fix: api rate limit

internal/service/social_service.go

@@ -444,6 +444,33 @@ func (s *PostService) ListMine(ctx context.Context, userID string, limit, offset
 	return posts, total, nil
 }
 
+// ListMineKeyset is the owner's scroll feed via keyset pagination (posts older
+// than the cursor, newest-first). Same hydration as ListMine; no total.
+func (s *PostService) ListMineKeyset(ctx context.Context, userID string, beforeAt time.Time, beforeID string, limit int) ([]model.Post, error) {
+	if limit <= 0 || limit > 50 {
+		limit = 20
+	}
+	posts, err := s.posts.ListByUserKeyset(ctx, userID, beforeAt, beforeID, limit)
+	if err != nil {
+		return nil, err
+	}
+	for i := range posts {
+		if posts[i].ResharedFromPostID != nil {
+			posts[i].ViewerHasReshared = true
+		}
+	}
+	if err := s.hydrateLikesSlice(ctx, userID, posts); err != nil {
+		return nil, err
+	}
+	if err := s.hydrateMentionsSlice(ctx, posts); err != nil {
+		return nil, err
+	}
+	if err := s.hydratePinnedSlice(ctx, userID, posts); err != nil {
+		return nil, err
+	}
+	return posts, nil
+}
+
 // ListHidden is the owner's "Hidden" tab — their hidden posts only, hydrated
 // like ListMine so the cards render fully and the menu offers Unhide.
 func (s *PostService) ListHidden(ctx context.Context, userID string, limit, offset int) ([]model.Post, int, error) {