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>

tests/helpers.ts

@@ -9,17 +9,13 @@ import type {
   JournalEntry,
   JournalEntryLine,
   DocumentAttachment,
-  TaxCode,
   Invoice,
-  InvoicePayment,
   Customer,
   Supplier,
   SupplierInvoice,
   CompanySettings,
   InvoiceInboxItem,
   CategorizationTemplate,
-  Company,
-  CompanyMember,
 } from '@/types'
 import type { SIEVoucher, SIETransactionLine } from '@/lib/import/types'
 
@@ -105,37 +101,6 @@ export function createMockSupabase() {
 let _counter = 0
 const nextId = () => `test-${++_counter}`
 
-export function makeCompany(overrides: Partial<Company> = {}): Company {
-  const { team_id = null, ...rest } = overrides
-  return {
-    id: 'company-1',
-    name: 'Test Company',
-    org_number: null,
-    entity_type: 'enskild_firma',
-    accounting_framework: 'k2',
-    created_by: 'user-1',
-    team_id,
-    archived_at: null,
-    created_at: '2024-01-01T00:00:00Z',
-    updated_at: '2024-01-01T00:00:00Z',
-    ...rest,
-  }
-}
-
-export function makeCompanyMember(overrides: Partial<CompanyMember> = {}): CompanyMember {
-  return {
-    id: 'member-1',
-    company_id: 'company-1',
-    user_id: 'user-1',
-    role: 'owner',
-    invited_by: null,
-    joined_at: '2024-01-01T00:00:00Z',
-    created_at: '2024-01-01T00:00:00Z',
-    updated_at: '2024-01-01T00:00:00Z',
-    ...overrides,
-  }
-}
-
 export function makeReceipt(overrides: Partial<Receipt> = {}): Receipt {
   return {
     id: nextId(),
@@ -319,28 +284,6 @@ export function makeDocumentAttachment(
   }
 }
 
-export function makeTaxCode(overrides: Partial<TaxCode> = {}): TaxCode {
-  return {
-    id: nextId(),
-    user_id: null,
-    code: 'MP1',
-    description: 'Utgående moms 25%',
-    rate: 25,
-    moms_basis_boxes: ['05'],
-    moms_tax_boxes: ['10'],
-    moms_input_boxes: [],
-    is_output_vat: true,
-    is_reverse_charge: false,
-    is_eu: false,
-    is_export: false,
-    is_oss: false,
-    is_system: true,
-    created_at: '2024-01-01T00:00:00Z',
-    updated_at: '2024-01-01T00:00:00Z',
-    ...overrides,
-  }
-}
-
 export function makeInvoice(overrides: Partial<Invoice> = {}): Invoice {
   return {
     id: nextId(),
@@ -381,27 +324,6 @@ export function makeInvoice(overrides: Partial<Invoice> = {}): Invoice {
   }
 }
 
-export function makeInvoicePayment(
-  overrides: Partial<InvoicePayment> = {}
-): InvoicePayment {
-  return {
-    id: nextId(),
-    user_id: 'user-1',
-    company_id: 'company-1',
-    invoice_id: 'invoice-1',
-    payment_date: '2024-07-01',
-    amount: 12500,
-    currency: 'SEK',
-    exchange_rate: null,
-    exchange_rate_difference: 0,
-    journal_entry_id: null,
-    transaction_id: null,
-    notes: null,
-    created_at: '2024-07-01T00:00:00Z',
-    ...overrides,
-  }
-}
-
 export function makeCustomer(overrides: Partial<Customer> = {}): Customer {
   return {
     id: nextId(),