fix: guard interactive prompts on both stdin and stdout TTY

src/cli/tui-install-prompts.ts

@@ -12,7 +12,7 @@ async function selectOrCancel<TValue extends Readonly<string | boolean | number>
   options: Option<TValue>[]
   initialValue: TValue
 }): Promise<TValue | null> {
-  if (!process.stdin.isTTY) return null
+  if (!process.stdin.isTTY || !process.stdout.isTTY) return null
 
   const value = await p.select<TValue>({
     message: params.message,