feat(arena): 결과 패널 및 소멸 애니메이션 위젯 추가

- ArenaResultPanel: 전투 결과 표시 패널
- AsciiDisintegrateWidget: ASCII 소멸 애니메이션 효과
- ArenaBattleScreen 개선

lib/src/features/arena/arena_battle_screen.dart

@@ -7,7 +7,9 @@ import 'package:asciineverdie/src/core/model/arena_match.dart';
 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/features/arena/widgets/arena_result_dialog.dart';
+import 'package:asciineverdie/src/core/animation/race_character_frames.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';
 import 'package:asciineverdie/src/features/game/widgets/combat_log.dart';
 import 'package:asciineverdie/src/shared/retro_colors.dart';
@@ -88,6 +90,9 @@ class _ArenaBattleScreenState extends State<ArenaBattleScreen>
   /// 현재 표시 중인 스킬 이름
   String? _currentSkillName;
 
+  /// 전투 종료 여부 (결과 패널 표시용)
+  bool _isFinished = false;
+
   @override
   void initState() {
     super.initState();
@@ -374,20 +379,19 @@ class _ArenaBattleScreenState extends State<ArenaBattleScreen>
     // 최종 결과 계산
     _result = _arenaService.executeCombat(widget.match);
 
-    // 결과 다이얼로그 표시
-    Future.delayed(const Duration(milliseconds: 500), () {
-      if (mounted && _result != null) {
-        showArenaResultDialog(
-          context,
-          result: _result!,
-          onClose: () {
-            widget.onBattleComplete(_result!);
-          },
-        );
-      }
+    // 전투 종료 상태로 전환 (인라인 결과 패널 표시)
+    setState(() {
+      _isFinished = true;
     });
   }
 
+  /// Continue 버튼 콜백
+  void _handleContinue() {
+    if (_result != null) {
+      widget.onBattleComplete(_result!);
+    }
+  }
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
@@ -413,23 +417,17 @@ class _ArenaBattleScreenState extends State<ArenaBattleScreen>
             _buildRetroHpBars(),
             // 전투 이벤트 아이콘 (HP 바와 애니메이션 사이)
             _buildCombatEventIcons(),
-            // ASCII 애니메이션 (중앙) - 기존 AsciiAnimationCard 재사용
-            Padding(
-              padding: const EdgeInsets.symmetric(horizontal: 8),
-              child: SizedBox(
-                height: 120,
-                child: AsciiAnimationCard(
-                  taskType: TaskType.kill,
-                  raceId: widget.match.challenger.race,
-                  shieldName: _hasShield(widget.match.challenger) ? 'shield' : null,
-                  opponentRaceId: widget.match.opponent.race,
-                  opponentHasShield: _hasShield(widget.match.opponent),
-                  latestCombatEvent: _latestCombatEvent,
-                ),
-              ),
-            ),
+            // ASCII 애니메이션 (전투 중 / 종료 분기)
+            _buildBattleArea(),
             // 로그 영역 (남은 공간 채움)
             Expanded(child: _buildBattleLog()),
+            // 결과 패널 (전투 종료 시)
+            if (_isFinished && _result != null)
+              ArenaResultPanel(
+                result: _result!,
+                turnCount: _currentTurn,
+                onContinue: _handleContinue,
+              ),
           ],
         ),
       ),
@@ -443,6 +441,141 @@ class _ArenaBattleScreenState extends State<ArenaBattleScreen>
     return equipment.any((item) => item.slot.name == 'shield');
   }
 
+  /// 전투 영역 (전투 중 / 종료 분기)
+  Widget _buildBattleArea() {
+    if (_isFinished && _result != null) {
+      return _buildFinishedBattleArea();
+    }
+    return _buildActiveBattleArea();
+  }
+
+  /// 활성 전투 영역 (기존 AsciiAnimationCard)
+  Widget _buildActiveBattleArea() {
+    return Padding(
+      padding: const EdgeInsets.symmetric(horizontal: 8),
+      child: SizedBox(
+        height: 120,
+        child: AsciiAnimationCard(
+          taskType: TaskType.kill,
+          raceId: widget.match.challenger.race,
+          shieldName: _hasShield(widget.match.challenger) ? 'shield' : null,
+          opponentRaceId: widget.match.opponent.race,
+          opponentHasShield: _hasShield(widget.match.opponent),
+          latestCombatEvent: _latestCombatEvent,
+        ),
+      ),
+    );
+  }
+
+  /// 종료된 전투 영역 (승자 유지 + 패자 분해)
+  Widget _buildFinishedBattleArea() {
+    final isVictory = _result!.isVictory;
+    final winnerRaceId =
+        isVictory ? widget.match.challenger.race : widget.match.opponent.race;
+    final loserRaceId =
+        isVictory ? widget.match.opponent.race : widget.match.challenger.race;
+
+    // 패자 캐릭터 프레임 (idle 첫 프레임)
+    final loserFrameData = RaceCharacterFrames.get(loserRaceId) ??
+        RaceCharacterFrames.defaultFrames;
+    final loserLines = loserFrameData.idle.first.lines;
+
+    // 승자 캐릭터 프레임 (idle 첫 프레임)
+    final winnerFrameData = RaceCharacterFrames.get(winnerRaceId) ??
+        RaceCharacterFrames.defaultFrames;
+    final winnerLines = winnerFrameData.idle.first.lines;
+
+    return Padding(
+      padding: const EdgeInsets.symmetric(horizontal: 8),
+      child: SizedBox(
+        height: 120,
+        child: Row(
+          mainAxisAlignment: MainAxisAlignment.spaceEvenly,
+          children: [
+            // 좌측: 도전자 (승자면 유지, 패자면 분해)
+            Expanded(
+              child: Center(
+                child: isVictory
+                    ? _buildStaticCharacter(winnerLines, false)
+                    : AsciiDisintegrateWidget(
+                        characterLines: _mirrorLines(loserLines),
+                      ),
+              ),
+            ),
+            // 중앙 VS
+            Text(
+              'VS',
+              style: TextStyle(
+                fontFamily: 'PressStart2P',
+                fontSize: 10,
+                color: RetroColors.goldOf(context).withValues(alpha: 0.5),
+              ),
+            ),
+            // 우측: 상대 (승자면 유지, 패자면 분해)
+            Expanded(
+              child: Center(
+                child: isVictory
+                    ? AsciiDisintegrateWidget(characterLines: loserLines)
+                    : _buildStaticCharacter(
+                        _mirrorLines(winnerLines),
+                        false,
+                      ),
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+
+  /// 정적 ASCII 캐릭터 표시
+  Widget _buildStaticCharacter(List<String> lines, bool mirrored) {
+    final textColor = RetroColors.textPrimaryOf(context);
+    return Column(
+      mainAxisSize: MainAxisSize.min,
+      children: lines
+          .map((line) => Text(
+                line,
+                style: TextStyle(
+                  fontFamily: 'JetBrainsMono',
+                  fontSize: 10,
+                  color: textColor,
+                  height: 1.2,
+                ),
+              ))
+          .toList(),
+    );
+  }
+
+  /// ASCII 문자열 미러링 (좌우 대칭)
+  List<String> _mirrorLines(List<String> lines) {
+    return lines.map((line) {
+      final chars = line.split('');
+      return chars.reversed.map(_mirrorChar).join();
+    }).toList();
+  }
+
+  /// 개별 문자 미러링
+  String _mirrorChar(String char) {
+    return switch (char) {
+      '/' => r'\',
+      r'\' => '/',
+      '(' => ')',
+      ')' => '(',
+      '[' => ']',
+      ']' => '[',
+      '{' => '}',
+      '}' => '{',
+      '<' => '>',
+      '>' => '<',
+      'd' => 'b',
+      'b' => 'd',
+      'q' => 'p',
+      'p' => 'q',
+      _ => char,
+    };
+  }
+
   Widget _buildTurnIndicator() {
     return Container(
       padding: const EdgeInsets.symmetric(vertical: 8),