style: apply ruff format and fix lint issues in playoff modules

- Rename single-letter `l` loop variables in bracket_view to satisfy E741
- Drop unused `json` import from test_playoff_cache (F401/F811)

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

tests/test_games.py

@@ -756,9 +756,7 @@ class TestPlayoffEnrichment:
     }
 
     def test_regular_season_game_has_empty_playoff_fields(self, mocker):
-        mocker.patch(
-            "app.games.get_team_standings", return_value=self._FULL_STANDINGS
-        )
+        mocker.patch("app.games.get_team_standings", return_value=self._FULL_STANDINGS)
         result = parse_games({"games": [make_game()]})
         g = result[0]
         assert g["Is Playoff"] is False
@@ -791,9 +789,7 @@ class TestPlayoffEnrichment:
         assert "GAME 7" in result[0]["Series Badges"]
 
     def test_pinned_game_sorts_first(self, mocker):
-        mocker.patch(
-            "app.games.get_team_standings", return_value=self._FULL_STANDINGS
-        )
+        mocker.patch("app.games.get_team_standings", return_value=self._FULL_STANDINGS)
         # Low-priority Game 7 PRE should sort above a high-priority non-playoff LIVE
         g7_pre = make_playoff_game(
             top_wins=3,
@@ -835,9 +831,7 @@ class TestPlayoffEnrichment:
         assert result[0]["OT Label"] == "OT"
 
     def test_regular_season_ot_not_flagged_as_playoff_ot(self, mocker):
-        mocker.patch(
-            "app.games.get_team_standings", return_value=self._FULL_STANDINGS
-        )
+        mocker.patch("app.games.get_team_standings", return_value=self._FULL_STANDINGS)
         game = make_game(
             game_state="LIVE", period=4, seconds_remaining=180, game_type=2
         )