fix(install): use direct process redirection to /dev/tty for setup child process

Co-authored-by: Junie <junie@jetbrains.com>

install.sh

@@ -130,11 +130,12 @@ main() {
     fi
     setup_cmd+=(./setup.sh "$@")
 
-    # Reconnect stdin to /dev/tty if stdin is currently piped and /dev/tty is accessible (for interactive prompts/TUI)
+    # Execute setup.sh with stdin connected to /dev/tty if stdin is piped (e.g. curl ... | bash)
     if [[ ! -t 0 ]] && [[ -e /dev/tty ]] && ( : < /dev/tty ) 2>/dev/null; then
-        exec < /dev/tty
-    fi
+        "${setup_cmd[@]}" < /dev/tty
+    else
         "${setup_cmd[@]}"
+    fi
 }
 
 main "$@"