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_client_sub.go

@@ -5,6 +5,8 @@ package miot
 import (
 	"encoding/json"
 	"fmt"
+
+	"github.com/sirupsen/logrus"
 )
 
 // ============================================================================
@@ -25,7 +27,7 @@ func (c *MIoTClient) SubProp(did string, handler func(map[string]interface{}, in
 	subID := fmt.Sprintf("%p", handler)
 	c.subTree.Sub(topic, handler, nil)
 
-	c.lgr.Debugf("[MIoTClient] Subscribed to property: %s (topic=%s, subID=%s)\n", did, topic, subID)
+	logrus.Debugf("[MIoTClient] Subscribed to property: %s (topic=%s, subID=%s)\n", did, topic, subID)
 
 	c.mu.Unlock()
 
@@ -52,7 +54,7 @@ func (c *MIoTClient) UnsubProp(did string, subID string) {
 	// TODO: Implement proper tracking of per-device subscription count
 	// For now, just log
 
-	c.lgr.Debugf("[MIoTClient] Unsubscribed from property: %s (subID=%s)\n", did, subID)
+	logrus.Debugf("[MIoTClient] Unsubscribed from property: %s (subID=%s)\n", did, subID)
 }
 
 // SubEvent subscribes to device events.
@@ -69,7 +71,7 @@ func (c *MIoTClient) SubEvent(did string, handler func(map[string]interface{}, i
 	subID := fmt.Sprintf("%p", handler)
 	c.subTree.Sub(topic, handler, nil)
 
-	c.lgr.Debugf("[MIoTClient] Subscribed to event: %s (topic=%s, subID=%s)\n", did, topic, subID)
+	logrus.Debugf("[MIoTClient] Subscribed to event: %s (topic=%s, subID=%s)\n", did, topic, subID)
 
 	return subID
 }
@@ -83,7 +85,7 @@ func (c *MIoTClient) UnsubEvent(did string, subID string) {
 	// Remove from subTree by subID
 	c.subTree.Unsub(subID)
 
-	c.lgr.Debugf("[MIoTClient] Unsubscribed from event: %s (subID=%s)\n", did, subID)
+	logrus.Debugf("[MIoTClient] Unsubscribed from event: %s (subID=%s)\n", did, subID)
 }
 
 // updateDeviceMsgSub updates device message subscription.
@@ -155,7 +157,7 @@ func (c *MIoTClient) updateDeviceMsgSub(did string) {
 	// Update subscription source
 	c.subSourceList[did] = newSource
 
-	c.lgr.Debugf("[MIoTClient] updateDeviceMsgSub: %s source %s → %s (gw=%v/%v, lan=%v/%v, cloud=%v)\n",
+	logrus.Debugf("[MIoTClient] updateDeviceMsgSub: %s source %s → %s (gw=%v/%v, lan=%v/%v, cloud=%v)\n",
 		did, oldSource, newSource, gwOnline, gwPushAvailable, lanOnline, lanPushAvailable, cloudOnline)
 }
 
@@ -260,13 +262,13 @@ func (c *MIoTClient) handleMIPSMessage(did string, payload []byte) {
 	// Fallback: binary MIPS protocol (used by gateway mipsLocal)
 	msg := UnpackMipsMessage(payload)
 	if msg == nil || msg.Payload == "" {
-		c.lgr.Debugf("[MIoTClient] handleMIPSMessage: empty or invalid payload for %s (%d bytes)\n", did, len(payload))
+		logrus.Debugf("[MIoTClient] handleMIPSMessage: empty or invalid payload for %s (%d bytes)\n", did, len(payload))
 		return
 	}
 
 	// Parse JSON from unpacked payload
 	if err := json.Unmarshal([]byte(msg.Payload), &params); err != nil {
-		c.lgr.Errorf("[MIoTClient] handleMIPSMessage: JSON parse error for %s: %v\n", did, err)
+		logrus.Errorf("[MIoTClient] handleMIPSMessage: JSON parse error for %s: %v\n", did, err)
 		return
 	}
 
@@ -289,7 +291,7 @@ func (c *MIoTClient) dispatchMIPSMessage(did string, params map[string]interface
 	} else if _, ok := params["eiid"]; ok {
 		c.OnEventMsg(params, nil)
 	} else {
-		c.lgr.Debugf("[MIoTClient] handleMIPSMessage: unknown message format for %s: %v\n", did, params)
+		logrus.Debugf("[MIoTClient] handleMIPSMessage: unknown message format for %s: %v\n", did, params)
 	}
 }
 
@@ -301,11 +303,11 @@ func (c *MIoTClient) handleMIPSStateMessage(did string, payload []byte) {
 		// Fallback: binary MIPS protocol
 		msg := UnpackMipsMessage(payload)
 		if msg == nil || msg.Payload == "" {
-			c.lgr.Debugf("[MIoTClient] handleMIPSStateMessage: empty payload for %s (%d bytes)\n", did, len(payload))
+			logrus.Debugf("[MIoTClient] handleMIPSStateMessage: empty payload for %s (%d bytes)\n", did, len(payload))
 			return
 		}
 		if err := json.Unmarshal([]byte(msg.Payload), &params); err != nil {
-			c.lgr.Errorf("[MIoTClient] handleMIPSStateMessage: JSON parse error for %s: %v\n", did, err)
+			logrus.Errorf("[MIoTClient] handleMIPSStateMessage: JSON parse error for %s: %v\n", did, err)
 			return
 		}
 	}
@@ -326,7 +328,7 @@ func (c *MIoTClient) handleMIPSStateMessage(did string, payload []byte) {
 	}
 
 	if len(state) == 0 {
-		c.lgr.Debugf("[MIoTClient] handleMIPSStateMessage: no state info in payload for %s: %v\n", did, params)
+		logrus.Debugf("[MIoTClient] handleMIPSStateMessage: no state info in payload for %s: %v\n", did, params)
 		return
 	}
 
@@ -372,7 +374,7 @@ func (c *MIoTClient) OnPropMsg(params map[string]interface{}, ctx interface{}) {
 	}
 
 	if did == "" {
-		c.lgr.Debugf("[MIoTClient] OnPropMsg: missing did in params=%v\n", params)
+		logrus.Debugf("[MIoTClient] OnPropMsg: missing did in params=%v\n", params)
 		return
 	}
 
@@ -424,7 +426,7 @@ func (c *MIoTClient) OnEventMsg(params map[string]interface{}, ctx interface{})
 	}
 
 	if did == "" {
-		c.lgr.Debugf("[MIoTClient] OnEventMsg: missing did in params=%v\n", params)
+		logrus.Debugf("[MIoTClient] OnEventMsg: missing did in params=%v\n", params)
 		return
 	}