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/import/BankFileResultStep.tsx

@@ -10,7 +10,7 @@ import {
   ArrowRight,
   RotateCcw,
 } from 'lucide-react'
-import type { IngestResult } from '@/lib/transactions/ingest'
+import type { IngestResult } from '@/types'
 
 interface BankFileResultStepProps {
   result: IngestResult

components/import/SIEUploadStep.tsx

@@ -4,7 +4,7 @@ import { useState, useCallback, useEffect } from 'react'
 import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card'
 import { Progress } from '@/components/ui/progress'
 import { Button } from '@/components/ui/button'
-import { Upload, FileText, AlertCircle, CheckCircle, Loader2, XCircle, RefreshCw } from 'lucide-react'
+import { Upload, AlertCircle, CheckCircle, Loader2, XCircle, RefreshCw } from 'lucide-react'
 
 const LOADING_PHASES = [
   { message: 'Läser fil...', progress: 10 },