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>

components/agent-knowledge/LedgerGraph.tsx

@@ -6,7 +6,7 @@ import { RotateCw } from 'lucide-react'
 import { getAccountDescription } from '@/lib/bookkeeping/account-descriptions'
 import { useBasReference } from '@/lib/bookkeeping/use-bas-reference'
 import { useTranslations } from 'next-intl'
-import { formatCurrency } from '@/lib/utils'
+import { formatAmount, formatCurrency } from '@/lib/utils'
 import type { DeepEntity, DeepLedgerContext } from '@/lib/agent-context/ledger-deep'
 import { entityMagnitude, selectAccountRing, type RingBasis } from './ledger-graph-magnitude'
 
@@ -751,7 +751,7 @@ function DetailCard({ p, t }: { p: Payee; t: ReturnType<typeof useTranslations>
         <div className="flex justify-between gap-3">
           <span>{t('card_amount')}</span>
           <span className="tabular-nums" style={{ color: PAPER }}>
-            {e.total_amount.toLocaleString('sv-SE', { minimumFractionDigits: 2, maximumFractionDigits: 2 })}
+            {formatAmount(e.total_amount)}
           </span>
         </div>
         <div className="mt-2 border-t pt-2" style={{ borderColor: HAIR }}>