Keep OpenClaw's gateway probes off the wizard's terminal

OpenClaw's CLI takes a terminal on stdin out of raw mode as it exits, and the onboarding watcher's `openclaw dashboard --json` probes inherited the wizard's terminal. Current releases write the config partway through the wizard, so the probes started while prompts remained, and every two seconds the terminal fell back to line mode: typing at the channel prompt echoed instead of selecting. The probes now read from /dev/null.

bin/omarchy-openclaw-onboard

@@ -26,8 +26,11 @@ settle_seconds=${OMARCHY_OPENCLAW_ONBOARD_SETTLE_SECONDS:-3}
 # setup; the prompts before that take as long as the user takes.
 gateway_timeout=${OMARCHY_OPENCLAW_ONBOARD_GATEWAY_TIMEOUT:-180}
 
+# Probes never get the terminal: OpenClaw's CLI takes a terminal on stdin out
+# of raw mode as it exits, which would leave the wizard's prompts unable to
+# read keys, and the wizard can write its config while prompts remain.
 gateway_answers() {
-  timeout 10 openclaw dashboard --json 2>/dev/null | jq -e '.ok == true' >/dev/null 2>&1
+  timeout 10 openclaw dashboard --json </dev/null 2>/dev/null | jq -e '.ok == true' >/dev/null 2>&1
 }
 
 # A gateway already answering means OpenClaw is set up, and this run must not
@@ -81,7 +84,7 @@ config_applied() {
 gateway_ready() {
   config_applied || return 1
   local json port listener main_pid
-  json=$(timeout 10 openclaw dashboard --json 2>/dev/null) || return 1
+  json=$(timeout 10 openclaw dashboard --json </dev/null 2>/dev/null) || return 1
   jq -e '.ok == true' <<<"$json" >/dev/null 2>&1 || return 1
   port=$(jq -r '.port // empty' <<<"$json" 2>/dev/null)
   [[ -n $port ]] || return 1