCard is unchanged.
  • Rate stats (AVG/OBP/SLG/OPS, ERA/WHIP/K9) use the regular season's bar: 3.1 PA or 1 inning per game the club played. A club's game count is the most games any of its hitters played, so clubs knocked out early need less to qualify.
  • Ties share a rank, and a zero count doesn't lead anything. The AL/NL filter uses each club's league from teams.json.
• Which postseason is shown: this season's from late September, otherwise last season's (latestPostseasonSeason).
• Also fixes the player stats title, which had the year 2026 hard-coded.
• Version 1.10.0, with changelog and TODO Phase 43.

Verified against the live API (contract tests, run on this branch via workflow_dispatch: all pass)

• Ohtani's 2025 postseason line has 8 HR in 17 games. His career postseason line has more games and more home runs than that one season.
• The 2025 postseason player pool has more than 150 hitters. The Dodgers played 17 games. Every hitting and pitching category ranks at least 5 leaders, each with a value, a name and a team.

Test plan

• npm test: 406 pass (12 new)
• build, lint (0 errors)
• Screenshots of the player page at 1280px and 390px: the switches wrap, and nothing overflows the page

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