The review-conflict roundtrip test drives shell fixtures, so it lives with
the other roundtrip tests under mobile/src; from src/mobile-web it dragged
the whole shell tree into the page tsconfig. Also merges a duplicate
import and formats two drifted files.
Claude-Session: https://claude.ai/code/session_01JNnE9qzUZMMnqpZWCqM3nb