feat: AC 三合一设备支持 + 新增 Plug/Gateway 驱动 + Cover 结构化重构

**AC 驱动增强**
- 支持 thermostat + air-conditioner + air-fresh 多服务三合一设备，属性跨服务合并解析
- 新增 specResolver.findValListInService/findInService/hasService/serviceShortName 方法
- 移除 KindThermostat，heater/electric-blanket/thermostat 重新归类为 KindAirConditioner

**Cover 窗帘重构**
- CoverProps 结构化：Position/Status/Fault 分离
- SetPosition 优先写 target-position，回退 current-position
- OnPropsChanged/FetchProps 支持多属性同步刷新

**新增设备类型**
- Plug 驱动：插座/插头，支持开合、在线状态、属性变更订阅
- Gateway 驱动：网关设备类型识别
- miot/miot_errors.go：新增 MIoT 云端错误码定义

**MIoT 客户端健壮性**
- SetProp 空结果视为失败；设备被移除或离线时自动刷新设备列表
- GetDevices 的 has_more 改用 parseBool 严格解析
- MIPS SubscribeMany 批量订阅减少往返
- matchURN 改为按段精确匹配，避免 tofan 误匹配 fan

**Bridge**
- 移除 Thermostat case，Cover 改用结构化 CoverProps
- 新增设备创建后自动订阅属性变更

**其他**
- 日志整体 Info → Debug 降噪
- .gitignore 忽略 /.codebuddy/memory
- 更新 devices_test 与 08_adv_filter_classify 示例

xiaomi/devices/plug.go

@@ -0,0 +1,102 @@
+package devices
+
+import (
+	"context"
+	"fmt"
+
+	"xiaomihome/xiaomi"
+)
+
+// Plug 插座/插头统一控制接口（电脑开机卡、智能插座等）。
+type Plug interface {
+	Device
+	TurnOn(ctx context.Context) error
+	TurnOff(ctx context.Context) error
+	IsOn(ctx context.Context) (bool, error)
+
+	OnPropsChanged(handler func(on bool)) (string, error)
+	GetProps() PlugProps
+	FetchProps(ctx context.Context) (PlugProps, error)
+}
+
+// PlugProps 插座完整状态。
+type PlugProps struct {
+	On bool `json:"on"`
+}
+
+type plugDevice struct {
+	BaseDevice
+	propOn     siidPiid
+	propsCache PlugProps
+}
+
+// NewPlug creates a Plug control for the given device.
+func NewPlug(client *xiaomi.Client, info *xiaomi.DeviceInfo) (Plug, error) {
+	if info == nil {
+		return nil, xiaomi.ErrDeviceNotFound
+	}
+	miotDev := client.GetMIoTDevice(info.DID)
+	if miotDev == nil || miotDev.SpecInstance() == nil {
+		return nil, fmt.Errorf("%w: device has no SPEC", xiaomi.ErrNotSupported)
+	}
+
+	d := &plugDevice{
+		BaseDevice: NewBaseDevice(client, info),
+	}
+
+	for _, svc := range miotDev.SpecInstance().Services {
+		for _, prop := range svc.Properties {
+			if propertyShortName(prop.Type) == "on" && !d.propOn.valid {
+				d.propOn = siidPiid{prop.SIID, prop.PIID, true}
+			}
+		}
+	}
+	if !d.propOn.valid {
+		return nil, fmt.Errorf("%w: no on property", xiaomi.ErrNotSupported)
+	}
+
+	return d, nil
+}
+
+func (d *plugDevice) TurnOn(ctx context.Context) error {
+	return d.SetProp(ctx, d.propOn.siid, d.propOn.piid, true)
+}
+
+func (d *plugDevice) TurnOff(ctx context.Context) error {
+	return d.SetProp(ctx, d.propOn.siid, d.propOn.piid, false)
+}
+
+func (d *plugDevice) IsOn(ctx context.Context) (bool, error) {
+	prop, err := d.GetProp(ctx, d.propOn.siid, d.propOn.piid)
+	if err != nil {
+		return false, err
+	}
+	b, _ := prop.Value.(bool)
+	return b, nil
+}
+
+func (d *plugDevice) OnPropsChanged(handler func(on bool)) (string, error) {
+	return d.SubProp(d.propOn.siid, d.propOn.piid, func(did string, prop *xiaomi.PropertyValue) {
+		if b, ok := prop.Value.(bool); ok {
+			d.propsCache.On = b
+			handler(b)
+		}
+	})
+}
+
+func (d *plugDevice) GetProps() PlugProps { return d.propsCache }
+
+func (d *plugDevice) FetchProps(ctx context.Context) (PlugProps, error) {
+	props, err := d.client.GetProps(ctx, []xiaomi.PropKey{
+		{DID: d.info.DID, SIID: d.propOn.siid, PIID: d.propOn.piid},
+	})
+	if err != nil {
+		return d.propsCache, err
+	}
+	for _, p := range props {
+		if p.SIID == d.propOn.siid && p.PIID == d.propOn.piid {
+			d.propsCache.On, _ = p.Value.(bool)
+		}
+	}
+	return d.propsCache, nil
+}