feat: show source-qualified author names

lib/display.ts

@@ -0,0 +1,16 @@
+export type AuthorDisplay = {
+  origin: string;
+  username: string;
+  name: string | null;
+  remote_display_name?: string | null;
+  source_base_url: string | null;
+};
+
+export function postAuthorLabel(post: AuthorDisplay) {
+  const linkedMemos = post.origin === "memos" || post.origin === "hub";
+  const author = linkedMemos ? (post.remote_display_name || post.name || post.username) : (post.name || post.username);
+  if (linkedMemos && post.source_base_url) {
+    try { return `@${author}@${new URL(post.source_base_url).hostname}`; } catch { /* Keep a readable fallback for legacy malformed URLs. */ }
+  }
+  return `@${author}${post.name ? ` · ${post.name}` : ""}`;
+}