fix(expenses): review follow-ups from #2317 (#2326)

- The Utlägg nav row is computed server-side, so the first booked claim
  now refreshes the App Router tree instead of staying hidden until a
  full reload.
- The dialog's default date is the local calendar date; toISOString() is
  UTC and dated a receipt booked after midnight CEST to the previous day.
- listExpensePayoutsDue pages through every registered claim with
  fetchAllRows instead of stopping at 500 rows: a person omitted or a
  total understated there is money the company owes someone.
- The attention resource's payout instruction names the liability
  account per row (2893 / 2018 / 2820) instead of only 2893/2820.


Claude-Session: https://claude.ai/code/session_01P8YsvPqjfGxGZUkGeBVUWQ

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

components/extensions/general/RegisterExpenseDialog.tsx

@@ -62,7 +62,12 @@ interface Props {
 const OWNER_FALLBACK_NAME = 'Ägare'
 
 function todayIso(): string {
-  return new Date().toISOString().slice(0, 10)
+  // Local calendar date: toISOString() is UTC and would date a receipt booked
+  // after midnight CEST to the previous day (wrong period, wrong FX rate).
+  const now = new Date()
+  const mm = String(now.getMonth() + 1).padStart(2, '0')
+  const dd = String(now.getDate()).padStart(2, '0')
+  return `${now.getFullYear()}-${mm}-${dd}`
 }
 
 function parseAmount(raw: string): number {