fix(transactions): use the resolved cash account name as bank line description (#899)

The booking dialog's bank line description was always the generic
"bank_line_description" translation regardless of which cash account
was actually resolved via resolveAccount(). This was accurate while
the bank line was hardcoded to 1930, but now that the dialog resolves
the real cash_account_id (#769) it can pick a different account whose
own name should show up on the line instead.

Signed-off-by: Jonas Flodén <jonas@floden.nu>

components/transactions/TransactionBookingDialog.tsx

@@ -117,10 +117,12 @@ export default function TransactionBookingDialog({
   const [pickedInboxDocs, setPickedInboxDocs] = useState<AvailableInboxDoc[]>([])
   const [inboxPickerOpen, setInboxPickerOpen] = useState(false)
   const [bankAccount, setBankAccount] = useState<string | null>(null)
+  const [bankAccountName, setBankAccountName] = useState<string | null>(null)
 
   useEffect(() => {
     if (!open || !transaction) return
     setBankAccount(null)
+    setBankAccountName(null)
     let cancelled = false
     fetch('/api/cash-accounts')
       .then((r) => {
@@ -135,7 +137,12 @@ export default function TransactionBookingDialog({
           transaction.cash_account_id ?? null,
           transaction.currency ?? 'SEK',
         )
+        // Use the matched account's own name instead of a generic label.
+        const matched =
+          accounts.find((a) => a.id === transaction.cash_account_id) ??
+          accounts.find((a) => a.ledger_account === account)
         setBankAccount(account)
+        setBankAccountName(matched?.name ?? null)
       })
       .catch(() => {
         if (!cancelled) setBankAccount('1930')
@@ -362,7 +369,7 @@ export default function TransactionBookingDialog({
                 initialLines={
                   preselectedTemplate
                     ? buildInitialLinesFromTemplate(transaction, preselectedTemplate, bankAccount)
-                    : buildInitialLines(transaction, t('bank_line_description'), bankAccount)
+                    : buildInitialLines(transaction, bankAccountName ?? t('bank_line_description'), bankAccount)
                 }
                 initialDate={transaction.date}
                 initialDescription={transaction.description}