Exercise selector validation in a fresh OPNsense VM

tests/ui/run-opnsense.sh

@@ -36,6 +36,7 @@ cleanup()
 }
 trap cleanup EXIT INT TERM
 
+rm -f "$runtime_dir/ready" "$runtime_dir/launcher.log"
 "$script_dir/start-opnsense.sh" > "$runtime_dir/launcher.log" 2>&1 &
 launcher_pid=$!
 
@@ -70,6 +71,7 @@ while ! curl --fail --insecure --silent --connect-timeout 2 "$OPNSENSE_UI_BASE_U
     }
     sleep 1
 done
+sleep 10
 
 pnpm --dir "$script_dir" install --frozen-lockfile
 pnpm --dir "$script_dir" test