diff --git a/app/(dashboard)/layout.tsx b/app/(dashboard)/layout.tsx
index 70562ebe..c40b1eaa 100644
--- a/app/(dashboard)/layout.tsx
+++ b/app/(dashboard)/layout.tsx
@@ -515,7 +515,6 @@ export default async function DashboardLayout({
               )}
             </MainContainer>
           </main>
-          <AgentTrigger hidden={userPrefs?.hide_assistant_fab === true} />
           {/* One-time expired-trial notice. Sandbox/anonymous demo users have
               no billing (their companies carry trial grants too), so the gate
               lives here where both flags are known. Acknowledgement persists
@@ -533,6 +532,10 @@ export default async function DashboardLayout({
           <SettingsHotkey />
           {settingsModal}
         </div>
+        {/* Outside #dash-shell on purpose: non-modal dialogs (booking,
+            invoice) set `inert` on the shell while open, and the assistant
+            entry point must stay clickable then, like the sheet itself. */}
+        <AgentTrigger hidden={userPrefs?.hide_assistant_fab === true} />
         {!isSandbox && (
           <AnalyticsIdentify
             user={{
diff --git a/app/(dashboard)/transactions/page.tsx b/app/(dashboard)/transactions/page.tsx
index e2ffee2d..e7ea82f6 100644
--- a/app/(dashboard)/transactions/page.tsx
+++ b/app/(dashboard)/transactions/page.tsx
@@ -8,7 +8,7 @@ import { useSearchParams } from 'next/navigation'
 import { useTranslations } from 'next-intl'
 import { Button } from '@/components/ui/button'
 import { Badge } from '@/components/ui/badge'
-import { Dialog, DialogContent, DialogHeader, DialogTitle } from '@/components/ui/dialog'
+import { Dialog, DialogContent, DialogHeader, DialogTitle, DialogVeil, useDashShellInert } from '@/components/ui/dialog'
 import { useToast } from '@/components/ui/use-toast'
 import { ToastAction } from '@/components/ui/toast'
 import { ConfirmationDialog } from '@/components/ui/confirmation-dialog'
@@ -350,6 +350,9 @@ export default function TransactionsPage() {
   // Template picker dialog
   const [templatePickerOpen, setTemplatePickerOpen] = useState(false)
   const [templatePickerTransaction, setTemplatePickerTransaction] = useState<TransactionWithInvoice | null>(null)
+  // The picker renders non-modal (agent sheet stays usable); hand-restore
+  // page modality while it is open. See useDashShellInert in ui/dialog.tsx.
+  useDashShellInert(templatePickerOpen)
 
   // Invoice picker dialog (manual match)
   const [invoicePickerOpen, setInvoicePickerOpen] = useState(false)
@@ -4020,8 +4023,17 @@ export default function TransactionsPage() {
         />
       )}
 
-      {templatePickerOpen && <Dialog open onOpenChange={setTemplatePickerOpen}>
-        <DialogContent className="max-w-lg max-h-[80vh] overflow-y-auto">
+      {/* Non-modal so the agent sheet and its trigger stay usable while
+          picking (useDashShellInert above hand-restores page modality).
+          Esc and veil-click still close: the picker holds no user input.
+          Clicks in the assistant don't dismiss: data-agent-ui counts as
+          inside (see DialogContent). */}
+      {templatePickerOpen && <Dialog open onOpenChange={setTemplatePickerOpen} modal={false}>
+        <DialogVeil />
+        {/* Width capped at the space left of a docked sheet (--agent-sheet-w
+            is docked-only) so the picker never clips off-screen left on
+            narrow desktops; sheet closed = the old max-w-lg. */}
+        <DialogContent className="max-w-[min(32rem,calc(100vw-var(--agent-sheet-w,0px)))] max-h-[80vh] overflow-y-auto">
           <DialogHeader>
             <DialogTitle>Bokför transaktion</DialogTitle>
           </DialogHeader>
diff --git a/components/agent/AgentSheet.tsx b/components/agent/AgentSheet.tsx
index af4de21a..2a847404 100644
--- a/components/agent/AgentSheet.tsx
+++ b/components/agent/AgentSheet.tsx
@@ -563,6 +563,9 @@ export default function AgentSheet({
       ref={sheetRef}
       role="dialog"
       aria-label={displayTitle}
+      // Interactions here must never dismiss an open (non-modal) dialog:
+      // DialogContent treats data-agent-ui as inside the dialog.
+      data-agent-ui=""
       // z-[60] sits above the mobile bottom nav (z-50) so on phones the sheet
       // covers the full screen including where the nav would otherwise show.
       // `hidden` (display:none) when collapsed keeps the component mounted (the
diff --git a/components/agent/AgentSheetProvider.tsx b/components/agent/AgentSheetProvider.tsx
index 472dd6e0..470502fd 100644
--- a/components/agent/AgentSheetProvider.tsx
+++ b/components/agent/AgentSheetProvider.tsx
@@ -274,15 +274,23 @@ export function AgentSheetProvider({
   // beside the answer. Written as a CSS variable rather than a class on <main>
   // because the frame layout is a server component; globals.css seeds the
   // default so the first paint is not a jump.
+  // --agent-sheet-w is the docked-only sibling: unlike --agent-dock-w it has
+  // NO stylesheet default (globals.css seeds dock-w at the 10px frame gutter),
+  // so consumers that must be a no-op when the sheet is closed (dialog
+  // centering and width caps in ui/dialog.tsx and the wide booking/review
+  // dialogs) read this one and get their 0px fallback.
   useEffect(() => {
     const root = document.documentElement
     if (dockWidth === null) {
       root.style.removeProperty('--agent-dock-w')
+      root.style.removeProperty('--agent-sheet-w')
       return
     }
     root.style.setProperty('--agent-dock-w', `${dockWidth}px`)
+    root.style.setProperty('--agent-sheet-w', `${dockWidth}px`)
     return () => {
       root.style.removeProperty('--agent-dock-w')
+      root.style.removeProperty('--agent-sheet-w')
     }
   }, [dockWidth])
 
diff --git a/components/agent/AgentTrigger.tsx b/components/agent/AgentTrigger.tsx
index fb483c07..ac976216 100644
--- a/components/agent/AgentTrigger.tsx
+++ b/components/agent/AgentTrigger.tsx
@@ -222,7 +222,15 @@ export default function AgentTrigger({ hidden = false }: { hidden?: boolean }) {
       // the page declares a bottom action bar (body[data-page-bottom-bar],
       // set by e.g. the standalone invoice editor): lift above it so the FAB
       // never covers the bar's primary button.
-      className={`fixed right-4 z-30 ${visibilityClass} h-12 max-w-[calc(100vw-2rem)] items-stretch rounded-full bg-foreground text-background shadow-lg bottom-[calc(env(safe-area-inset-bottom,0px)+5rem)] md:bottom-4 md:[body[data-page-bottom-bar]_&]:bottom-20`}
+      // z-[45]: above the DialogVeil (z-40) so the assistant can be OPENED
+      // while a non-modal dialog (booking, invoice) holds the page inert, but
+      // below dialog content (z-50). Under a true modal dialog Radix sets
+      // pointer-events: none on <body>, which keeps the trigger dead there
+      // regardless of z.
+      // data-agent-ui: opening the assistant must not dismiss an open
+      // non-modal dialog (DialogContent treats this as inside).
+      data-agent-ui=""
+      className={`fixed right-4 z-[45] ${visibilityClass} h-12 max-w-[calc(100vw-2rem)] items-stretch rounded-full bg-foreground text-background shadow-lg bottom-[calc(env(safe-area-inset-bottom,0px)+5rem)] md:bottom-4 md:[body[data-page-bottom-bar]_&]:bottom-20`}
     >
       <button
         onClick={handleClick}
diff --git a/components/invoices/NewInvoiceDialog.tsx b/components/invoices/NewInvoiceDialog.tsx
index c1354926..85ce144f 100644
--- a/components/invoices/NewInvoiceDialog.tsx
+++ b/components/invoices/NewInvoiceDialog.tsx
@@ -2,7 +2,7 @@
 
 import { useEffect, useMemo, useState } from 'react'
 import { useTranslations } from 'next-intl'
-import { Dialog, DialogContent, DialogTitle, DialogVeil } from '@/components/ui/dialog'
+import { Dialog, DialogContent, DialogTitle, DialogVeil, useDashShellInert } from '@/components/ui/dialog'
 import { Skeleton } from '@/components/ui/skeleton'
 import { Button } from '@/components/ui/button'
 import { createClient } from '@/lib/supabase/client'
@@ -112,21 +112,9 @@ export default function NewInvoiceDialog({ open, onOpenChange, copyFromId = null
   const copyInitial = copyLoad.sourceId === copyFromId ? copyLoad.initial : null
   const copyLoadFailed = copyLoad.sourceId === copyFromId && copyLoad.failed
 
-  // The dialog is non-modal so the agent sheet (a body-level sibling at
-  // z-[60]) stays clickable and focusable above it: Radix modal mode sets
-  // body pointer-events: none and traps focus, which left the visible chat
-  // input dead. Page modality is restored by hand instead: `inert` on the
-  // dash shell blocks pointer, keyboard, and AT access to the page behind,
-  // while the agent sheet (outside the shell) stays live.
-  useEffect(() => {
-    if (!open) return
-    const shell = document.getElementById('dash-shell')
-    if (!shell) return
-    shell.inert = true
-    return () => {
-      shell.inert = false
-    }
-  }, [open])
+  // Non-modal dialog (see below): page modality is restored by hand so the
+  // agent sheet stays live. See useDashShellInert in components/ui/dialog.tsx.
+  useDashShellInert(open)
 
   return (
     <Dialog open={open} onOpenChange={onOpenChange} modal={false}>
diff --git a/components/transactions/QuickReviewDialog.tsx b/components/transactions/QuickReviewDialog.tsx
index 80db42f5..66fdcade 100644
--- a/components/transactions/QuickReviewDialog.tsx
+++ b/components/transactions/QuickReviewDialog.tsx
@@ -6,7 +6,7 @@ import { useRouter } from 'next/navigation'
 import { useTranslations } from 'next-intl'
 import { Badge } from '@/components/ui/badge'
 import { Button } from '@/components/ui/button'
-import { Dialog, DialogContent, DialogHeader, DialogTitle, DialogDescription } from '@/components/ui/dialog'
+import { Dialog, DialogContent, DialogHeader, DialogTitle, DialogDescription, DialogVeil, useDashShellInert } from '@/components/ui/dialog'
 import { useToast } from '@/components/ui/use-toast'
 import { ToastAction } from '@/components/ui/toast'
 import { formatCurrency, formatDate } from '@/lib/utils'
@@ -203,6 +203,10 @@ export default function QuickReviewDialog({
     }
   }, [open, transaction, t])
 
+  // Non-modal dialog (see the Dialog below): hand-restore page modality so
+  // the agent sheet stays live. See useDashShellInert in ui/dialog.tsx.
+  useDashShellInert(open)
+
   if (!transaction || !category) return null
 
   const tx = enrichedTx ?? transaction
@@ -432,7 +436,11 @@ export default function QuickReviewDialog({
   }
 
   return (
-    <Dialog open={open} onOpenChange={isProcessing ? undefined : (o) => {
+    // Non-modal so the agent sheet and its trigger stay usable during review
+    // (useDashShellInert above hand-restores page modality). Existing
+    // dismissal semantics kept: Esc/veil-click close unless processing, and
+    // assistant clicks never dismiss (data-agent-ui counts as inside).
+    <Dialog modal={false} open={open} onOpenChange={isProcessing ? undefined : (o) => {
       if (!o) {
         setUploadedFiles([])
         setPickedInboxDocs([])
@@ -440,7 +448,11 @@ export default function QuickReviewDialog({
       }
       onOpenChange(o)
     }}>
-      <DialogContent className={preAttachedDocumentId ? 'max-w-6xl max-h-[90vh] overflow-y-auto' : 'max-w-md sm:max-w-lg max-h-[85vh] overflow-y-auto'}>
+      <DialogVeil />
+      {/* Both variants cap at the space left of a docked agent sheet so the
+          right edge never lands unreachable under it (sheet is z-60).
+          --agent-sheet-w is docked-only: sheet closed = the old widths. */}
+      <DialogContent className={preAttachedDocumentId ? 'max-w-[min(72rem,calc(100vw-var(--agent-sheet-w,0px)))] max-h-[90vh] overflow-y-auto' : 'max-w-[min(28rem,calc(100vw-var(--agent-sheet-w,0px)))] sm:max-w-[min(32rem,calc(100vw-var(--agent-sheet-w,0px)))] max-h-[85vh] overflow-y-auto'}>
         <DialogHeader>
           <DialogTitle>{t('title')}</DialogTitle>
           <DialogDescription>
diff --git a/components/transactions/TransactionBookingDialog.tsx b/components/transactions/TransactionBookingDialog.tsx
index 137d3967..995a3b5b 100644
--- a/components/transactions/TransactionBookingDialog.tsx
+++ b/components/transactions/TransactionBookingDialog.tsx
@@ -1,8 +1,8 @@
 'use client'
 
-import { useEffect, useMemo, useState } from 'react'
+import { useMemo, useState } from 'react'
 import { useTranslations } from 'next-intl'
-import { Dialog, DialogContent, DialogHeader, DialogTitle, DialogDescription, DialogVeil } from '@/components/ui/dialog'
+import { Dialog, DialogContent, DialogHeader, DialogTitle, DialogDescription, DialogVeil, useDashShellInert } from '@/components/ui/dialog'
 import { Button } from '@/components/ui/button'
 import { useToast } from '@/components/ui/use-toast'
 import { formatCurrency, formatDate } from '@/lib/utils'
@@ -158,20 +158,9 @@ 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])
+  // Non-modal dialog (see below): page modality is restored by hand so the
+  // agent sheet stays live. See useDashShellInert in components/ui/dialog.tsx.
+  useDashShellInert(open)
 
   if (!transaction) return null
 
@@ -271,7 +260,11 @@ export default function TransactionBookingDialog({
     }} modal={false}>
       <DialogVeil />
       <DialogContent
-        className="max-w-6xl max-h-[90vh] overflow-y-auto"
+        // Width caps at the space left of a docked agent sheet so the form's
+        // right edge, and the Granska button, never end up unreachable under
+        // the sheet (z-60 over z-50). --agent-sheet-w is docked-only, so with
+        // the sheet closed this is exactly the old max-w-6xl.
+        className="max-w-[min(72rem,calc(100vw-var(--agent-sheet-w,0px)))] 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
diff --git a/components/ui/dialog.tsx b/components/ui/dialog.tsx
index 6c3f2679..e7e0d945 100644
--- a/components/ui/dialog.tsx
+++ b/components/ui/dialog.tsx
@@ -40,11 +40,13 @@ const DialogContent = React.forwardRef<
       // are portaled to document.body so this content's overflow-y-auto can
       // never clip them. DOM-wise that puts them OUTSIDE the dialog, so Radix
       // would otherwise dismiss the dialog on a pointerdown inside them:
-      // anything marked data-dialog-companion counts as inside.
+      // anything marked data-dialog-companion counts as inside. The agent
+      // sheet and its trigger (data-agent-ui) count as inside for the same
+      // reason: writing to the assistant must never dismiss a dialog.
       onInteractOutside={(event) => {
         onInteractOutside?.(event)
         const target = event.target
-        if (target instanceof Element && target.closest('[data-dialog-companion]')) {
+        if (target instanceof Element && target.closest('[data-dialog-companion], [data-agent-ui]')) {
           event.preventDefault()
         }
       }}
@@ -53,7 +55,14 @@ const DialogContent = React.forwardRef<
         // child's min-content, and nowrap text (truncate) counts at full width
         // there, so one long description widens every sibling past the dialog
         // edge. minmax(0,1fr) caps the track at the content box.
-        "fixed left-[50%] top-[50%] z-50 grid grid-cols-[minmax(0,1fr)] w-full max-w-lg translate-x-[-50%] translate-y-[-50%] gap-4 border bg-background p-6 shadow-[var(--shadow-md)] max-h-[calc(100dvh-2rem)] overflow-y-auto scrollbar-visible data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-98 data-[state=open]:zoom-in-98 sm:rounded-xl",
+        // left: centered in the viewport MINUS the docked agent sheet.
+        // --agent-sheet-w exists as an inline var on <html> ONLY while the
+        // sheet is docked open (AgentSheetProvider); closed/floating falls to
+        // the 0px fallback, making this exactly left-[50%]. Do NOT read
+        // --agent-dock-w here: globals.css seeds that at 10px permanently.
+        // Without the shift a wide dialog centers under the sheet and its
+        // right edge becomes unreachable (sheet is z-60).
+        "fixed left-[calc((100vw-var(--agent-sheet-w,0px))/2)] top-[50%] z-50 grid grid-cols-[minmax(0,1fr)] w-full max-w-lg translate-x-[-50%] translate-y-[-50%] gap-4 border bg-background p-6 shadow-[var(--shadow-md)] max-h-[calc(100dvh-2rem)] overflow-y-auto scrollbar-visible data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-98 data-[state=open]:zoom-in-98 sm:rounded-xl",
         className
       )}
       {...props}
@@ -84,6 +93,32 @@ const DialogVeil = () => (
   </DialogPortal>
 )
 
+// Ref-counted so overlapping non-modal dialogs (e.g. the template picker
+// closing in the same commit as the booking dialog opens) cannot fight over
+// the flag: the shell stays inert until the LAST open dialog releases it.
+let dashShellInertCount = 0
+
+/**
+ * Hand-rolled page modality for `modal={false}` dialogs. Radix non-modal mode
+ * drops the focus trap, aria-hiding, and body pointer-events lock, so the
+ * page behind the DialogVeil would stay keyboard/AT/tap-reachable. `inert` on
+ * the dash shell blocks all of that while the agent sheet and its trigger
+ * (both outside the shell) stay live. Pair with DialogVeil.
+ */
+const useDashShellInert = (open: boolean) => {
+  React.useEffect(() => {
+    if (!open) return
+    const shell = document.getElementById('dash-shell')
+    if (!shell) return
+    dashShellInertCount++
+    shell.inert = true
+    return () => {
+      dashShellInertCount--
+      if (dashShellInertCount <= 0) shell.inert = false
+    }
+  }, [open])
+}
+
 const DialogHeader = ({
   className,
   ...props
@@ -151,6 +186,7 @@ export {
   DialogTrigger,
   DialogContent,
   DialogVeil,
+  useDashShellInert,
   DialogHeader,
   DialogFooter,
   DialogTitle,