Every report grows real entries: Overview day bars, expensive sessions
(provider+id matched), model names, task categories, Spend projects,
and PR cards. The Sessions destination renders the selection chips with
per-chip removal and Clear, fetches the contributions report once per
population (widened to cover the selected days so a day outside the top-bar
period still reconciles), computes every chip combination client-side over
the full population, and shows each row's contribution beside its full
cost. Row clicks open the side drawer (Escape closes, focus returns); the
top bar gains Back/Forward (Cmd+[ / Cmd+] on macOS, Alt+arrows elsewhere)
over the in-app history; the position survives a renderer restart. IPC
gains getSessionsContributions with the same argv validation as the plain
report.
