Friendly concierge that opens a four-branch menu (Stock / Portfolio / Discovery / Investor profiles) for users who arrive without a specific /parallax-* command in mind. Triggers on greetings addressed to Parallax — 'Hi Parallax', 'Hello Parallax', 'Hey Parallax', 'Good morning Parallax', 'Yo Parallax', 'Parallax!' — case- and punctuation-insensitive. Also triggers on 'what can Parallax do', 'help me get started with Parallax', 'show me Parallax workflows', or any open-ended request to explore the Parallax toolkit. NOT for running a specific workflow the user already named (use that /parallax-* directly), not for methodology-only explanations (use /parallax-score-explaine…
