fix: remove redundant role gate on respondTo/personaDisplayName in message timeline

The respondToLookup and personaLookup maps only contain bot pubkeys,
so gating on role === "bot" is redundant and breaks rendering when
the relay-side role is stale ("member" instead of "bot").

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

desktop/src/features/messages/lib/formatTimelineMessages.ts

@@ -331,14 +331,8 @@ export function formatTimelineMessages(
         profiles,
       }),
       role,
-      personaDisplayName:
-        role === "bot"
-          ? personaLookup?.get(authorPubkey.toLowerCase())
-          : undefined,
-      respondTo:
-        role === "bot"
-          ? respondToLookup?.get(authorPubkey.toLowerCase())
-          : undefined,
+      personaDisplayName: personaLookup?.get(authorPubkey.toLowerCase()),
+      respondTo: respondToLookup?.get(authorPubkey.toLowerCase()),
       time: formatTime(event.created_at),
       body: edit ? edit.content : event.content,
       parentId: thread.parentId,