feat: deliver likes as bookmarks, revert announce cc, add OG images

- Likes are now sent as Create/Note with bookmark-style content (🔖)
  instead of Like activities, ensuring proper display on Mastodon
- Announce activities reverted to upstream addressing (to: Public only,
  no cc:followers)
- Add per-post OG image to both plain JSON-LD and Fedify Note/Article
  objects, derived from the post URL pattern (/og/{date}-{slug}.png)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

lib/jf2-to-as2.js

@@ -14,7 +14,6 @@ import {
   Create,
   Hashtag,
   Image,
-  Like,
   Mention,
   Note,
   Video,
@@ -95,24 +94,7 @@ function linkifyMentions(html, resolvedMentions) {
 export function jf2ToActivityStreams(properties, actorUrl, publicationUrl, options = {}) {
   const postType = properties["post-type"];
 
-  if (postType === "like") {
-    // Serve like posts as Note objects for AP content negotiation.
-    // Returning a bare Like activity breaks Mastodon's authorize_interaction
-    // flow because it expects a content object (Note/Article), not an activity.
-    const likeOf = properties["like-of"];
-    const postUrl = resolvePostUrl(properties.url, publicationUrl);
-    return {
-      "@context": "https://www.w3.org/ns/activitystreams",
-      type: "Note",
-      id: postUrl,
-      attributedTo: actorUrl,
-      published: properties.published,
-      url: postUrl,
-      to: ["https://www.w3.org/ns/activitystreams#Public"],
-      cc: [`${actorUrl.replace(/\/$/, "")}/followers`],
-      content: `\u2764\uFE0F <a href="${likeOf}">${likeOf}</a>`,
-    };
-  }
+  // Likes are delivered as bookmarks — fall through to bookmark handling below
 
   // Reposts are always public — Mastodon and other implementations expect this
   if (postType === "repost") {
@@ -156,8 +138,8 @@ export function jf2ToActivityStreams(properties, actorUrl, publicationUrl, optio
         : [followersUrl],
   };
 
-  if (postType === "bookmark") {
-    const bookmarkUrl = properties["bookmark-of"];
+  if (postType === "bookmark" || postType === "like") {
+    const bookmarkUrl = properties["bookmark-of"] || properties["like-of"];
     const commentary = linkifyUrls(properties.content?.html || properties.content || "");
     object.content = commentary
       ? `${commentary}<br><br>\u{1F516} <a href="${bookmarkUrl}">${bookmarkUrl}</a>`
@@ -178,6 +160,16 @@ export function jf2ToActivityStreams(properties, actorUrl, publicationUrl, optio
     object.content += `<p>\u{1F517} <a href="${postUrl}">${postUrl}</a></p>`;
   }
 
+  // OG image for fediverse preview cards
+  const ogMatch = postUrl && postUrl.match(/\/([\w-]+)\/(\d{4})\/(\d{2})\/(\d{2})\/([\w-]+)\/?$/);
+  if (ogMatch) {
+    object.image = {
+      type: "Image",
+      url: `${publicationUrl.replace(/\/$/, "")}/og/${ogMatch[2]}-${ogMatch[3]}-${ogMatch[4]}-${ogMatch[5]}.png`,
+      mediaType: "image/png",
+    };
+  }
+
   if (isArticle) {
     object.name = properties.name;
     if (properties.summary) {
@@ -253,28 +245,16 @@ export function jf2ToAS2Activity(properties, actorUrl, publicationUrl, options =
   const postType = properties["post-type"];
   const actorUri = new URL(actorUrl);
 
-  if (postType === "like") {
-    const likeOf = properties["like-of"];
-    if (!likeOf) return null;
-    const followersUrl = `${actorUrl.replace(/\/$/, "")}/followers`;
-    return new Like({
-      actor: actorUri,
-      object: new URL(likeOf),
-      to: new URL("https://www.w3.org/ns/activitystreams#Public"),
-      cc: new URL(followersUrl),
-    });
-  }
+  // Likes are delivered as bookmarks — fall through to bookmark handling below
 
-  // Reposts are always public — Mastodon and other implementations expect this
+  // Reposts are always public — upstream @rmdes addressing
   if (postType === "repost") {
     const repostOf = properties["repost-of"];
     if (!repostOf) return null;
-    const followersUrl = `${actorUrl.replace(/\/$/, "")}/followers`;
     return new Announce({
       actor: actorUri,
       object: new URL(repostOf),
       to: new URL("https://www.w3.org/ns/activitystreams#Public"),
-      cc: new URL(followersUrl),
     });
   }
 
@@ -336,8 +316,8 @@ export function jf2ToAS2Activity(properties, actorUrl, publicationUrl, options =
   }
 
   // Content
-  if (postType === "bookmark") {
-    const bookmarkUrl = properties["bookmark-of"];
+  if (postType === "bookmark" || postType === "like") {
+    const bookmarkUrl = properties["bookmark-of"] || properties["like-of"];
     const commentary = linkifyUrls(properties.content?.html || properties.content || "");
     noteOptions.content = commentary
       ? `${commentary}<br><br>\u{1F516} <a href="${bookmarkUrl}">${bookmarkUrl}</a>`
@@ -382,6 +362,15 @@ export function jf2ToAS2Activity(properties, actorUrl, publicationUrl, options =
     noteOptions.attachments = fedifyAttachments;
   }
 
+  // OG image for fediverse preview cards
+  const ogMatchF = postUrl && postUrl.match(/\/([\w-]+)\/(\d{4})\/(\d{2})\/(\d{2})\/([\w-]+)\/?$/);
+  if (ogMatchF) {
+    noteOptions.image = new Image({
+      url: new URL(`${publicationUrl.replace(/\/$/, "")}/og/${ogMatchF[2]}-${ogMatchF[3]}-${ogMatchF[4]}-${ogMatchF[5]}.png`),
+      mediaType: "image/png",
+    });
+  }
+
   // Tags: hashtags + Mention for reply addressing + @mentions
   const fedifyTags = buildFedifyTags(properties, publicationUrl, postType);
 
@@ -575,7 +564,7 @@ function buildPlainTags(properties, publicationUrl, existing) {
 
 function buildFedifyTags(properties, publicationUrl, postType) {
   const tags = [];
-  if (postType === "bookmark") {
+  if (postType === "bookmark" || postType === "like") {
     tags.push(
       new Hashtag({
         name: "#bookmark",