Feature request: --name flag for claude --bg (background session naming)

Use case

When dispatching background sessions via scripts (e.g., dispatch-ticket.sh in automation workflows), there's no way to set a descriptive session name at launch time. Sessions get auto-generated names, requiring manual rename via Ctrl+R.

Current workaround

Manual rename: Ctrl+R → search for session → rename. This breaks automation flows.

Proposed API

Add a --name flag to claude --bg:

claude --bg --name "TICKET-884: feature request name flag"

This would allow scripts to set meaningful, discoverable session names at dispatch time.

Alternative: session file pattern

If a full CLI flag is too heavy, consider accepting a session name via stdin or env var when --bg is used.