feat: standing instructions UI - view redesign, edit pre-fill fix, current account tab improvements

- Redesign view-standing-instructions with sectioned layout (General Info, From Account,
  To Account, Transfer Settings, Recurrence) using info-grid/info-row CSS pattern with
  color-coded status badge
- Fix edit-standing-instructions: remove buggy recurrenceOnMonthDay.push() crash that
  caused all form fields to be empty; add parseISODate() and parseMonthDay() helpers
  handling both ISO string and array formats; add null safety with ?. guards on all fields
- Fix edit form patchValue: fromAccount and toAccount show as 'productName - accountNo'
- Improve current account standing-instructions-tab HTML with ?. null guards
- Add missing i18n keys: General Information, From Account, To Account, Transfer Settings,
  Recurrence Settings, Valid From, Valid Till

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/app/current-accounts/current-accounts.service.ts

@@ -101,7 +101,7 @@ export class CurrentAccountsService {
       .set('clientId', clientId)
       .set('clientName', clientName)
       .set('fromAccountId', fromAccountId)
-      .set('fromAccountType', '2')
+      .set('fromAccountType', '3')
       .set('locale', locale)
       .set('dateFormat', dateFormat);
     return this.http.get(`/standinginstructions`, { params: httpParams });