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

xiaomi/examples/14_business_scenario/main.go

@@ -40,10 +40,10 @@ func saveToDB(id int64, did, deviceType, changed string, state interface{}) {
 
 	// 同类化 state 拿到完整 State 结构体
 	switch s := state.(type) {
-	case bridge.ACState:
+	case bridge.ACProps:
 		log.Printf("[DB] 空调 %d/%s changed=%s: on=%v mode=%s target=%.1f current=%.1f",
 			id, did, changed, s.On, s.Mode, s.TargetTemperature, s.Temperature)
-	case bridge.LightState:
+	case bridge.LightProps:
 		log.Printf("[DB] 灯 %d/%s changed=%s: on=%v brightness=%d colorTemp=%d",
 			id, did, changed, s.On, s.Brightness, s.ColorTemperature)
 	default:
@@ -53,10 +53,10 @@ func saveToDB(id int64, did, deviceType, changed string, state interface{}) {
 
 func pushWS(id int64, did, deviceType, changed string, state interface{}) {
 	switch s := state.(type) {
-	case bridge.ACState:
+	case bridge.ACProps:
 		log.Printf("[WS→%d] 空调 %s changed=%s: on=%v mode=%s target=%.1f current=%.1f",
 			id, did, changed, s.On, s.Mode, s.TargetTemperature, s.Temperature)
-	case bridge.LightState:
+	case bridge.LightProps:
 		log.Printf("[WS→%d] 灯 %s changed=%s: on=%v brightness=%d",
 			id, did, changed, s.On, s.Brightness)
 	default:
@@ -92,7 +92,7 @@ func initBridge(ctx context.Context, pool *bridge.Pool, cfg UserCfg) error {
 	}
 
 	// 注册回调：MQTT 推送 → DB + WS
-	b.OnStateChanged(func(id int64, did, deviceType, changed string, state interface{}) {
+	b.OnPropsChanged(func(id int64, did, deviceType, changed string, state interface{}) {
 		saveToDB(id, did, deviceType, changed, state)
 		pushWS(id, did, deviceType, changed, state)
 	})
@@ -116,13 +116,13 @@ func controlAC(ctx context.Context, pool *bridge.Pool, id int64, did string) err
 	}
 
 	// 读缓存
-	state := ac.GetState()
+	state := ac.GetProps()
 	fmt.Printf("\n空调 %s:", did)
 	fmt.Printf("  on=%v mode=%s target=%.1f current=%.1f\n",
 		state.On, state.Mode, state.TargetTemperature, state.Temperature)
 
 	// 云端刷新
-	if s, err := ac.FetchState(ctx); err == nil {
+	if s, err := ac.FetchProps(ctx); err == nil {
 		fmt.Printf("  云端: on=%v mode=%s target=%.1f current=%.1f\n",
 			s.On, s.Mode, s.TargetTemperature, s.Temperature)
 	}
@@ -136,7 +136,7 @@ func controlAC(ctx context.Context, pool *bridge.Pool, id int64, did string) err
 	time.Sleep(1 * time.Second)
 
 	// 最终状态
-	final := ac.GetState()
+	final := ac.GetProps()
 	fmt.Printf("操作后: on=%v mode=%s target=%.1f current=%.1f\n",
 		final.On, final.Mode, final.TargetTemperature, final.Temperature)
 	return nil