Merge pull request #25101 from dvdksn/worktree-sbx-noninteractive-login

docs(sandboxes): document non-interactive sbx login with PAT

Author: dvdksn

content/manuals/ai/sandboxes/usage.md

@@ -35,6 +35,20 @@ $ sbx rm my-sandbox
 $ sbx run claude
 ```
 
+## Non-interactive login
+
+For CI environments and scripts where a browser is not available, use a
+Docker Personal Access Token (PAT) with `--username` and `--password-stdin`:
+
+```console
+$ echo "$DOCKER_PAT" | sbx login --username <your-docker-id> --password-stdin
+```
+
+`--password-stdin` reads the token from standard input to keep it out of
+your shell history. Generate a PAT from your
+[Docker account settings](https://app.docker.com/settings/personal-access-tokens)
+with at least **Read** scope.
+
 ## Interactive mode
 
 Running `sbx` with no subcommands opens an interactive terminal dashboard: