feat: State→Props 命名统一 + 新增 Plug/Gateway 设备 + 分类系统重构

**命名统一（State → Props）**
- 所有设备类型：XxxState → XxxProps，GetState() → GetProps()，FetchState() → FetchProps()
- 回调接口：OnStateChanged → OnPropsChanged
- Bridge 层类型别名、示例代码、文档同步更名

**新增设备类型**
- KindPlug + Plug 驱动：智能插座/插头（TurnOn/TurnOff/IsOn/OnPropsChanged）
- KindGateway + Gateway 驱动：网关设备类型识别
- KindOccupancySensor 从 KindSensor 独立，添加 OccupancyProps

**设备分类系统改进**
- classifyByModel 改为按 key 长度降序匹配（防止 sensor 先于 sensor-occupy）
- 新增下划线变体识别（sensor_occupy、sensor_temp 等）
- outlet 重新归类为 Plug（非 Switch）
- 新增 Or() 组合过滤器

**连接桥增强**
- 设备创建成功后自动订阅属性变更
- 新增 nil 防护检查
- 支持 Plug/Speaker/Gateway/Occupancy 类型的 FetchProps 刷新
- 日志级别 Info → Debug

**AC 驱动增强**
- 新增 HasPower()、GetElectricPower()、GetPowerConsumption() 功率接口
- ACProps 新增 ElectricPower、PowerConsumption 字段
- valMapper：Desc 为空时 fallback 用 Name，key 统一小写

**MIoT 核心**
- 设备列表刷新改用 reflect.DeepEqual 全字段变更检测
- 移除 BLE/代理设备默认在线 hack
- RefreshDeviceAllProps 增加离线检查
- 新增 miot_errors.go：MIoT 错误码定义
- 全局日志级别 Info→Debug/Warn（降低噪音）

**示例与文档**
- 所有示例代码同步 API 变更
- 传感器示例改用 Or 组合过滤器
- ARCH_PLAN 等迁移文档同步更新

miot/miot_client_sub.go

@@ -25,7 +25,7 @@ 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.Infof("[MIoTClient] Subscribed to property: %s (topic=%s, subID=%s)\n", did, topic, subID)
+	c.lgr.Debugf("[MIoTClient] Subscribed to property: %s (topic=%s, subID=%s)\n", did, topic, subID)
 
 	c.mu.Unlock()
 
@@ -52,7 +52,7 @@ func (c *MIoTClient) UnsubProp(did string, subID string) {
 	// TODO: Implement proper tracking of per-device subscription count
 	// For now, just log
 
-	c.lgr.Infof("[MIoTClient] Unsubscribed from property: %s (subID=%s)\n", did, subID)
+	c.lgr.Debugf("[MIoTClient] Unsubscribed from property: %s (subID=%s)\n", did, subID)
 }
 
 // SubEvent subscribes to device events.
@@ -69,7 +69,7 @@ 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.Infof("[MIoTClient] Subscribed to event: %s (topic=%s, subID=%s)\n", did, topic, subID)
+	c.lgr.Debugf("[MIoTClient] Subscribed to event: %s (topic=%s, subID=%s)\n", did, topic, subID)
 
 	return subID
 }
@@ -83,7 +83,7 @@ func (c *MIoTClient) UnsubEvent(did string, subID string) {
 	// Remove from subTree by subID
 	c.subTree.Unsub(subID)
 
-	c.lgr.Infof("[MIoTClient] Unsubscribed from event: %s (subID=%s)\n", did, subID)
+	c.lgr.Debugf("[MIoTClient] Unsubscribed from event: %s (subID=%s)\n", did, subID)
 }
 
 // updateDeviceMsgSub updates device message subscription.
@@ -260,7 +260,7 @@ 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.Infof("[MIoTClient] handleMIPSMessage: empty or invalid payload for %s (%d bytes)\n", did, len(payload))
+		c.lgr.Debugf("[MIoTClient] handleMIPSMessage: empty or invalid payload for %s (%d bytes)\n", did, len(payload))
 		return
 	}
 
@@ -289,7 +289,7 @@ func (c *MIoTClient) dispatchMIPSMessage(did string, params map[string]interface
 	} else if _, ok := params["eiid"]; ok {
 		c.OnEventMsg(params, nil)
 	} else {
-		c.lgr.Infof("[MIoTClient] handleMIPSMessage: unknown message format for %s: %v\n", did, params)
+		c.lgr.Debugf("[MIoTClient] handleMIPSMessage: unknown message format for %s: %v\n", did, params)
 	}
 }
 
@@ -301,7 +301,7 @@ func (c *MIoTClient) handleMIPSStateMessage(did string, payload []byte) {
 		// Fallback: binary MIPS protocol
 		msg := UnpackMipsMessage(payload)
 		if msg == nil || msg.Payload == "" {
-			c.lgr.Infof("[MIoTClient] handleMIPSStateMessage: empty payload for %s (%d bytes)\n", did, len(payload))
+			c.lgr.Debugf("[MIoTClient] handleMIPSStateMessage: empty payload for %s (%d bytes)\n", did, len(payload))
 			return
 		}
 		if err := json.Unmarshal([]byte(msg.Payload), &params); err != nil {
@@ -326,7 +326,7 @@ func (c *MIoTClient) handleMIPSStateMessage(did string, payload []byte) {
 	}
 
 	if len(state) == 0 {
-		c.lgr.Infof("[MIoTClient] handleMIPSStateMessage: no state info in payload for %s: %v\n", did, params)
+		c.lgr.Debugf("[MIoTClient] handleMIPSStateMessage: no state info in payload for %s: %v\n", did, params)
 		return
 	}
 
@@ -372,7 +372,7 @@ func (c *MIoTClient) OnPropMsg(params map[string]interface{}, ctx interface{}) {
 	}
 
 	if did == "" {
-		c.lgr.Infof("[MIoTClient] OnPropMsg: missing did in params=%v\n", params)
+		c.lgr.Debugf("[MIoTClient] OnPropMsg: missing did in params=%v\n", params)
 		return
 	}
 
@@ -424,7 +424,7 @@ func (c *MIoTClient) OnEventMsg(params map[string]interface{}, ctx interface{})
 	}
 
 	if did == "" {
-		c.lgr.Infof("[MIoTClient] OnEventMsg: missing did in params=%v\n", params)
+		c.lgr.Debugf("[MIoTClient] OnEventMsg: missing did in params=%v\n", params)
 		return
 	}