brauliogusmao makes Mike whitelabel-ready

The fork adds a small branding layer that reads the product name, logo, page title, description, and URL from environment variables set at build time. Swap those values, rebuild, and the app shows up as your brand - in the sidebar, the chat header, the workflow list, and the browser tab metadata search engines and link previews pick up.

Notably, brauliogusmao left the original Mike icon in place for spinners and status indicators, where it functions as a UI cue rather than branding. The abstraction is small enough that other forks could lift it directly. The work is independent of the fork's Portuguese-language localisation effort, so adopters get whitelabeling without inheriting locale assumptions.