fix(cli): only show updating spinner when auto-update is in progress (#23709)

packages/cli/src/ui/components/AppHeader.tsx

@@ -108,7 +108,7 @@ export const AppHeader = ({ version, showDetails = true }: AppHeaderProps) => {
           Gemini CLI
         </Text>
         <Text color={theme.text.secondary}> v{version}</Text>
-        {updateInfo && (
+        {updateInfo?.isUpdating && (
           <Box marginLeft={2}>
             <Text color={theme.text.secondary}>
               <CliSpinner /> Updating

packages/cli/src/ui/utils/updateCheck.ts

@@ -27,6 +27,7 @@ export interface UpdateInfo {
 export interface UpdateObject {
   message: string;
   update: UpdateInfo;
+  isUpdating?: boolean;
 }
 
 /**