v0.28.0

What's Changed

• feat(chat): working/waiting activity dots on conductors by @jrothrock in #396
• fix(chat): stick-to-bottom scroll + global chat routes code work to a sandbox by @jrothrock in #397
• fix(conductor): warn that background tasks don't survive a turn by @jrothrock in #398
• feat(chat): inline merge jobs in the conductor rail; remove Work tab + worker endpoint by @jrothrock in #399
• feat(conductor): feed the global chat Corral's known repos upfront by @jrothrock in #400
• feat(repos): repo-level image/cache view + teach the agent to build images by @jrothrock in #401
• feat(repos): POST /api/repos//build-image — build + cache a repo's image by @jrothrock in #402

Full Changelog: v0.27.0...v0.28.0