Zareian 701d8badcc make streaks and the leaderboard live, and stop three AI chats from freezing the API ...

Found in a deeper pass over what the frontend's flow actually touches:

- Nothing in the app ever wrote StreakRecord: "days in a row" was 0 forever
  for every real user. Answers and lesson/island completions now record the
  day (Tehran time); a broken chain shows 0. A streak error never fails the
  answer itself.
- /api/leaderboard only changed when someone ran rebuild_leaderboard by
  hand. It is now computed live (60s cache); weekly counts island XP too.
- gunicorn ran 3 sync workers with a 30s timeout, so every "ask Pi" stream
  pinned a whole worker (~10s, GapGPT buffers the answer) and three at once
  queued the entire API. gunicorn.conf.py (read automatically from the
  working directory) switches to gthread, 8 threads, 120s timeout.
- Every /api/ response now says Cache-Control: private, no-store, so turning
  on caching in the ArvanCloud panel can never serve one student another's data.
- /api/user/summary named no active plan ever ("subscription app not
  implemented yet" had long stopped being true).

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

2026-09-24 06:39:50 +03:30

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