refactor: standardise S3 URL generation (#362)

* refactor: replace presigned URL uploads with backend upload endpoints

* feat: update avatar upload to use new endpoint

* refactor: use createS3Client in auth hooks

* feat: generate presigned URLs for avatars

* fix: show avatar image in user menu

* fix: hide tooltip if content is empty

* fix: support external avatar URLs in generateAvatarUrl

* fix: remove content type restriction on attachments

apps/web/src/views/members/index.tsx

@@ -126,7 +126,6 @@ export default function MembersPage() {
                   name={memberName ?? ""}
                   email={memberEmail ?? ""}
                   imageUrl={memberImage ? getAvatarUrl(memberImage) : undefined}
-                  icon={showPendingIcon ? "?" : undefined}
                 />
               )}
             </div>