diff --git a/docs/core-checklist-status.md b/docs/core-checklist-status.md
index 5559757..8923d54 100644
--- a/docs/core-checklist-status.md
+++ b/docs/core-checklist-status.md
@@ -29,7 +29,7 @@ Legend:
 20. GIF - `PARTIAL` (web GIF picker with Tenor search + preset fallback + favorites)
 21. Message History/Search - `DONE` (history/pagination/chat+global search)
 22. Text Formatting - `PARTIAL` (bold/italic/underline/spoiler/mono/links + strikethrough + quote/code block; toolbar still evolving)
-23. Groups - `PARTIAL` (create/add/remove/invite link; join-by-invite and invite permissions covered by integration tests; members API now returns profile fields (`username/name/avatar_url`) for richer moderation UI; advanced moderation still partial)
+23. Groups - `PARTIAL` (create/add/remove/invite link; join-by-invite and invite permissions covered by integration tests; members API now returns profile fields (`username/name/avatar_url`) and web Chat Info consumes them to avoid extra per-member profile requests; advanced moderation still partial)
 24. Roles - `DONE` (owner/admin/member)
 25. Admin Rights - `PARTIAL` (delete/pin/edit info + explicit ban APIs for groups/channels including ban list endpoint; web Chat Info now shows searchable `Banned users` with right-click `Unban` action for owner/admin, plus member search and invite-link copy/regenerate actions; integration tests cover channel member read-only, channel admin full-delete, channel message delete-for-all permissions, group profile edit permissions, owner-only role management rules, and admin-visible/member-forbidden ban-list access; remaining UX moderation tools limited)
 26. Channels - `PARTIAL` (create/post/edit/delete/subscribe/unsubscribe; integration tests now also cover invite-link permissions (member forbidden, admin allowed); UX edge-cases still polishing)
diff --git a/web/src/chat/types.ts b/web/src/chat/types.ts
index 1b92275..eaae039 100644
--- a/web/src/chat/types.ts
+++ b/web/src/chat/types.ts
@@ -46,6 +46,9 @@ export interface ChatMember {
   user_id: number;
   role: ChatMemberRole;
   joined_at: string;
+  username?: string | null;
+  name?: string | null;
+  avatar_url?: string | null;
 }
 
 export interface ChatBan {
diff --git a/web/src/components/ChatInfoPanel.tsx b/web/src/components/ChatInfoPanel.tsx
index fd8e57d..4c47d6e 100644
--- a/web/src/components/ChatInfoPanel.tsx
+++ b/web/src/components/ChatInfoPanel.tsx
@@ -134,11 +134,31 @@ export function ChatInfoPanel({ chatId, open, onClose }: Props) {
   async function refreshMembers(targetChatId: number): Promise<ChatMember[]> {
     const nextMembers = await listChatMembers(targetChatId);
     setMembers(nextMembers);
-    const ids = [...new Set(nextMembers.map((m) => m.user_id))];
-    const profiles = await Promise.all(ids.map((id) => getUserById(id)));
     const byId: Record<number, AuthUser> = {};
-    for (const profile of profiles) {
-      byId[profile.id] = profile;
+    const missingIds: number[] = [];
+    for (const member of nextMembers) {
+      if (member.name || member.username || member.avatar_url) {
+        byId[member.user_id] = {
+          id: member.user_id,
+          email: "",
+          name: member.name || member.username || `user #${member.user_id}`,
+          username: member.username || `user${member.user_id}`,
+          bio: null,
+          avatar_url: member.avatar_url || null,
+          email_verified: false,
+          allow_private_messages: true,
+          created_at: "",
+          updated_at: "",
+        };
+      } else {
+        missingIds.push(member.user_id);
+      }
+    }
+    if (missingIds.length) {
+      const profiles = await Promise.all(missingIds.map((id) => getUserById(id)));
+      for (const profile of profiles) {
+        byId[profile.id] = profile;
+      }
     }
     setMemberUsers(byId);
     return nextMembers;