The XLSX importer (workbook parse → per-row decision tree → bulk actions →
bill-history grouped import). Typed PreviewRow/Decision/BillGroup/ImportDetail
and the merged BillImportResult accumulator; fixed Date subtraction in the
duplicate-date sort to use getTime(). Dropped two unused imports (CountPill/fmt)
the original .jsx never used. Trimmed unused eslint-disable directives.
This completes the entire client/components/data/ directory (14 files) → .tsx.
typecheck 0, lint 0 errors, build green.
80fb0043b6