Conflict in src/web/routes/session-routes.ts (the import block) resolved
by keeping both sides: #680's claudeProjectDirName import stays, and the
fastify import takes #690's form without FastifyReply, since #690 moved
abortOnClientHangUp (its only user here) into route-helpers.ts.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>