~anthropic/claude-sonnet-latest → B (80:20)

Side B fixes a real, deployed bug (hardcoded staging URLs breaking custom hosts/OAuth redirects) by centralizing base-URL logic in a util function and updating deploy CI, touching multiple live modules consistently. Side A merely adds a new, unused reddit.rs client module with no evidence of integration into the actual project (this project appears to be a Clojure/JS app, making the Rust file's relevance and lasting value unclear).