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/speaker.go

@@ -49,13 +49,13 @@ type Speaker interface {
 	ExecuteTextDirective(ctx context.Context, text string, silent bool) error
 	PlayMusic(ctx context.Context) error
 
-	OnStateChanged(handler func(state SpeakerState, changed string)) (string, error)
-	GetState() SpeakerState
-	FetchState(ctx context.Context) (SpeakerState, error)
+	OnPropsChanged(handler func(props SpeakerProps, changed string)) (string, error)
+	GetProps() SpeakerProps
+	FetchProps(ctx context.Context) (SpeakerProps, error)
 }
 
-// SpeakerState 音箱完整状态（字段名对齐 SPEC type）
-type SpeakerState struct {
+// SpeakerProps 音箱完整状态（字段名对齐 SPEC type）
+type SpeakerProps struct {
 	On        bool   `json:"on"`        // SPEC: "on"
 	Volume    int    `json:"volume"`    // SPEC: "volume"
 	Mute      bool   `json:"mute"`      // SPEC: "mute"
@@ -86,7 +86,7 @@ type speakerDevice struct {
 	actExecuteTextDirective isAction
 	actPlayMusic           isAction
 
-	stateCache SpeakerState
+	propsCache SpeakerProps
 }
 
 // NewSpeaker creates a Speaker control for the given device.
@@ -183,7 +183,7 @@ func (d *speakerDevice) TurnOff(ctx context.Context) error {
 }
 
 func (d *speakerDevice) Toggle(ctx context.Context) error {
-	s := d.GetState()
+	s := d.GetProps()
 	if s.On {
 		return d.TurnOff(ctx)
 	}
@@ -339,24 +339,24 @@ func (d *speakerDevice) PlayMusic(ctx context.Context) error {
 
 // ── 订阅 / 状态 ──
 
-func (d *speakerDevice) OnStateChanged(handler func(state SpeakerState, changed string)) (string, error) {
+func (d *speakerDevice) OnPropsChanged(handler func(props SpeakerProps, changed string)) (string, error) {
 	type field struct {
 		siid, piid int
 		name       string
-		fill       func(*SpeakerState, interface{})
+		fill       func(*SpeakerProps, interface{})
 	}
 	var fields []field
-	add := func(sp siidPiid, name string, fill func(*SpeakerState, interface{})) {
+	add := func(sp siidPiid, name string, fill func(*SpeakerProps, interface{})) {
 		if sp.valid {
 			fields = append(fields, field{sp.siid, sp.piid, name, fill})
 		}
 	}
-	add(d.propOn, "on", func(s *SpeakerState, v interface{}) { s.On, _ = v.(bool) })
-	add(d.propVolume, "volume", func(s *SpeakerState, v interface{}) { s.Volume = toInt(v) })
-	add(d.propMute, "mute", func(s *SpeakerState, v interface{}) { s.Mute, _ = v.(bool) })
-	add(d.propPlayState, "play-state", func(s *SpeakerState, v interface{}) { s.PlayState = toInt(v) })
-	add(d.propSleepMode, "sleep-mode", func(s *SpeakerState, v interface{}) { s.SleepMode, _ = v.(bool) })
-	add(d.propAudioID, "audio-id", func(s *SpeakerState, v interface{}) {
+	add(d.propOn, "on", func(s *SpeakerProps, v interface{}) { s.On, _ = v.(bool) })
+	add(d.propVolume, "volume", func(s *SpeakerProps, v interface{}) { s.Volume = toInt(v) })
+	add(d.propMute, "mute", func(s *SpeakerProps, v interface{}) { s.Mute, _ = v.(bool) })
+	add(d.propPlayState, "play-state", func(s *SpeakerProps, v interface{}) { s.PlayState = toInt(v) })
+	add(d.propSleepMode, "sleep-mode", func(s *SpeakerProps, v interface{}) { s.SleepMode, _ = v.(bool) })
+	add(d.propAudioID, "audio-id", func(s *SpeakerProps, v interface{}) {
 		if str, ok := v.(string); ok {
 			s.AudioID = str
 		}
@@ -368,17 +368,17 @@ func (d *speakerDevice) OnStateChanged(handler func(state SpeakerState, changed
 	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 *speakerDevice) GetState() SpeakerState { return d.stateCache }
+func (d *speakerDevice) GetProps() SpeakerProps { return d.propsCache }
 
-func (d *speakerDevice) FetchState(ctx context.Context) (SpeakerState, error) {
+func (d *speakerDevice) FetchProps(ctx context.Context) (SpeakerProps, error) {
 	keys := []xiaomi.PropKey{}
 	add := func(sp siidPiid) {
 		if sp.valid {
@@ -394,29 +394,29 @@ func (d *speakerDevice) FetchState(ctx context.Context) (SpeakerState, error) {
 
 	props, err := d.client.GetProps(ctx, keys)
 	if err != nil {
-		return d.stateCache, err
+		return d.propsCache, err
 	}
-	state := SpeakerState{}
+	result := SpeakerProps{}
 	for _, p := range props {
 		switch {
 		case match(d.propOn, p):
-			state.On, _ = p.Value.(bool)
+			result.On, _ = p.Value.(bool)
 		case match(d.propVolume, p):
-			state.Volume = toInt(p.Value)
+			result.Volume = toInt(p.Value)
 		case match(d.propMute, p):
-			state.Mute, _ = p.Value.(bool)
+			result.Mute, _ = p.Value.(bool)
 		case match(d.propPlayState, p):
-			state.PlayState = toInt(p.Value)
+			result.PlayState = toInt(p.Value)
 		case match(d.propSleepMode, p):
-			state.SleepMode, _ = p.Value.(bool)
+			result.SleepMode, _ = p.Value.(bool)
 		case match(d.propAudioID, p):
 			if s, ok := p.Value.(string); ok {
-				state.AudioID = s
+				result.AudioID = s
 			}
 		}
 	}
-	d.stateCache = state
-	return state, nil
+	d.propsCache = result
+	return result, nil
 }
 
 func match(sp siidPiid, p *xiaomi.PropertyValue) bool {