FUT Champions (Weekend League):
- POST /fut-champs/start — open a new 30-match week (one active session at a time)
- GET /fut-champs — current session status with matches_remaining
- POST /fut-champs/:id/result — record a match; auto-completes and computes tier at 30
- POST /fut-champs/:id/claim — claim coins + pack reward (idempotent guard)
- GET /fut-champs/history — past sessions newest-first
- 11 reward tiers: Elite (27+ wins, 50k coins + icon pack) down to Bronze 1 (0 wins, 250 coins)
Division Rivals:
- POST /rivals/claim-weekly — claim weekly reward scaled by current division
- Week counter is monotonic (offline-safe, no real-time calendar dependency)
- Division 1-3 get a bonus pack alongside coins
Migration 0008 adds fut_champs_sessions table and two columns to seasons.
12 new integration tests — all 67 pass, clippy clean.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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