The very basic client app, not adapted for mobiles.

client/internal/services/core/options/widgets.go

@@ -0,0 +1,28 @@
+package options
+
+import (
+	"errors"
+	"fmt"
+
+	"bunker/client/internal/services/core"
+	"bunker/client/internal/services/core/options/dto"
+	"bunker/client/internal/services/core/options/models"
+)
+
+var errWidgetPaneAlreadyRegistered = errors.New("widget pane already registered")
+
+func (o *options) RegisterOptionsWidget(widgetData *dto.OptionPane) error {
+	if _, found := o.widgets[widgetData.Name]; found {
+		return fmt.Errorf(
+			"%w: RegisterOptionsWidget: '%s': %w",
+			core.ErrOptions,
+			widgetData.Name,
+			errWidgetPaneAlreadyRegistered,
+		)
+	}
+
+	o.widgets[widgetData.Name] = models.OptionPaneFromDTO(widgetData)
+	o.widgetsItems = append(o.widgetsItems, widgetData.Name)
+
+	return nil
+}