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/devices/water_heater.go

@@ -15,13 +15,13 @@ type WaterHeater interface {
 	GetTargetTemp(ctx context.Context) (float64, error)
 	GetCurrentTemp(ctx context.Context) (float64, error)
 
-	OnStateChanged(handler func(state HeaterState, changed string)) (string, error)
-	GetState() HeaterState
-	FetchState(ctx context.Context) (HeaterState, error)
+	OnPropsChanged(handler func(props HeaterProps, changed string)) (string, error)
+	GetProps() HeaterProps
+	FetchProps(ctx context.Context) (HeaterProps, error)
 }
 
-// HeaterState 热水器状态（MQTT 缓存）
-type HeaterState struct {
+// HeaterProps 热水器状态（MQTT 缓存）
+type HeaterProps struct {
 	On          bool    `json:"on"`
 	TargetTemp  float64 `json:"targetTemperature"`
 	CurrentTemp float64 `json:"temperature"`
@@ -32,7 +32,7 @@ type waterHeaterDevice struct {
 	propOn          siidPiid
 	propTargetTemp  siidPiid
 	propCurrentTemp siidPiid
-	stateCache      HeaterState
+	propsCache      HeaterProps
 }
 
 func NewWaterHeater(client *xiaomi.Client, info *xiaomi.DeviceInfo) (WaterHeater, error) {
@@ -79,46 +79,46 @@ func (d *waterHeaterDevice) GetCurrentTemp(ctx context.Context) (float64, error)
 	return toFloat(prop.Value), nil
 }
 
-func (d *waterHeaterDevice) OnStateChanged(handler func(state HeaterState, changed string)) (string, error) {
-	type field struct{ siid, piid int; name string; fill func(*HeaterState, interface{}) }
+func (d *waterHeaterDevice) OnPropsChanged(handler func(props HeaterProps, changed string)) (string, error) {
+	type field struct{ siid, piid int; name string; fill func(*HeaterProps, interface{}) }
 	var fields []field
 	if d.propOn.valid {
-		fields = append(fields, field{d.propOn.siid, d.propOn.piid, "on", func(s *HeaterState, v interface{}) { s.On, _ = v.(bool) }})
+		fields = append(fields, field{d.propOn.siid, d.propOn.piid, "on", func(s *HeaterProps, v interface{}) { s.On, _ = v.(bool) }})
 	}
 	if d.propTargetTemp.valid {
-		fields = append(fields, field{d.propTargetTemp.siid, d.propTargetTemp.piid, "target-temperature", func(s *HeaterState, v interface{}) { s.TargetTemp = toFloat(v) }})
+		fields = append(fields, field{d.propTargetTemp.siid, d.propTargetTemp.piid, "target-temperature", func(s *HeaterProps, v interface{}) { s.TargetTemp = toFloat(v) }})
 	}
 	if d.propCurrentTemp.valid {
-		fields = append(fields, field{d.propCurrentTemp.siid, d.propCurrentTemp.piid, "temperature", func(s *HeaterState, v interface{}) { s.CurrentTemp = toFloat(v) }})
+		fields = append(fields, field{d.propCurrentTemp.siid, d.propCurrentTemp.piid, "temperature", func(s *HeaterProps, v interface{}) { s.CurrentTemp = toFloat(v) }})
 	}
 	if len(fields) == 0 { return "", xiaomi.ErrNotSupported }
 	return d.SubProp(0, 0, func(did string, prop *xiaomi.PropertyValue) {
 		for _, f := range fields {
 			if f.siid == prop.SIID && f.piid == prop.PIID {
-				f.fill(&d.stateCache, prop.Value)
-				handler(d.stateCache, f.name)
+				f.fill(&d.propsCache, prop.Value)
+				handler(d.propsCache, f.name)
 				return
 			}
 		}
 	})
 }
 
-func (d *waterHeaterDevice) GetState() HeaterState { return d.stateCache }
-func (d *waterHeaterDevice) FetchState(ctx context.Context) (HeaterState, error) {
+func (d *waterHeaterDevice) GetProps() HeaterProps { return d.propsCache }
+func (d *waterHeaterDevice) FetchProps(ctx context.Context) (HeaterProps, error) {
 	keys := []xiaomi.PropKey{}
 	if d.propOn.valid { keys = append(keys, xiaomi.PropKey{DID: d.info.DID, SIID: d.propOn.siid, PIID: d.propOn.piid}) }
 	if d.propTargetTemp.valid { keys = append(keys, xiaomi.PropKey{DID: d.info.DID, SIID: d.propTargetTemp.siid, PIID: d.propTargetTemp.piid}) }
 	if d.propCurrentTemp.valid { keys = append(keys, xiaomi.PropKey{DID: d.info.DID, SIID: d.propCurrentTemp.siid, PIID: d.propCurrentTemp.piid}) }
 	props, err := d.client.GetProps(ctx, keys)
-	if err != nil { return d.stateCache, err }
-	state := HeaterState{}
+	if err != nil { return d.propsCache, err }
+	result := HeaterProps{}
 	for _, p := range props {
 		switch {
-		case d.propOn.valid && p.SIID == d.propOn.siid && p.PIID == d.propOn.piid: state.On, _ = p.Value.(bool)
-		case d.propTargetTemp.valid && p.SIID == d.propTargetTemp.siid && p.PIID == d.propTargetTemp.piid: state.TargetTemp = toFloat(p.Value)
-		case d.propCurrentTemp.valid && p.SIID == d.propCurrentTemp.siid && p.PIID == d.propCurrentTemp.piid: state.CurrentTemp = toFloat(p.Value)
+		case d.propOn.valid && p.SIID == d.propOn.siid && p.PIID == d.propOn.piid: result.On, _ = p.Value.(bool)
+		case d.propTargetTemp.valid && p.SIID == d.propTargetTemp.siid && p.PIID == d.propTargetTemp.piid: result.TargetTemp = toFloat(p.Value)
+		case d.propCurrentTemp.valid && p.SIID == d.propCurrentTemp.siid && p.PIID == d.propCurrentTemp.piid: result.CurrentTemp = toFloat(p.Value)
 		}
 	}
-	d.stateCache = state
-	return state, nil
+	d.propsCache = result
+	return result, nil
 }