openai/gpt-chat-latest → B (9:1)

Side B introduces substantial architectural changes: it adds a new RocksDB-backed `durable` workspace crate, moves raw entity payloads out of the in-memory tree into a persistent `EntityStore`, changes reducer/state/reddit flows to use it, and replaces whole-log loading with streamed event replay to reduce startup memory, along with integration tests. Side A is a well-scoped UX improvement that makes pinned icons clickable to unpin via the existing `/ui` flow and adds browser coverage, but its impact is localized compared with B's lasting storage and replay infrastructure.