fix: screen uses court_number, seed resets sequences

backend/seed.py

@@ -23,6 +23,14 @@ def clear_data(db: Session):
     db.query(Court).delete()
     db.query(Player).delete()
     db.commit()
+    # Reset sequences
+    for table in ['players', 'courts', 'bookings', 'matches', 'match_players',
+                  'tournaments', 'tournament_entries', 'tournament_matches']:
+        try:
+            db.execute(__import__('sqlalchemy').text(f"ALTER SEQUENCE {table}_id_seq RESTART WITH 1"))
+        except Exception:
+            pass
+    db.commit()
     print("Cleared existing data")