fix(transactions): keep booking dialog open while typing in the agent sheet (#1966)

* fix(transactions): keep booking dialog open while typing in the agent sheet

TransactionBookingDialog was a default modal Radix dialog; the agent
sheet is a fixed z-[60] panel portaled outside its DOM, so a click in
the assistant's text field counted as an outside interaction and
dismissed the dialog, losing the half-filled booking.

Apply the established non-modal convention (NewInvoiceDialog /
NewJournalEntryDialog): modal={false} + DialogVeil, with escape and
outside-dismiss prevented. Closing is explicit via the header X.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* fix(transactions): restore page modality via inert while booking dialog is open

Skeptic review caught that the non-modal convention was ported
incompletely: NewInvoiceDialog pairs modal={false} with an inert effect
on #dash-shell. Without it the background page stayed keyboard-, AT-,
and (mobile nav) tap-reachable behind the veil, so a stray Shift+Tab
plus Enter could navigate away and destroy a half-filled booking.

Also corrects the comment that cited NewJournalEntryDialog as non-modal
precedent (it is plain modal).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

components/transactions/TransactionBookingDialog.tsx

@@ -1,8 +1,8 @@
 'use client'
 
-import { useMemo, useState } from 'react'
+import { useEffect, useMemo, useState } from 'react'
 import { useTranslations } from 'next-intl'
-import { Dialog, DialogContent, DialogHeader, DialogTitle, DialogDescription } from '@/components/ui/dialog'
+import { Dialog, DialogContent, DialogHeader, DialogTitle, DialogDescription, DialogVeil } from '@/components/ui/dialog'
 import { Button } from '@/components/ui/button'
 import { useToast } from '@/components/ui/use-toast'
 import { formatCurrency, formatDate } from '@/lib/utils'
@@ -158,6 +158,21 @@ export default function TransactionBookingDialog({
     return { bankAccount: account, bankAccountName: matched?.name ?? null }
   }, [transaction, cashAccounts, cashAccountsLoading])
 
+  // The dialog is non-modal (see the Dialog below), so Radix does not trap
+  // focus or inert the page. Restore page modality by hand: `inert` on the
+  // dash shell blocks pointer, keyboard, and AT access to the page behind
+  // (including the mobile bottom nav, which sits above the veil), while the
+  // agent sheet (outside the shell) stays live. Same as NewInvoiceDialog.
+  useEffect(() => {
+    if (!open) return
+    const shell = document.getElementById('dash-shell')
+    if (!shell) return
+    shell.inert = true
+    return () => {
+      shell.inert = false
+    }
+  }, [open])
+
   if (!transaction) return null
 
   const isIncome = transaction.amount > 0
@@ -253,8 +268,21 @@ export default function TransactionBookingDialog({
         setInboxPickerOpen(false)
       }
       onOpenChange(o)
-    }}>
-      <DialogContent className="max-w-6xl max-h-[90vh] overflow-y-auto">
+    }} modal={false}>
+      <DialogVeil />
+      <DialogContent
+        className="max-w-6xl max-h-[90vh] overflow-y-auto"
+        // Non-modal so the agent sheet (fixed z-[60], portaled outside this
+        // dialog) stays interactive beside a booking in progress; a click in
+        // its text field must not count as outside-dismissal. A half-booked
+        // transaction must also survive a stray Escape or backdrop click.
+        // Closing is explicit: the header X. Same convention as
+        // NewInvoiceDialog (which pairs non-modality with the inert effect
+        // above).
+        onEscapeKeyDown={(e) => e.preventDefault()}
+        onPointerDownOutside={(e) => e.preventDefault()}
+        onInteractOutside={(e) => e.preventDefault()}
+      >
         <DialogHeader>
           <DialogTitle>{t('title')}</DialogTitle>
           <DialogDescription className="sr-only">