fix: suppress misleading "Game X of 7" on future-date playoff cards

FUT games from the score API carry the current seriesStatus, not the
anticipated state, so all future games in a series computed the same
game number. Skip the summary for FUT games; badges and blurbs still
render.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/playoff.py

@@ -158,6 +158,8 @@ def series_badges(game):
 
 def series_summary(game):
     """Short line rendered above the card, e.g. 'Game 2 of 7'."""
+    if game.get("gameState") == "FUT":
+        return ""
     state = series_state(game.get("seriesStatus", {}))
     return f"Game {_game_number(game, state)} of 7"