Contract 7.1.18

The clan tools after the Elixir Gym's fifth run on them (feedback #305-#307).

• clans_members_timeline compact: delta.donations and delta.donations_received are what the weekly counter added across the window, a reset counted from zero. Last minus first had read the Monday reset as a loss: 28 of 48 members negative over one week (#305).
• war_history.member_weeks[].training_decks rebuilt for weeks before 2026-09-24 now splits training days where the clan's own race rolls them (its recorded close slot, e.g. 09:38Z), not at 10:00Z: battles in that gap had landed on the wrong day and been cut by the four-a-day cap (#306).

Additive.