~anthropic/claude-sonnet-latest → B (6:4)

B removes actual dead/redundant defensive code in a core reducer path with a clear rationale and updates the corresponding test to match new correct behavior, a small precise correctness/clarity fix. A is a larger dev-tooling refactor that improves local iteration but also removes room title/breadcrumb UI text seemingly unrelated to the stated purpose, making it more diffuse and less clearly net-positive.