{# Single source of truth for the "Setup a new Claude Code" clipboard payload. Two modes: * preview_mode=True → emits a read-only HTML
 block rendered
                           with the real server_url and a visible placeholder
                           for the token. Used inline on /dashboard and
                           /install so the reader can see exactly what will
                           land in their clipboard.
   * preview_mode=False →  emits the JS `SETUP_INSTRUCTIONS_TEMPLATE` array +
                           `renderSetupInstructions(server, token)` function.
                           Placed inside a