chore: repo-wide bloat sweep, remove dead code and fold duplicate helpers (#2150)

* chore: repo-wide bloat sweep, remove dead code and fold duplicate helpers

Remove 33 dead files, ~270 unreferenced exports/types, 13 dead i18n
namespaces and 4 unused dependencies; fold byte-identical helper copies
into one canonical home each (lib/utils chunk/sleep/utcDateStamp,
lib/dates/iso, lib/invariants/uuid, lib/xml/escape, lib/reports/sru/format,
lib/pdf/number-text, lib/browser/panel-request, lib/api/v1/body +
v1ValidationError rolled out to ~55 v1 routes, booking-template schemas).

No behaviour change: v1 bodies and status codes, MCP tool schemas, DB
writes and money math are untouched. Naive ore rounding was deliberately
not swapped for roundOre; see DECISIONS.md 2026-09-02 for the full list
of things left alone on purpose.

tsc, lint, 19588 unit tests and check:guards green; antipattern baseline
ratcheted (naive-ore-round 622 -> 620, hand-rolled-invariant 115 -> 113).

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

* test(transactions): import RawTransaction from @/types after the ingest re-export removal

CI's type ratchet (check:types, full tsconfig) caught the one test file
that still imported the type through lib/transactions/ingest.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

---------

Co-authored-by: Jakob Wennberg <311770904+jakobwennberg-oss@users.noreply.github.com>
Co-authored-by: Claude Fable 5.1 <noreply@anthropic.com>

lib/pdf/number-text.ts

@@ -38,3 +38,23 @@ export function pdfNumberText(text: string): string {
 export function pdfText(text: string): string {
   return text.replaceAll(UNICODE_MINUS, '-')
 }
+
+/**
+ * Two-decimal sv-SE amount for a react-pdf <Text>: the same Intl call as
+ * lib/utils formatAmount, run through pdfNumberText so a negative årets
+ * resultat or a credit note never prints unsigned (issue #1982).
+ */
+export function pdfAmount(amount: number): string {
+  return pdfNumberText(
+    new Intl.NumberFormat('sv-SE', {
+      minimumFractionDigits: 2,
+      maximumFractionDigits: 2,
+    }).format(amount),
+  )
+}
+
+/** ISO date string as sv-SE (YYYY-MM-DD in the server timezone); empty input stays empty. */
+export function formatDateSv(iso: string): string {
+  if (!iso) return ''
+  return new Date(iso).toLocaleDateString('sv-SE')
+}