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

Side A is a focused, well-documented fix that removes duplicate UI logic (ExpandNewThreadForm) and unifies the home page's compose slot with the room page pattern, including removal of the now-obsolete test — a clear, verifiable improvement in code clarity and correctness. Side B's diff deletes the old URL engine and tests but references new modules (graph.rs, parse.rs, registry_tests.rs) that are not shown in the patch, making the actual substance of the replacement unverifiable and the vague commit message ('url stuff') further undermines confidence in its completeness and intent.