fix: user post feed view

lib/social.ts

@@ -206,6 +206,22 @@ export type Feedback = {
 
 // ─── Posts ───────────────────────────────────────────────────────────────
 
+/** Keyset cursor for the scroll feed — the last seen post's sort key. */
+export type FeedCursor = { created_at: string; id: string };
+
+/** Paging options for a scroll feed: a keyset `before` cursor (preferred) or
+ *  a plain `limit` for the first/grid page. */
+export type FeedPageParams = { limit?: number; before?: FeedCursor };
+
+function feedPageQuery({ limit = 20, before }: FeedPageParams): string {
+  const qs = new URLSearchParams({ limit: String(limit) });
+  if (before) {
+    qs.set("before", before.created_at);
+    qs.set("before_id", before.id);
+  }
+  return `?${qs}`;
+}
+
 export const posts = {
   create(input: {
     caption: string;
@@ -271,8 +287,10 @@ export const posts = {
       body: JSON.stringify({ image_urls }),
     });
   },
-  mine() {
-    return call<Post[]>("/posts/mine");
+  /** The caller's own posts (scroll feed). With `before` it keyset-pages
+   *  posts older than that cursor; without it, the newest page. */
+  mine(opts: FeedPageParams = {}) {
+    return call<Post[]>(`/posts/mine${feedPageQuery(opts)}`);
   },
   /** The caller's hidden posts (owner-only) — drives the /u/me Hidden tab. */
   hidden() {
@@ -549,12 +567,13 @@ export const profile = {
   get(handle: string) {
     return call<PublicProfile>(`/u/${encodeURIComponent(handle)}`);
   },
-  feed(handle: string, limit = 20, offset = 0) {
-    const qs = new URLSearchParams({
-      limit: String(limit),
-      offset: String(offset),
-    });
-    return call<Post[]>(`/u/${encodeURIComponent(handle)}/feed?${qs}`);
+  /** A user's public scroll feed. With `before` it keyset-pages posts older
+   *  than that cursor (infinite scroll); otherwise the newest page. The grid
+   *  still passes plain `limit`. */
+  feed(handle: string, opts: FeedPageParams = {}) {
+    return call<Post[]>(
+      `/u/${encodeURIComponent(handle)}/feed${feedPageQuery(opts)}`,
+    );
   },
   /** Posts that tag this user (the Mentions tab), newest first. */
   mentionsFeed(handle: string, limit = 30, offset = 0) {