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

thoughts-frontend/app/page.tsx

@@ -5,9 +5,7 @@ import {
   getFriends,
   getMe,
   getTopFriends,
-  getUserProfile,
   Me,
-  User,
 } from "@/lib/api";
 import { PostThoughtForm } from "@/components/post-thought-form";
 import { Button } from "@/components/ui/button";
@@ -62,17 +60,6 @@ async function FeedPage({
   const { items: allThoughts, totalPages } = feedData!;
   const thoughtThreads = buildThoughtThreads(allThoughts);
 
-  const authors = [...new Set(allThoughts.map((t) => t.author.username))];
-  const userProfiles = await Promise.all(
-    authors.map((username) => getUserProfile(username, token).catch(() => null))
-  );
-
-  const authorDetails = new Map<string, { avatarUrl?: string | null }>(
-    userProfiles
-      .filter((u): u is User => !!u)
-      .map((user) => [user.username, { avatarUrl: user.avatarUrl }])
-  );
-
   const friends = (await getFriends(token)).users.map((user) => user.username);
   const topFriendsData = me
     ? await getTopFriends(me.username, token).catch(() => ({ topFriends: [] }))
@@ -111,7 +98,6 @@ async function FeedPage({
               <ThoughtThread
                 key={thought.id}
                 thought={thought}
-                authorDetails={authorDetails}
                 currentUser={me}
               />
             ))}