Refresh loop

Cadence

• RefreshFrequency: Manual, 1m, 2m, 5m (default), 15m, 30m.
• Stored in UserDefaults via SettingsStore.

Behavior

• Background refresh runs off-main and updates UsageStore (usage + credits + optional web scrape).
• Manual “Refresh now” always available in the menu.
• Stale/error states dim the icon and surface status in-menu.
• Optional provider-storage scans run only when “Show provider storage usage” is enabled. They are scheduled in the background, coalesced/throttled during automatic refreshes, and forced by manual refresh without blocking the usage refresh path.

Optional future

• Auto-seed a log if none exists via codex exec --skip-git-repo-check --json "ping" (currently not executed).

See also: docs/status.md, docs/ui.md.