perf(frontend): eliminate author profile waterfall — use thought.author directly

thoughts-frontend/app/search/page.tsx

@@ -1,6 +1,6 @@
 import type { Metadata } from "next";
 import { cookies } from "next/headers";
-import { getMe, search, lookupRemoteActor, User } from "@/lib/api";
+import { getMe, search, lookupRemoteActor } from "@/lib/api";
 
 export async function generateMetadata({
   searchParams,
@@ -51,13 +51,6 @@ export default async function SearchPage({ searchParams }: SearchPageProps) {
     token ? getMe(token).catch(() => null) : null,
   ]);
 
-  const authorDetails = new Map<string, { avatarUrl?: string | null }>();
-  if (results) {
-    results.users.forEach((user: User) => {
-      authorDetails.set(user.username, { avatarUrl: user.avatarUrl });
-    });
-  }
-
   return (
     <div className="container mx-auto max-w-2xl p-4 sm:p-6">
       <header className="my-6">
@@ -91,7 +84,6 @@ export default async function SearchPage({ searchParams }: SearchPageProps) {
             <TabsContent value="thoughts">
               <ThoughtList
                 thoughts={results.thoughts}
-                authorDetails={authorDetails}
                 currentUser={me}
               />
             </TabsContent>