Squash merge feature/library-reorganization

backend/tests/fixtures/teamsnap/README.md

@@ -0,0 +1,25 @@
+These are sample TeamSnap API v3 Collection+JSON responses.
+
+The payloads use upstream TeamSnap URLs (`https://apiv3.teamsnap.com`) so
+tests can rewrite them through the local proxy root without guessing at paths.
+
+The set includes:
+
+- `root.json`
+- `me.json`
+- `teams.json`
+- `members.json`
+- `events.json`
+- `availabilities.json`
+- `assignments.json`
+- `event_lineups.json`
+- `event_lineup_entries.json`
+
+They are intentionally small but cover the collections this app reads:
+
+- `me` for auth/session identity
+- `teams` for team selection
+- `members` for player lookup
+- `events` for the operator/game flow
+- `availabilities`, `assignments`, `eventLineups`, and `eventLineupEntries`
+  for lineup and game preparation screens