Bernard Siebens f2b78bb1dd Build the club metrics
The club page now leads with its own numbers that should be zero, then the health
signals underneath.

- Teams with no coach. Not a statistic but a defect in the club's setup: with
  nobody in a management position the access service grants no authority over that
  team, so nobody can pick the squad. A physio does not count -- the query keys on
  Position.management_position, and on this season only.
- Unrostered members: active, paid, and on no team.
- Unpaid money bucketed by age. "€250 overdue past 60 days" drives a phone call;
  "€250 outstanding" does not.
- Renewal rate -- last season's actives who signed up again. Exactly computable
  because memberships are season-scoped.
- Turnout, plus the share who never responded. Silence is not an absence, so it is
  excluded from turnout and reported separately: no-response is the leading
  indicator, since it measures whether members use the app at all.

Two of these return None rather than a number, deliberately: a club in its first
season has not failed to renew anyone, and a season with no past events has no
turnout. Rendering either as 0% would libel the club, so the page says why instead.

Money is pinned to two decimals -- SQLite's Sum() drops trailing zeros, so an
aggregate rendered "€250" next to a "€0.00" constant on the same card.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-07-14 01:08:37 +02:00
2026-07-14 01:08:37 +02:00
2026-07-14 01:08:37 +02:00
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