fix(cli): unskip first slash command output (#8482)

Author: uinstinct

extensions/cli/src/ui/components/MemoizedMessage.tsx

@@ -56,13 +56,6 @@ export const MemoizedMessage = memo<MemoizedMessageProps>(
 
     // Handle system messages
     if (isSystem) {
-      // TODO: Properly separate LLM system messages from UI informational messages
-      // using discriminated union types. For now, skip displaying the first system
-      // message which is typically the LLM's system prompt.
-      if (index === 0) {
-        return null;
-      }
-
       return (
         <Box key={index} marginBottom={1}>
           <Text color="dim" italic>