fix: collectino post background

internal/service/social_service.go

@@ -320,6 +320,23 @@ func (s *CollectionService) Get(ctx context.Context, id, viewerID string) (*mode
 	if err != nil {
 		return nil, nil, err
 	}
+	// PostsIn returns posts without images (single-table boundary). Hydrate
+	// them in one batched query so callers — and the post cards rendered
+	// inside collection carousels — can show the post's first image as
+	// background instead of falling back to the empty quote panel.
+	if len(posts) > 0 {
+		ids := make([]string, len(posts))
+		for i := range posts {
+			ids[i] = posts[i].ID
+		}
+		imgs, err := s.posts.ImagesFor(ctx, ids)
+		if err != nil {
+			return nil, nil, err
+		}
+		for i := range posts {
+			posts[i].Images = imgs[posts[i].ID]
+		}
+	}
 	return c, posts, nil
 }