chore: register device types explicitly

device/models/init.go

@@ -2,7 +2,7 @@ package models
 
 import "hands/device"
 
-func init() {
+func RegisterDeviceTypes() {
 	// 注册 L10 设备类型
 	device.RegisterDeviceType("L10", NewL10Hand)
 }

main.go

@@ -93,6 +93,8 @@ func main() {
 		MaxAge:           12 * time.Hour,
 	}))
 
+	models.RegisterDeviceTypes()
+
 	// 设置 API 路由
 	api2.NewServer(device.NewDeviceManager()).SetupRoutes(r)