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_device.go

@@ -7,7 +7,7 @@ import (
 	"strings"
 	"sync"
 
-	"xiaomihome/logger"
+	"github.com/sirupsen/logrus"
 )
 
 // ============================================================================
@@ -53,12 +53,9 @@ type MIoTDevice struct {
 
 	// Subscription lists (aligned with Python _device_state_sub_list / _value_sub_list)
 	deviceStateSubList map[string]map[string]func(string, interface{})
-	valueSubList        map[string]map[string]func(map[string]interface{}, interface{})
-	subID               int
-	subIDMu             sync.Mutex
-
-	// === Logger ===
-	lgr logger.Logger
+	valueSubList       map[string]map[string]func(map[string]interface{}, interface{})
+	subID              int
+	subIDMu            sync.Mutex
 }
 
 // NewMIoTDevice creates a new MIoTDevice.
@@ -68,12 +65,11 @@ type MIoTDevice struct {
 // specInstance: SPEC instance (can be nil, lazy loaded)
 func NewMIoTDevice(miotClient *MIoTClient, deviceInfo map[string]interface{}, specInstance *MIoTSpecInstance) *MIoTDevice {
 	dev := &MIoTDevice{
-		miotClient:          miotClient,
-		specInstance:        specInstance,
-		deviceStateSubList:  make(map[string]map[string]func(string, interface{})),
-		valueSubList:        make(map[string]map[string]func(map[string]interface{}, interface{})),
-		subDevices:          make(map[int]*MIoTDevice),
-		lgr:                 logger.Default(),
+		miotClient:         miotClient,
+		specInstance:       specInstance,
+		deviceStateSubList: make(map[string]map[string]func(string, interface{})),
+		valueSubList:       make(map[string]map[string]func(map[string]interface{}, interface{})),
+		subDevices:         make(map[int]*MIoTDevice),
 	}
 
 	if specInstance != nil {
@@ -140,9 +136,6 @@ func NewMIoTDevice(miotClient *MIoTClient, deviceInfo map[string]interface{}, sp
 	return dev
 }
 
-// SetLogger sets a custom logger for MIoTDevice.
-func (d *MIoTDevice) SetLogger(l logger.Logger) { d.lgr = l }
-
 // LoadFromCloud creates a MIoTDevice from cloud device data.
 // Aligns with Python: populating device_info from cloud response.
 func LoadFromCloud(miotClient *MIoTClient, cloudData map[string]interface{}) *MIoTDevice {
@@ -206,7 +199,7 @@ func (d *MIoTDevice) SetSpecInstance(specInstance *MIoTSpecInstance) {
 // Returns: subscription ID for unsubscribing.
 func (d *MIoTDevice) SubProp(siid, piid int, handler func(map[string]interface{}, interface{})) string {
 	if d.miotClient == nil {
-		d.lgr.Warnf("[MIoTDevice] Warning: miotClient is nil, cannot subscribe to property\n")
+		logrus.Warnf("[MIoTDevice] Warning: miotClient is nil, cannot subscribe to property\n")
 		return ""
 	}
 
@@ -229,7 +222,7 @@ func (d *MIoTDevice) SubProp(siid, piid int, handler func(map[string]interface{}
 // Aligns with Python MIoTDevice.unsub_prop.
 func (d *MIoTDevice) UnsubProp(subID string) {
 	if d.miotClient == nil {
-		d.lgr.Warnf("[MIoTDevice] Warning: miotClient is nil, cannot unsubscribe from property\n")
+		logrus.Warnf("[MIoTDevice] Warning: miotClient is nil, cannot unsubscribe from property\n")
 		return
 	}
 
@@ -255,7 +248,7 @@ func (d *MIoTDevice) UnsubProp(subID string) {
 // Returns: subscription ID for unsubscribing.
 func (d *MIoTDevice) SubEvent(siid, eiid int, handler func(map[string]interface{}, interface{})) string {
 	if d.miotClient == nil {
-		d.lgr.Warnf("[MIoTDevice] Warning: miotClient is nil, cannot subscribe to event\n")
+		logrus.Warnf("[MIoTDevice] Warning: miotClient is nil, cannot subscribe to event\n")
 		return ""
 	}
 
@@ -278,7 +271,7 @@ func (d *MIoTDevice) SubEvent(siid, eiid int, handler func(map[string]interface{
 // Aligns with Python MIoTDevice.unsub_event.
 func (d *MIoTDevice) UnsubEvent(subID string) {
 	if d.miotClient == nil {
-		d.lgr.Warnf("[MIoTDevice] Warning: miotClient is nil, cannot unsubscribe from event\n")
+		logrus.Warnf("[MIoTDevice] Warning: miotClient is nil, cannot unsubscribe from event\n")
 		return
 	}