openai/gpt-chat-latest → A (3:1)

Side A fixes a functional deployment and OAuth/redirect problem by centralizing base URL generation in `app.util/get-base-url`, replacing multiple hardcoded host/environment checks across login, OAuth, Linear, Spotify, Twitter, and YouTube, using `HOSTNAME`/current origin for custom hosts, and updating the Fly deployment workflow to deploy from `staging`. Side B is primarily a CLI/API reshape and documentation update (`ingest` → `forum post`, `forum list/show` subcommands, help text, tests), which improves interface consistency but mostly reorganizes existing behavior rather than fixing a cross-cutting runtime issue.