Establishes the server-TypeScript foundation and migrates utils/money →
utils/money.mts with branded Cents/Dollars (mirroring the client), so the
cents↔dollars boundary — the origin of the reconciliation bug class — is a
compile error for any typed server caller.
Approach (no build step): Node 25 runs .ts natively (type-stripping).
Migrated modules use the explicit-ESM .mts extension (the project is
"type":"commonjs", which disables .ts ESM auto-detection) and are required
from the CJS callers via Node's require(esm) — verified working. Infra:
tsconfig.server.json (allowJs + checkJs:false → incremental like the
client), npm run typecheck:server, check:server extended to .mts, wired
into ci. 28 require sites repointed to money.mts.
typecheck:server clean; full server suite 225 + e2e probe 17/17 green.
Co-Authored-By: Claude Opus 4.8 <[email protected]>
- 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 <[email protected]>
- extract buildUserDbExportFile() from routes/export.js so the SQLite user-DB
export is testable (route behavior unchanged)
- tests/exportImportRoundTrip.test.js: export user A (bill/payment/override) →
import into fresh user B → assert all money survives exactly in cents. Confirms
the export(fromCents)/import(toCents) conversion is symmetric — no 100x drift —
and guards it from regressing.
Co-Authored-By: Claude Opus 4.8 <[email protected]>
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