refactor(logger): 日志改用 logrus 全局包级调用，移除 Logger 注入接口

为什么：并入宿主项目后须与宿主日志体系一致——宿主统一用 pkg/logger 初始化
logrus 全局实例并直接 logrus.Xxx 包级调用；包一层 Logger 接口会让 logrus 的
caller 定位（报告调用文件:行号）失准。

改动：
- 删除 logger 包（Logger 接口 / Default / SetDefault，默认本就是 logrus.StandardLogger）
- 11 个结构体移除 lgr logger.Logger 字段、SetLogger 方法及构造中的 lgr 初始化
- 192 处 lgr.Xxxf 调用改为 logrus.Xxxf，日志消息文本保持不变
- xiaomi.Client 移除 Logger() 访问器，air_conditioner 回读日志去掉判空调用直连 logrus
- miot_i18n.go 两处标准库 log.Printf 改为 logrus.Errorf，统一日志出口
- go.mod：logrus 从 indirect 提升为直接依赖
- goimports/goformat 全树规范化：此前部分文件未 gofmt（单行 if、对齐），本次顺带
  格式化，纯空白/换行变化，无逻辑改动

验证：go build / go vet / go test ./... 全部通过（bridge、miot、xiaomi、devices、specs）

miot/miot_mdns.go

@@ -12,8 +12,7 @@ import (
 	"time"
 
 	"github.com/hashicorp/mdns"
-
-	"xiaomihome/logger"
+	"github.com/sirupsen/logrus"
 )
 
 // ============================================================================
@@ -166,7 +165,6 @@ type MipsService struct {
 	mu       sync.Mutex
 	services map[string]*MipsServiceData // keyed by groupID
 	subs     map[subKey]MipsServiceChangeHandler
-	lgr      logger.Logger
 
 	stopCh chan struct{}
 }
@@ -182,14 +180,10 @@ func NewMipsService() *MipsService {
 	s := &MipsService{
 		services: make(map[string]*MipsServiceData),
 		subs:     make(map[subKey]MipsServiceChangeHandler),
-		lgr:      logger.Default(),
 	}
 	return s
 }
 
-// SetLogger sets a custom logger for MipsService.
-func (s *MipsService) SetLogger(l logger.Logger) { s.lgr = l }
-
 // Init starts the mDNS browser in a background goroutine.
 // Safe to call multiple times; subsequent calls after the first are no-ops
 // unless preceded by Deinit().
@@ -203,7 +197,7 @@ func (s *MipsService) Init() {
 	s.mu.Unlock()
 
 	go s.runBrowser()
-	s.lgr.Infof("[mdns] mips service browser started")
+	logrus.Infof("[mdns] mips service browser started")
 }
 
 // Deinit stops the browser goroutine and clears all cached services and
@@ -225,7 +219,7 @@ func (s *MipsService) Deinit() {
 	s.subs = make(map[subKey]MipsServiceChangeHandler)
 	s.mu.Unlock()
 
-	s.lgr.Infof("[mdns] mips service deinitialized")
+	logrus.Infof("[mdns] mips service deinitialized")
 }
 
 // GetServices returns cached services. When groupID is non-empty, only that
@@ -289,7 +283,7 @@ func (s *MipsService) runBrowser() {
 		// Run the blocking Query in a goroutine so we can detect stop.
 		go func() {
 			if err := mdns.Query(params); err != nil {
-				s.lgr.Debugf("[mdns] query error: %v", err)
+				logrus.Debugf("[mdns] query error: %v", err)
 			}
 			close(entriesCh)
 		}()
@@ -311,7 +305,7 @@ func (s *MipsService) runBrowser() {
 func (s *MipsService) handleEntry(entry *mdns.ServiceEntry) {
 	svc, err := entryToServiceData(entry)
 	if err != nil {
-		s.lgr.Debugf("[mdns] skip entry: %v", err)
+		logrus.Debugf("[mdns] skip entry: %v", err)
 		return
 	}
 	if !svc.validService() {
@@ -339,7 +333,7 @@ func (s *MipsService) handleEntry(entry *mdns.ServiceEntry) {
 // callSubsLocked notifies all subscribers whose groupID matches.
 // Caller MUST hold s.mu.
 func (s *MipsService) callSubsLocked(groupID string, state MipsServiceState, data map[string]interface{}) {
-	s.lgr.Infof("[mdns] service change: groupID=%s, state=%s", groupID, state)
+	logrus.Infof("[mdns] service change: groupID=%s, state=%s", groupID, state)
 	for sk, handler := range s.subs {
 		if sk.groupID == groupID || sk.groupID == "*" {
 			go handler(groupID, state, data)