CompanySlice's standalone currentCompanyId field + setCurrentCompanyId action
were never written by any caller, so useDesktopEvents.ts read null and fell
through to full refresh for every entity event -- the granular patch
machinery was dead code.
- Remove currentCompanyId field + setCurrentCompanyId from CompanySlice
- refreshBadges reads from snapshot.currentCompanyId
- useDesktopEvents reads companyId from snapshot.currentCompanyId
- Update store unit test to seed snapshot instead of calling removed action