"""
Core of Dataset Utils — shared by every feature:

    core.common    sign-in / token helpers, shared UI constants, AppContext
    core.jobs      the server-side job queue (backbone): Job, JobManager, submit_job
    core.jobs_tab  the 📋 Jobs tab (status / logs / cancel of queued jobs)

Features live in `features/` and only build their own tab + submit jobs through `core.jobs`.
"""