fix(expenses): review follow-ups from #2333 (#2352)

- The owner's claimant key is trimmed and lower-cased, the same rule the
  payout RPC applies, so "Jakob" and "jakob " are one person with one
  Att göra row and one exact-amount match.
- The inbox pages through every registered claim (fetchAllRows) before
  pairing, so a long backlog can never understate a person's debt.
- A foreign receipt's VAT field is locked at 0 and 0 is what is submitted.
- Transport failures in the one-click and picker confirms show the
  destructive toast instead of failing silently.
- The open-claims flag is set only after the stale-fetch guard, and a
  payout match decrements the inbox count like every other row exit.
- Test: reset the live-link mock before the bank_line junction case.
- Wording: "Återbetalning av utlägg".

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

lib/expenses/__tests__/expense-payout-candidates.test.ts

@@ -18,6 +18,15 @@ describe('groupExpenseClaimsByPerson', () => {
     expect(out[0].claim_ids).toEqual(['a', 'b'])
   })
 
+  it('treats "Jakob" and "jakob " as one owner, the way the payout RPC does', () => {
+    const out = groupExpenseClaimsByPerson([
+      { id: 'a', employee_id: null, claimant_name: 'Jakob', liability_account: '2893', amount_sek: 100, expense_date: '2026-09-01' },
+      { id: 'b', employee_id: null, claimant_name: 'jakob ', liability_account: '2893', amount_sek: 50, expense_date: '2026-09-02' },
+    ])
+    expect(out).toHaveLength(1)
+    expect(out[0]).toMatchObject({ key: 'owner:jakob', claimant_name: 'Jakob', total_sek: 150, claim_ids: ['a', 'b'] })
+  })
+
   it('leaves an enskild firma owner out: egen insättning is not a debt', () => {
     const out = groupExpenseClaimsByPerson([
       { id: 'a', employee_id: null, claimant_name: 'Sara', liability_account: '2018', amount_sek: 500, expense_date: '2026-09-01' },