推进活动系统最小成品闭环与游客体验

backend/internal/service/event_play_service.go

@@ -35,6 +35,7 @@ type EventPlayResult struct {
 	} `json:"release,omitempty"`
 	ResolvedRelease      *ResolvedReleaseView      `json:"resolvedRelease,omitempty"`
 	Runtime              *RuntimeSummaryView       `json:"runtime,omitempty"`
+	Preview              *MapPreviewView           `json:"preview,omitempty"`
 	CurrentPresentation  *PresentationSummaryView  `json:"currentPresentation,omitempty"`
 	CurrentContentBundle *ContentBundleSummaryView `json:"currentContentBundle,omitempty"`
 	Play                 struct {
@@ -104,6 +105,11 @@ func (s *EventPlayService) GetEventPlay(ctx context.Context, input EventPlayInpu
 	}
 	result.ResolvedRelease = buildResolvedReleaseFromEvent(event, LaunchSourceEventCurrentRelease)
 	result.Runtime = buildRuntimeSummaryFromEvent(event)
+	if preview, err := buildPreviewFromPayload(event.ReleasePayloadJSON); err != nil {
+		return nil, err
+	} else {
+		result.Preview = preview
+	}
 	result.CurrentPresentation = buildPresentationSummaryFromEvent(event)
 	if enrichedPresentation, err := loadPresentationSummaryByPublicID(ctx, s.store, event.PresentationID); err != nil {
 		return nil, err