refactor(ui): 배속 버튼 UI 단순화

- 1x/2x 사이클 버튼 + 광고배속 버튼 → 5x/20x 토글 버튼 하나로 변경
- 부스트 활성화 중: 반투명, 비활성 상태
- 부스트 비활성화: 불투명, 클릭 가능
- _RetroSpeedChip에 isDisabled 파라미터 추가

lib/src/features/game/layouts/mobile_carousel_layout.dart

@@ -55,6 +55,7 @@ class MobileCarouselLayout extends StatefulWidget {
     this.speedBoostEndMs,
     this.isPaidUser = false,
     this.onSpeedBoostActivate,
+    this.isSpeedBoostActive = false,
     this.onSetSpeed,
     this.adSpeedMultiplier = 5,
     this.has2xUnlocked = false,
@@ -121,6 +122,9 @@ class MobileCarouselLayout extends StatefulWidget {
   /// 광고 배속 활성화 콜백 (광고 시청)
   final VoidCallback? onSpeedBoostActivate;
 
+  /// 배속 부스트 활성화 여부
+  final bool isSpeedBoostActive;
+
   /// 광고 배속 배율 (릴리즈: 5x, 디버그빌드+디버그모드: 20x)
   final int adSpeedMultiplier;
 
@@ -541,59 +545,26 @@ class _MobileCarouselLayoutState extends State<MobileCarouselLayout> {
   }
 
   /// 레트로 스타일 속도 선택기
+  ///
+  /// - 5x/20x 토글 버튼 하나만 표시
+  /// - 부스트 활성화 중: 반투명, 비활성 (누를 수 없음)
+  /// - 부스트 비활성화: 불투명, 활성 (누를 수 있음)
   Widget _buildRetroSpeedSelector(BuildContext context) {
-    final currentElapsedMs = widget.state.skillSystem.elapsedMs;
-    final speedBoostEndMs = widget.speedBoostEndMs ?? 0;
-    final isSpeedBoostActive =
-        speedBoostEndMs > currentElapsedMs || widget.isPaidUser;
+    final isSpeedBoostActive = widget.isSpeedBoostActive;
     final adSpeed = widget.adSpeedMultiplier;
 
-    void setSpeed(int speed) {
-      if (widget.onSetSpeed != null) {
-        widget.onSetSpeed!(speed);
-      } else {
-        widget.onSpeedCycle();
-      }
-    }
-
-    return Row(
-      mainAxisSize: MainAxisSize.min,
-      children: [
-        // 1x 버튼
-        _RetroSpeedChip(
-          speed: 1,
-          isSelected: widget.speedMultiplier == 1 && !isSpeedBoostActive,
-          onTap: () {
-            setSpeed(1);
-            Navigator.pop(context);
-          },
-        ),
-        // 2x 버튼 (명예의 전당 해금 시)
-        if (widget.has2xUnlocked) ...[
-          const SizedBox(width: 4),
-          _RetroSpeedChip(
-            speed: 2,
-            isSelected: widget.speedMultiplier == 2 && !isSpeedBoostActive,
-            onTap: () {
-              setSpeed(2);
-              Navigator.pop(context);
-            },
-          ),
-        ],
-        const SizedBox(width: 4),
-        // 광고배속 버튼
-        _RetroSpeedChip(
-          speed: adSpeed,
-          isSelected: isSpeedBoostActive,
-          isAdBased: !isSpeedBoostActive && !widget.isPaidUser,
-          onTap: () {
-            if (!isSpeedBoostActive) {
-              widget.onSpeedBoostActivate?.call();
-            }
-            Navigator.pop(context);
-          },
-        ),
-      ],
+    return _RetroSpeedChip(
+      speed: adSpeed,
+      isSelected: isSpeedBoostActive,
+      isAdBased: !isSpeedBoostActive && !widget.isPaidUser,
+      // 부스트 활성화 중이면 비활성 (반투명)
+      isDisabled: isSpeedBoostActive,
+      onTap: () {
+        if (!isSpeedBoostActive) {
+          widget.onSpeedBoostActivate?.call();
+        }
+        Navigator.pop(context);
+      },
     );
   }
 
@@ -653,6 +624,7 @@ class _MobileCarouselLayoutState extends State<MobileCarouselLayout> {
               speedBoostEndMs: widget.speedBoostEndMs,
               isPaidUser: widget.isPaidUser,
               onSpeedBoostActivate: widget.onSpeedBoostActivate,
+              isSpeedBoostActive: widget.isSpeedBoostActive,
               adSpeedMultiplier: widget.adSpeedMultiplier,
             ),
 
@@ -835,6 +807,7 @@ class _RetroSpeedChip extends StatelessWidget {
     required this.isSelected,
     required this.onTap,
     this.isAdBased = false,
+    this.isDisabled = false,
   });
 
   final int speed;
@@ -842,32 +815,41 @@ class _RetroSpeedChip extends StatelessWidget {
   final VoidCallback onTap;
   final bool isAdBased;
 
+  /// 비활성 상태 (반투명, 탭 무시)
+  final bool isDisabled;
+
   @override
   Widget build(BuildContext context) {
     final gold = RetroColors.goldOf(context);
     final warning = RetroColors.warningOf(context);
     final border = RetroColors.borderOf(context);
 
+    // 비활성 상태면 반투명 처리
+    final opacity = isDisabled ? 0.4 : 1.0;
+
     final Color bgColor;
     final Color textColor;
     final Color borderColor;
 
     if (isSelected) {
-      bgColor = isAdBased ? warning.withValues(alpha: 0.3) : gold.withValues(alpha: 0.3);
-      textColor = isAdBased ? warning : gold;
-      borderColor = isAdBased ? warning : gold;
+      bgColor = isAdBased
+          ? warning.withValues(alpha: 0.3 * opacity)
+          : gold.withValues(alpha: 0.3 * opacity);
+      textColor = (isAdBased ? warning : gold).withValues(alpha: opacity);
+      borderColor = (isAdBased ? warning : gold).withValues(alpha: opacity);
     } else if (isAdBased) {
       bgColor = Colors.transparent;
-      textColor = warning;
-      borderColor = warning;
+      textColor = warning.withValues(alpha: opacity);
+      borderColor = warning.withValues(alpha: opacity);
     } else {
       bgColor = Colors.transparent;
-      textColor = RetroColors.textMutedOf(context);
-      borderColor = border;
+      textColor = RetroColors.textMutedOf(context).withValues(alpha: opacity);
+      borderColor = border.withValues(alpha: opacity);
     }
 
     return GestureDetector(
-      onTap: onTap,
+      // 비활성 상태면 탭 무시
+      onTap: isDisabled ? null : onTap,
       child: Container(
         padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
         decoration: BoxDecoration(
@@ -877,7 +859,7 @@ class _RetroSpeedChip extends StatelessWidget {
         child: Row(
           mainAxisSize: MainAxisSize.min,
           children: [
-            if (isAdBased && !isSelected)
+            if (isAdBased && !isSelected && !isDisabled)
               Padding(
                 padding: const EdgeInsets.only(right: 2),
                 child: Text(

lib/src/features/game/widgets/enhanced_animation_panel.dart

@@ -41,6 +41,7 @@ class EnhancedAnimationPanel extends StatefulWidget {
     this.speedBoostEndMs,
     this.isPaidUser = false,
     this.onSpeedBoostActivate,
+    this.isSpeedBoostActive = false,
     this.adSpeedMultiplier = 5,
   });
 
@@ -82,6 +83,9 @@ class EnhancedAnimationPanel extends StatefulWidget {
   /// 광고 배속 활성화 콜백 (광고 시청)
   final VoidCallback? onSpeedBoostActivate;
 
+  /// 배속 부스트 활성화 여부
+  final bool isSpeedBoostActive;
+
   /// 광고 배속 배율 (릴리즈: 5x, 디버그빌드+디버그모드: 20x)
   final int adSpeedMultiplier;
 
@@ -676,83 +680,53 @@ class _EnhancedAnimationPanelState extends State<EnhancedAnimationPanel>
 
   /// 속도 컨트롤 버튼 (태스크 프로그레스 바 우측)
   ///
-  /// - 일반배속: 1x (기본) ↔ 2x (명예의 전당 해금)
-  /// - 광고배속: 릴리즈 5x, 디버그빌드+디버그모드 20x
+  /// - 5x/20x 토글 버튼 하나만 표시
+  /// - 부스트 활성화 중: 반투명, 비활성 (누를 수 없음)
+  /// - 부스트 비활성화: 불투명, 활성 (누를 수 있음)
   Widget _buildSpeedControls() {
-    final isSpeedBoostActive = _speedBoostRemainingMs > 0 || widget.isPaidUser;
+    final isSpeedBoostActive = widget.isSpeedBoostActive;
     final adSpeed = widget.adSpeedMultiplier;
-    // 2x일 때 광고 버튼 표시 (버프 비활성이고 무료유저)
-    final showAdButton =
-        widget.speedMultiplier == 2 && !isSpeedBoostActive && !widget.isPaidUser;
+    final isPaidUser = widget.isPaidUser;
 
-    return Row(
-      mainAxisSize: MainAxisSize.min,
-      children: [
-        // 속도 사이클 버튼 (1x ↔ 2x, 버프 활성시 광고배속)
-        SizedBox(
-          width: 44,
-          height: 32,
-          child: OutlinedButton(
-            onPressed: widget.onSpeedCycle,
-            style: OutlinedButton.styleFrom(
-              padding: EdgeInsets.zero,
-              side: BorderSide(
-                color: isSpeedBoostActive
-                    ? Colors.orange
-                    : widget.speedMultiplier > 1
-                        ? Theme.of(context).colorScheme.primary
-                        : Theme.of(context).colorScheme.outline,
-                width: isSpeedBoostActive ? 2 : 1,
+    // 부스트 활성화 중이면 반투명
+    final opacity = isSpeedBoostActive ? 0.4 : 1.0;
+
+    return SizedBox(
+      width: 52,
+      height: 32,
+      child: OutlinedButton(
+        // 부스트 활성화 중이면 누를 수 없음
+        onPressed: isSpeedBoostActive ? null : widget.onSpeedBoostActivate,
+        style: OutlinedButton.styleFrom(
+          padding: EdgeInsets.zero,
+          side: BorderSide(
+            color: Colors.orange.withValues(alpha: opacity),
+            width: isSpeedBoostActive ? 2 : 1.5,
+          ),
+          disabledForegroundColor: Colors.orange.withValues(alpha: 0.4),
+        ),
+        child: Row(
+          mainAxisAlignment: MainAxisAlignment.center,
+          children: [
+            // 무료유저 + 비활성 상태면 AD 아이콘 표시
+            if (!isPaidUser && !isSpeedBoostActive) ...[
+              const Text(
+                '▶',
+                style: TextStyle(fontSize: 9, color: Colors.orange),
               ),
-            ),
-            child: Text(
-              isSpeedBoostActive ? '${adSpeed}x' : '${widget.speedMultiplier}x',
+              const SizedBox(width: 2),
+            ],
+            Text(
+              '${adSpeed}x',
               style: TextStyle(
                 fontSize: 13,
                 fontWeight: FontWeight.bold,
-                color: isSpeedBoostActive
-                    ? Colors.orange
-                    : widget.speedMultiplier > 1
-                        ? Theme.of(context).colorScheme.primary
-                        : null,
+                color: Colors.orange.withValues(alpha: opacity),
               ),
             ),
-          ),
+          ],
         ),
-        // 광고 배속 버튼 (2x일 때만 표시)
-        if (showAdButton) ...[
-          const SizedBox(width: 4),
-          SizedBox(
-            width: 52,
-            height: 32,
-            child: OutlinedButton(
-              onPressed: widget.onSpeedBoostActivate,
-              style: OutlinedButton.styleFrom(
-                padding: EdgeInsets.zero,
-                side: const BorderSide(color: Colors.orange, width: 1.5),
-              ),
-              child: Row(
-                mainAxisAlignment: MainAxisAlignment.center,
-                children: [
-                  const Text(
-                    '▶',
-                    style: TextStyle(fontSize: 9, color: Colors.orange),
-                  ),
-                  const SizedBox(width: 2),
-                  Text(
-                    '${adSpeed}x',
-                    style: const TextStyle(
-                      fontSize: 13,
-                      fontWeight: FontWeight.bold,
-                      color: Colors.orange,
-                    ),
-                  ),
-                ],
-              ),
-            ),
-          ),
-        ],
-      ],
+      ),
     );
   }