Adv 2.0 Phase L2 step 4b: clarify Misty repair comment

runZoneCombat already calls npcRepairMostDamaged internally when the
Misty buff is active and the 20% chance hits — boss flow inherits that
behavior automatically. The comment in resolveArenaRound previously
implied the boss flow skipped Misty repairs, which was wrong.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

internal/plugin/adventure_arena.go

@@ -250,8 +250,9 @@ func (p *AdventurePlugin) resolveArenaRound(ctx MessageContext, run *ArenaRun, c
 		return p.resolveArenaDeath(ctx, run, char, tier, monster, result, bossNarr)
 	}
 
-	// Misty condition repair (post-combat). Boss-flow path runs through
-	// runZoneCombat which doesn't surface condRepair; skip it there.
+	// Misty condition repair (post-combat) for the legacy path. Boss flow
+	// runs through runZoneCombat, which calls npcRepairMostDamaged
+	// internally — no surfaced return value needed.
 	if condRepair > 0 {
 		npcRepairMostDamaged(ctx.Sender, equip, condRepair)
 	}