fix(gauntlet): fix loss_max=0 falsy-zero trap in recap marker logic

`(loss_max or 99)` treats `loss_max=0` as 99, so 10-1 runs showed ⬜
instead of ❌ for perfect-run rewards. Fix uses explicit None check.
Tighten test to assert ❌ presence rather than just absence of ✅.

Addresses review feedback on PR #165.

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

gauntlets.py

@@ -2472,7 +2472,13 @@ def build_gauntlet_recap_embed(
                 if loss_max is not None
                 else wins >= win_num
             )
-            marker = "✅" if earned else "❌" if losses > (loss_max or 99) else "⬜"
+            marker = (
+                "✅"
+                if earned
+                else "❌"
+                if losses > (loss_max if loss_max is not None else 99)
+                else "⬜"
+            )
 
             reward = r.get("reward", {})
             if reward.get("money"):

tests/test_gauntlet_recap.py

@@ -204,11 +204,11 @@ class TestBuildGauntletRecapEmbed:
             make_run(wins=10, losses=1), make_event(), make_main_team(), make_rewards()
         )
         prize_field = next(f for f in embed.fields if f.name == "Prize Distribution")
-        # The 10-0 bonus line must appear without ✅ (either ❌ or ⬜)
+        # The 10-0 bonus line must be marked ❌ — ineligible, not pending (⬜)
         lines = prize_field.value.split("\n")
         bonus_line = next((line for line in lines if "10-0" in line), None)
         assert bonus_line is not None, "Expected a '10-0' line in prizes"
-        assert "✅" not in bonus_line
+        assert "❌" in bonus_line
 
     def test_empty_rewards_list_omits_prize_field(self):
         """When rewards is an empty list the Prize Distribution field must be omitted.