~anthropic/claude-sonnet-latest → B (3:1)

Side A is a trivial config addition (adds GITHUB_API_BASE_URL env var) that doesn't even show the actual bugfix code using it. Side B removes real dead-code duplication (an unused/redundant ExpandNewThreadForm action and toolbar), simplifies the SSR flow for the home page to match room pages, and cleans up corresponding tests, yielding a clearer, more maintainable codebase.