openai/gpt-chat-latest → B (3:2)

Side B makes a deeper architectural improvement by introducing canonical browse URLs (`/~/...`), centralizing URL generation/parsing in `ItemId::browse_href`/`from_browse_uri`, updating redirects and routing to use those helpers, and adding tests for the new navigation behavior. Side A adds a well-implemented clipboard feature for garden rankings with new UI actions, markdown formatting, permission checks, and tests, but it is primarily a user-facing convenience feature rather than a foundational routing and URL design change.