解析device和task的配置全部用内置方法处理

internal/app/controller/device/device_controller.go

@@ -77,7 +77,7 @@ func newDeviceResponse(device *models.Device) (*DeviceResponse, error) {
 
 	var props map[string]interface{}
 	if len(device.Properties) > 0 && string(device.Properties) != "null" {
-		if err := json.Unmarshal(device.Properties, &props); err != nil {
+		if err := device.ParseProperties(&props); err != nil {
 			return nil, fmt.Errorf("解析设备属性失败 (ID: %d): %w", device.ID, err)
 		}
 	}

internal/app/controller/plan/converter.go

@@ -189,7 +189,7 @@ func TaskToResponse(task *models.Task) (TaskResponse, error) {
 
 	var params map[string]interface{}
 	if len(task.Parameters) > 0 && string(task.Parameters) != "null" {
-		if err := json.Unmarshal(task.Parameters, &params); err != nil {
+		if err := task.ParseParameters(&params); err != nil {
 			return TaskResponse{}, fmt.Errorf("parsing task parameters failed (ID: %d): %w", task.ID, err)
 		}
 	}