openai/gpt-chat-latest → B (3:2)

Side B introduces a substantive architectural change by moving entity fetching to an SSE-based workflow, adding asynchronous completion notifications with oneshot channels, integrating streaming UI updates, and wiring the backend, frontend, and tests together for a more responsive fetch pipeline. Side A adds valuable Reddit-specific rendering (thumbnails, full images, outbound links, specialized markup, and parsing/tests), but it is primarily a feature enhancement layered on top of existing behavior rather than a broader infrastructure improvement.