Replace single-select customerFilter/salesFilter with OptionType[] multi-select
(customers, salesPersons, filterBy), switch SWR to httpClientFetcher with explicit
type, remove PDF export, enableReinitialize, useRef modal hack, useMemo on data/meta,
and useCallback on trivial handlers. Add formikResetHandler using resetFilter().
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
ValdiANS