- add company existence check on quota-windows route to guard against
sentinel and forged company IDs (was a no-op assertCompanyAccess)
- fix useDateRange minuteTick memo frozen at mount; realign interval to
next calendar minute boundary via setTimeout + intervalRef pattern
- fix midnight timer in Costs.tsx to use stable [] dep and
self-scheduling todayTimerRef to avoid StrictMode double-invoke
- return null for rolling window rows with no DB data instead of
rendering $0.00 / 0 tok false zeros
- fix secondsToWindowLabel to handle windows >168h with actual day count
instead of silently falling back to 7d
- fix byProvider.get(p) non-null assertion to use ?? [] fallback
db20f4f46e