feat: add post like

lib/social.ts

@@ -77,6 +77,18 @@ export type Post = {
   original_author_name?: string | null;
   original_author_handle?: string | null;
   original_author_avatar_url?: string | null;
+  /** Effective like total = denormalized count + pending (un-flushed)
+   *  delta. Always present on hydrated reads (defaults to 0). */
+  likes_count?: number;
+  /** Whether the calling viewer has liked this post. Always false / absent
+   *  for anonymous viewers. */
+  viewer_has_liked?: boolean;
+};
+
+/** Result of a like / unlike toggle: the new viewer state + effective total. */
+export type LikeResult = {
+  liked: boolean;
+  likes_count: number;
 };
 
 export type Bookmark = {
@@ -198,6 +210,22 @@ export const posts = {
   unreshare(id: string) {
     return call<void>(`/posts/${id}/reshare`, { method: "DELETE" });
   },
+  /** Like a post (idempotent). Returns the new viewer state + effective
+   *  total (DB count + pending Redis delta). Auth-required. */
+  like(id: string) {
+    return call<LikeResult>(`/posts/${id}/like`, { method: "POST" });
+  },
+  /** Unlike a post (idempotent). Same shape as `like`. */
+  unlike(id: string) {
+    return call<LikeResult>(`/posts/${id}/like`, { method: "DELETE" });
+  },
+  /** One page of users who liked the post (newest first), optional
+   *  name/handle search. `total` is the full matching count. Public. */
+  likers(id: string, opts: FollowListParams = {}) {
+    return call<FollowList>(
+      `/posts/${id}/likes?${followListQuery(opts)}`,
+    );
+  },
   /** Report a post. category from PostReportCategory; reason optional.
    *  Auth-required (401 for anonymous callers). Returns nothing (204). */
   report(id: string, category: PostReportCategory, reason: string) {
@@ -417,6 +445,10 @@ export type AppNotification = {
   actor_name?: string | null;
   actor_handle?: string | null;
   actor_avatar_url?: string | null;
+  /** For aggregated `post_like` rows: the liked post + how many likers the
+   *  row represents (renders "X and N-1 others liked your post"). */
+  post_id?: string | null;
+  actor_count?: number;
 };
 
 export const notifications = {