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/switch.go

@@ -23,16 +23,22 @@ type Switch interface {
 	ToggleChannel(ctx context.Context, ch int) error
 	IsChannelOn(ctx context.Context, ch int) (bool, error)
 
-	OnStateChanged(handler func(ch int, on bool)) (string, error)
-	GetState() []bool
-	FetchState(ctx context.Context) ([]bool, error)
+	OnPropsChanged(handler func(ch int, on bool)) (string, error)
+	GetProps() SwitchProps
+	FetchProps(ctx context.Context) (SwitchProps, error)
+}
+
+// SwitchProps 多键开关完整状态。
+// JSON: {"on":[true,false,true]}，索引 0 = 通道 1
+type SwitchProps struct {
+	On []bool `json:"on"`
 }
 
 // switchDevice is the concrete Switch implementation.
 type switchDevice struct {
 	BaseDevice
 	channels   []siidPiid // "on" property per channel (index 0 = channel 1)
-	stateCache []bool      // MQTT 推送维护的本地缓存，索引 0 = 通道 1
+	propsCache SwitchProps
 }
 
 type siidPiid struct {
@@ -46,7 +52,6 @@ func NewSwitch(client *xiaomi.Client, info *xiaomi.DeviceInfo) (Switch, error) {
 		BaseDevice: NewBaseDevice(client, info),
 	}
 
-	// Use the full SPEC to find all "on" properties (supports multi-channel)
 	miotDev := d.getMIoTDevice()
 	if miotDev == nil || miotDev.SpecInstance() == nil {
 		return nil, xiaomi.ErrNoSPEC
@@ -66,7 +71,7 @@ func NewSwitch(client *xiaomi.Client, info *xiaomi.DeviceInfo) (Switch, error) {
 		return nil, xiaomi.ErrNotSupported
 	}
 	d.channels = channels
-	d.stateCache = make([]bool, len(channels))
+	d.propsCache.On = make([]bool, len(channels))
 
 	return d, nil
 }
@@ -75,18 +80,9 @@ func (d *switchDevice) ChannelCount() int {
 	return len(d.channels)
 }
 
-func (d *switchDevice) TurnOn(ctx context.Context) error {
-	return d.TurnOnChannel(ctx, 1)
-}
-
-func (d *switchDevice) TurnOff(ctx context.Context) error {
-	return d.TurnOffChannel(ctx, 1)
-}
-
-func (d *switchDevice) Toggle(ctx context.Context) error {
-	return d.ToggleChannel(ctx, 1)
-}
-
+func (d *switchDevice) TurnOn(ctx context.Context) error  { return d.TurnOnChannel(ctx, 1) }
+func (d *switchDevice) TurnOff(ctx context.Context) error { return d.TurnOffChannel(ctx, 1) }
+func (d *switchDevice) Toggle(ctx context.Context) error  { return d.ToggleChannel(ctx, 1) }
 func (d *switchDevice) IsOn(ctx context.Context) (bool, error) {
 	return d.IsChannelOn(ctx, 1)
 }
@@ -133,13 +129,12 @@ func (d *switchDevice) IsChannelOn(ctx context.Context, ch int) (bool, error) {
 	return false, nil
 }
 
-func (d *switchDevice) OnStateChanged(handler func(ch int, on bool)) (string, error) {
+func (d *switchDevice) OnPropsChanged(handler func(ch int, on bool)) (string, error) {
 	if len(d.channels) == 0 {
 		return "", xiaomi.ErrNotSupported
 	}
-	// 构建 siid/piid → channel index 的快速查找表
 	type chField struct{ siid, piid int }
-	lookup := make(map[chField]int) // key → channel index (0-based)
+	lookup := make(map[chField]int)
 	for i, c := range d.channels {
 		lookup[chField{c.siid, c.piid}] = i
 	}
@@ -147,8 +142,8 @@ func (d *switchDevice) OnStateChanged(handler func(ch int, on bool)) (string, er
 		for k, idx := range lookup {
 			if k.siid == prop.SIID && k.piid == prop.PIID {
 				if b, ok := prop.Value.(bool); ok {
-					d.stateCache[idx] = b
-					handler(idx+1, b) // ch = idx+1
+					d.propsCache.On[idx] = b
+					handler(idx+1, b)
 				}
 				return
 			}
@@ -157,21 +152,24 @@ func (d *switchDevice) OnStateChanged(handler func(ch int, on bool)) (string, er
 }
 
 func (d *switchDevice) channel(ch int) (siidPiid, bool) {
-	i := ch - 1 // channel 1 → index 0
+	i := ch - 1
 	if i < 0 || i >= len(d.channels) {
 		return siidPiid{}, false
 	}
 	return d.channels[i], true
 }
 
-func (d *switchDevice) GetState() []bool { return d.stateCache }
-func (d *switchDevice) FetchState(ctx context.Context) ([]bool, error) {
+func (d *switchDevice) GetProps() SwitchProps { return d.propsCache }
+
+func (d *switchDevice) FetchProps(ctx context.Context) (SwitchProps, error) {
 	keys := make([]xiaomi.PropKey, len(d.channels))
 	for i, c := range d.channels {
 		keys[i] = xiaomi.PropKey{DID: d.info.DID, SIID: c.siid, PIID: c.piid}
 	}
 	props, err := d.client.GetProps(ctx, keys)
-	if err != nil { return d.stateCache, err }
+	if err != nil {
+		return d.propsCache, err
+	}
 	states := make([]bool, len(d.channels))
 	for i, c := range d.channels {
 		for _, p := range props {
@@ -181,6 +179,6 @@ func (d *switchDevice) FetchState(ctx context.Context) ([]bool, error) {
 			}
 		}
 	}
-	d.stateCache = states
-	return states, nil
+	d.propsCache.On = states
+	return d.propsCache, nil
 }