fix(docker-nuke): give accurate recovery advice when the daemon does not return

The failure path advised --deep and a disk-space check regardless of cause.
On the first live run that was wrong on both counts: 101 GiB were free and
--deep was irrelevant. Docker Desktop had crashed on startup, and the actual
fix was launching it from the Dock.

Branch the advice on whether any Docker process survived the relaunch. No
survivors means the app did not stay up, which no programmatic relaunch can
work around; survivors mean it is up but not answering yet.

.local/bin/docker-nuke

@@ -785,15 +785,32 @@ main() {
 
   local verdict="daemon did not return within ${RESTART_TIMEOUT}s${dump_note}${kill_note}"
   elapsed=$(( $(date +%s) - started ))
-  local still_running
-  still_running="docker-nuke: still running: $(docker_pids | tr '\n' ' ')"
-  local deep_hint
+
+  # The advice depends on WHY the daemon is absent, and the tell is whether any
+  # Docker process survived the relaunch. No survivors means Docker Desktop was
+  # started but did not stay up -- an app crashing on startup, which no
+  # programmatic relaunch can work around. Survivors mean it is up but the
+  # daemon is not answering yet: still starting, or wedged.
+  local survivors dump_hint
+  survivors="$(docker_pids | tr '\n' ' ')"
   if [ -n "${DUMP_DIR:-}" ]; then
-    deep_hint="docker-nuke: try 'docker-nuke --deep', or check disk space in $DUMP_DIR/disk.txt"
+    dump_hint="docker-nuke: see $DUMP_DIR/summary.txt for triage, and disk.txt for free space"
   else
-    deep_hint="docker-nuke: try 'docker-nuke --deep'; no dump was captured this run to check disk space in"
+    dump_hint="docker-nuke: no dump was captured this run"
+  fi
+
+  if [ -z "$survivors" ]; then
+    finish "$verdict" 1 "$elapsed" \
+      "docker-nuke: no Docker processes are running -- Docker Desktop was relaunched but did not stay up" \
+      "docker-nuke: launch Docker Desktop from the Dock or Spotlight; a programmatic relaunch cannot recover an app that crashes on startup" \
+      "docker-nuke: if it keeps crashing, check Console.app for com.docker.backend, then update or reinstall Docker Desktop" \
+      "$dump_hint"
+  else
+    finish "$verdict" 1 "$elapsed" \
+      "docker-nuke: still running: $survivors" \
+      "docker-nuke: Docker is up but the daemon is not answering -- it may still be starting; retry, or use 'docker-nuke --deep' to also stop root helpers" \
+      "$dump_hint"
   fi
-  finish "$verdict" 1 "$elapsed" "$still_running" "$deep_hint"
   return 1
 }