feat(activitypub-base): LikeActivity struct + on_like/on_announce_received trait methods

crates/adapters/activitypub-base/src/content.rs

@@ -42,6 +42,16 @@ pub trait ApObjectHandler: Send + Sync {
     /// Actor unfollowed/was removed — clean up all their remote content.
     async fn on_actor_removed(&self, actor_url: &Url) -> anyhow::Result<()>;
 
+    /// Called when a remote actor likes a local thought.
+    /// `object_url` is the AP URL of the liked note (e.g. `{base}/thoughts/{uuid}`).
+    /// `actor_url` is the AP URL of the remote actor who sent the Like.
+    async fn on_like(&self, object_url: &Url, actor_url: &Url) -> anyhow::Result<()>;
+
+    /// Called when a remote actor boosts (Announce) a local thought.
+    /// `object_url` is the AP URL of the announced note.
+    /// `actor_url` is the AP URL of the remote actor who sent the Announce.
+    async fn on_announce_received(&self, object_url: &Url, actor_url: &Url) -> anyhow::Result<()>;
+
     /// Total number of locally-authored posts across all users.
     async fn count_local_posts(&self) -> anyhow::Result<u64>;
 }