v0.23.1

Added

• Connectors show the site's mark. The MCP server names the brand icons
  in its implementation info, and a private deployment serves them before
  sign-in, so Claude, ChatGPT and other clients show the mark beside the
  connector. The build renders the favicon as /icon-192.png and
  /favicon.ico unless public/ holds its own; those, the favicon and its
  dark variant are the only paths an anonymous request is answered with
  (ADR-052).

Upgrade note

Bump the packages and the workflow pins, and deploy. A connector added
before the upgrade may keep showing no icon until it is added again, since
assistants cache what they fetched.