openai/gpt-chat-latest → B (4:1)

Side B fixes a substantive correctness issue around canonical ontology root paths by introducing normalized storage for `~/`, updating lookups to use normalized keys, centralizing tilde-path conversion, and adding extensive regression tests covering root handling, rankings, and routing. Side A mainly refactors the fetch flow into an SSE-based implementation and reorganizes HTML helpers while adding logging and async plumbing, which is valuable but is largely an architectural/UI change rather than a fundamental correctness fix.