refactor(middleware): 调整中间件执行顺序和代码格式化

- 调整中间件执行顺序：将 TimeoutOver 移至 SoundStart 之前，确保超时检查在音频播放前生效
- 简化 BGM 停止逻辑：移除 select 语句中的多余花括号
- 修正导入顺序：将 sync 标准库导入置于第三方库之前

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

internal/middleware/bgm.go

@@ -5,9 +5,10 @@ import (
 	"game-driver/leaf"
 	"game-driver/pkg/audio"
 	"game-driver/pkg/utils"
+	"sync"
+
 	"github.com/gopxl/beep/v2/speaker"
 	"go.uber.org/zap"
-	"sync"
 )
 
 // PlayBgm 播放背景音乐
@@ -44,15 +45,11 @@ func PlayBgm() leaf.HandlerFunc {
 					return
 				}
 
-				select {
+				<-a
-				case <-a:
+
-					{
+				speaker.Lock()
-						speaker.Lock()
+				ctrl.Streamer = nil
-						ctrl.Streamer = nil
+				speaker.Unlock()
-						speaker.Unlock()
-						return
-					}
-				}
 			}()
 		} else {
 			zap.S().Infoln("未解析到背景音乐")

internal/server.go

@@ -143,9 +143,9 @@ func Run() {
 		middleware.DeviceLock(device),
 		middleware.PauseWait(common.PassCtrl),
 		middleware.EmergencyStop(common.GlobalStopper),
+		middleware.TimeoutOver(config.C.MaxTimeout),
 		middleware.SoundStart(),
 		middleware.RelayMaster(r),
-		middleware.TimeoutOver(config.C.MaxTimeout),
 		middleware.TickerAction(),
 		middleware.PlayBgm(),
 		routes.PlayRouter(ctx, config.C.Location, config.C.Point),