fix(reports): localize latest voucher label (#1365)

Closes #1267

lib/reports/__tests__/latest-vouchers.test.ts

@@ -2,6 +2,8 @@ import { describe, it, expect, vi, beforeEach } from 'vitest'
 import { getLatestPostedVouchers } from '../latest-vouchers'
 import { formatLatestVouchers, LATEST_VOUCHERS_LABEL } from '../latest-vouchers-format'
 import { createQueuedMockSupabase } from '@/tests/helpers'
+import enMessages from '../../../messages/en.json'
+import svMessages from '../../../messages/sv.json'
 
 beforeEach(() => {
   vi.clearAllMocks()
@@ -184,4 +186,9 @@ describe('formatLatestVouchers', () => {
     // the books, and a reconciler told the wrong one chases a phantom gap.
     expect(LATEST_VOUCHERS_LABEL).toBe('Senaste bokförda verifikat')
   })
+
+  it('keeps the web label explicit in both supported locales', () => {
+    expect(svMessages.reports.latest_posted_vouchers).toBe(LATEST_VOUCHERS_LABEL)
+    expect(enMessages.reports.latest_posted_vouchers).toBe('Latest posted vouchers')
+  })
 })

lib/reports/latest-vouchers-format.ts

@@ -9,7 +9,9 @@ import type { LatestVoucherPerSeries } from '@/types'
  */
 
 /**
- * Swedish-only report surface (see .claude/rules/i18n.md).
+ * Swedish label for PDF and spreadsheet exports, whose complete document
+ * chrome currently renders in Swedish. Client views use the localized
+ * `reports.latest_posted_vouchers` message instead.
  *
  * The wording is load-bearing: this is the last POSTED number, not the last
  * number the sequence counter handed out. A reconciler who assumes the other