v0.8.4

Fixed: Codex 5h/7d quota no longer collapses to No Data after the session goes idle; the last reliable reading is retained until each window resets, instead of being cleared on the 15-minute rollout activity window (#162).
Fixed: Codex usage-limit badge now shows a correct resets-in countdown that targets the binding window, survives the block and an app restart, and no longer lingers forever or vanishes on idle (#172).