feat: Round 5 - Memory Service, Tool Engine, Call Records, Thinking Logs

- Fix: Session history flash (race condition + WS guard)
- Fix: Chat background overlay + sidebar transparency
- Fix: IoT device control (Chinese action names, status field)
- Feat: Independent memory-service (port 8091, 13 endpoints)
- Feat: Independent tool-engine service (port 8092, 13 tools)
- Feat: Tool call logs with paginated DevTools panel
- Feat: Thinking log records with DevTools panel
- Feat: Future development roadmap document
- Chore: Updated .gitignore, go.work, DevTools config
- Chore: 5-service health check, project review docs

backend/iot-debug-service/cmd/main.go

@@ -227,7 +227,7 @@ func (ds *DeviceStore) Toggle(id string) (*Device, error) {
 	return &cp, nil
 }
 
-// SetProperty 设置设备属性（温度、亮度、位置、模式、颜色等）
+// SetProperty 设置设备属性（状态、温度、亮度、位置、模式、颜色等）
 func (ds *DeviceStore) SetProperty(id, field string, value interface{}) (*Device, error) {
 	ds.mu.Lock()
 	defer ds.mu.Unlock()
@@ -240,6 +240,73 @@ func (ds *DeviceStore) SetProperty(id, field string, value interface{}) (*Device
 	now := time.Now().UTC().Format(time.RFC3339)
 
 	switch field {
+	case "status", "power":
+		// 声明式电源控制：支持 "on"/"off"/"open"/"closed"/"locked"/"unlocked"
+		// 同时支持中文值: "开"/"关"/"打开"/"关闭"
+		// 支持布尔值: true/false → on/off
+		var newStatus string
+		switch v := value.(type) {
+		case string:
+			newStatus = normalizeStatus(v, d.Type)
+			if newStatus == "" {
+				return nil, fmt.Errorf("无效的状态值: %s (设备类型 %s 不支持此状态)", v, d.Type)
+			}
+		case bool:
+			if v {
+				newStatus = "on"
+			} else {
+				newStatus = "off"
+			}
+		case float64:
+			if v == 0 {
+				newStatus = "off"
+			} else {
+				newStatus = "on"
+			}
+		default:
+			return nil, fmt.Errorf("status 需要字符串、布尔值或数字")
+		}
+		// 对于非 on/off 设备类型（curtain/lock），转换为对应状态
+		switch d.Type {
+		case TypeCurtain:
+			if newStatus == "on" {
+				newStatus = "open"
+			} else if newStatus == "off" {
+				newStatus = "closed"
+			}
+		case TypeLock:
+			if newStatus == "on" {
+				newStatus = "unlocked"
+			} else if newStatus == "off" {
+				newStatus = "locked"
+			}
+		}
+
+		if d.Status == newStatus {
+			// 状态未变化，直接返回
+			cp := *d
+			return &cp, nil
+		}
+		oldStatus := d.Status
+		d.Status = newStatus
+		// 根据设备类型设置关联属性
+		switch d.Type {
+		case TypeLight:
+			if newStatus == "off" {
+				d.Brightness = 0
+			} else if d.Brightness == 0 {
+				d.Brightness = 80
+			}
+		case TypeCurtain:
+			if newStatus == "closed" {
+				d.Position = 0
+			} else {
+				d.Position = 100
+			}
+		}
+		d.LastUpdated = now
+		ds.addHistory(id, "status", oldStatus, newStatus)
+
 	case "temperature":
 		v, ok := toFloat64(value)
 		if !ok {
@@ -323,6 +390,36 @@ func (ds *DeviceStore) SetProperty(id, field string, value interface{}) (*Device
 	return &cp, nil
 }
 
+// normalizeStatus 标准化电源状态值
+// 支持英文: "on"/"off"/"open"/"closed"/"locked"/"unlocked"
+// 支持中文: "开"/"关"/"打开"/"关闭"/"开启"/"解锁"/"锁定"/"上锁"
+// 支持布尔兼容: "true"/"false"
+// 返回空字符串表示无效值
+func normalizeStatus(v string, dType DeviceType) string {
+	switch strings.ToLower(strings.TrimSpace(v)) {
+	case "on", "true", "开", "打开", "开启":
+		return "on"
+	case "off", "false", "关", "关闭":
+		return "off"
+	case "open":
+		if dType == TypeCurtain {
+			return "open"
+		}
+		return "on"
+	case "closed":
+		if dType == TypeCurtain {
+			return "closed"
+		}
+		return "off"
+	case "locked", "锁定", "上锁":
+		return "locked"
+	case "unlocked", "解锁":
+		return "unlocked"
+	default:
+		return ""
+	}
+}
+
 // toFloat64 将 interface{} 转换为 float64
 func toFloat64(v interface{}) (float64, bool) {
 	switch val := v.(type) {