feat(arena): 아레나 전투 로그 위젯 추가

- ArenaCombatLog: 전투 로그 표시 위젯
- ArenaBattleScreen 연동

lib/src/features/arena/arena_battle_screen.dart

@@ -8,6 +8,7 @@ import 'package:asciineverdie/src/core/model/combat_event.dart';
 import 'package:asciineverdie/src/core/model/game_state.dart';
 import 'package:asciineverdie/src/core/model/hall_of_fame.dart';
 import 'package:asciineverdie/src/core/animation/race_character_frames.dart';
+import 'package:asciineverdie/src/features/arena/widgets/arena_combat_log.dart';
 import 'package:asciineverdie/src/features/arena/widgets/arena_result_panel.dart';
 import 'package:asciineverdie/src/features/arena/widgets/ascii_disintegrate_widget.dart';
 import 'package:asciineverdie/src/features/game/widgets/ascii_animation_card.dart';
@@ -376,8 +377,13 @@ class _ArenaBattleScreenState extends State<ArenaBattleScreen>
   }
 
   void _endBattle() {
-    // 최종 결과 계산
-    _result = _arenaService.executeCombat(widget.match);
+    // 시뮬레이션 HP 결과를 기반으로 최종 결과 계산
+    _result = _arenaService.createResultFromSimulation(
+      match: widget.match,
+      challengerHp: _challengerHp,
+      opponentHp: _opponentHp,
+      turns: _currentTurn,
+    );
 
     // 전투 종료 상태로 전환 (인라인 결과 패널 표시)
     setState(() {
@@ -836,7 +842,7 @@ class _ArenaBattleScreenState extends State<ArenaBattleScreen>
         borderRadius: BorderRadius.circular(8),
         border: Border.all(color: RetroColors.borderOf(context)),
       ),
-      child: CombatLog(entries: _battleLog),
+      child: ArenaCombatLog(entries: _battleLog),
     );
   }