- GET /api/export now accepts a date range (?from=&to= on paid_date) in addition
to ?year=, for CSV or JSON; filename derived from the range. Validates the
range (both bounds, from<=to).
- New GET /api/export/user-json — full portable JSON of the user's data, reusing
the same getUserExportData assembly as the SQLite/Excel exports (money via
fromCents).
- UI (DownloadMyDataSection): a JSON export card plus a "Payments export" with
From/To dates and a CSV/JSON toggle; shared blob-download helper; toasts and
client-side range validation.
Tests: tests/exportRicher.test.js (JSON assembly in dollars, year vs range
filtering, CSV filename, bad-range rejection). Server 134 pass; build clean.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>