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

bridge/bridge.go

@@ -9,7 +9,7 @@
 //	b, _ := pool.Get(id)
 //	ac, _ := b.AC("did")
 //	ac.TurnOn(ctx)
-//	state := ac.GetState()
+//	state := ac.GetProps()
 package bridge
 
 import (
@@ -25,14 +25,22 @@ import (
 // ── 类型别名：业务层不需要 import devices ──
 
 type (
-	ACState          = devices.ACState
-	LightState       = devices.LightState
-	FanState         = devices.FanState
-	HumidifierState  = devices.HumidifierState
-	HeaterState      = devices.HeaterState
-	VacuumStatus     = devices.VacuumStatus
+	ACProps          = devices.ACProps
+	LightProps       = devices.LightProps
+	FanProps         = devices.FanProps
+	HumidifierProps  = devices.HumidifierProps
+	HeaterProps      = devices.HeaterProps
+	VacuumProps     = devices.VacuumProps
+	SwitchProps      = devices.SwitchProps
+	SpeakerProps     = devices.SpeakerProps
+	PlugProps        = devices.PlugProps
 )
 
+// OccupancyProps 人体传感器状态（有人/无人）。
+type OccupancyProps struct {
+	Occupied bool `json:"occupied"`
+}
+
 // ── Pool ──
 
 // Pool 全局路由：id → Bridge。
@@ -103,7 +111,8 @@ type Bridge struct {
 	mu     sync.RWMutex
 	dv     map[string]interface{} // DID → devices.Xxx interface
 
-	onStateChanged func(id int64, did, deviceType, changed string, state interface{})
+	onPropsChanged  func(id int64, did, deviceType, changed string, props interface{})
+	onOnlineChanged func(id int64, did string, online bool)
 }
 
 func newBridge(ctx context.Context, id int64, uuid string, auth xiaomi.AuthInfo, dataDir string, homeIDs []int64) (*Bridge, error) {
@@ -162,18 +171,20 @@ func (b *Bridge) Devices() map[string]string {
 
 func deviceTypeName(d interface{}) string {
 	switch d.(type) {
-	case devices.AirConditioner: return "air_conditioner"
-	case devices.Light:          return "light"
-	case devices.Switch:         return "switch"
-	case devices.Fan:            return "fan"
-	case devices.Cover:          return "cover"
-	case devices.Humidifier:     return "humidifier"
-	case devices.Vacuum:         return "vacuum"
-	case devices.WaterHeater:    return "water_heater"
-	case devices.Thermostat:     return "thermostat"
-	case devices.TempHumiditySensor: return "temp_humidity_sensor"
-	case devices.OccupancySensor: return "occupancy_sensor"
-	case devices.Speaker: return "speaker"
+	case devices.AirConditioner:   return devices.TypeAirConditioner
+	case devices.Light:            return devices.TypeLight
+	case devices.Switch:           return devices.TypeSwitch
+	case devices.Fan:              return devices.TypeFan
+	case devices.Cover:            return devices.TypeCover
+	case devices.Humidifier:       return devices.TypeHumidifier
+	case devices.Vacuum:           return devices.TypeVacuum
+	case devices.WaterHeater:      return devices.TypeWaterHeater
+	case devices.Thermostat:       return devices.TypeThermostat
+	case devices.TempHumiditySensor: return devices.TypeTempHumidSensor
+	case devices.OccupancySensor:  return devices.TypeOccupancySensor
+	case devices.Speaker:          return devices.TypeSpeaker
+	case devices.Gateway:          return devices.TypeGateway
+	case devices.Plug:             return devices.TypePlug
 	default: return "unknown"
 	}
 }
@@ -257,6 +268,13 @@ func (b *Bridge) Occupancy(did string) (devices.OccupancySensor, error) {
 	if !ok { return nil, fmt.Errorf("bridge: device %s is not an OccupancySensor", did) }
 	return s, nil
 }
+func (b *Bridge) Plug(did string) (devices.Plug, error) {
+	d, ok := b.dv[did]
+	if !ok { return nil, fmt.Errorf("bridge: device %s not found", did) }
+	pg, ok := d.(devices.Plug)
+	if !ok { return nil, fmt.Errorf("bridge: device %s is not a Plug", did) }
+	return pg, nil
+}
 func (b *Bridge) Speaker(did string) (devices.Speaker, error) {
 	d, ok := b.dv[did]
 	if !ok { return nil, fmt.Errorf("bridge: device %s not found", did) }