~x-ai/grok-latest → A (2:1)

A completes a real architectural migration: deletes the separate `/post` stack and `web_post.rs`, consolidates auth into `resolve_web_session`/`WebSession`, and routes browser ingest/check/redact through a single `POST /ui` + `__rpc__` path with matching HTML/JS and tests. B is a worthwhile correctness cleanup (drop GitDiscovery legacy projection, require Emission evidence fields), but it is mostly deletion of display fallbacks rather than a multi-surface design change of comparable scope.