feat(dialogs): gedeelde primitives — useDirtyCloseGuard, useDialogSubmitShortcut, layout-classes

Story 1 van PBI "Alle dialogen conform docs/patterns/dialog.md".

- components/shared/use-dirty-close-guard.tsx — hook + paired AlertDialog
- components/shared/use-dialog-submit-shortcut.ts — Cmd/Ctrl+Enter handler
- components/shared/entity-dialog-layout.ts — MD3-conforme classes voor §4
- TaskDialog refactored om beide hooks + classes te gebruiken (geen
  gedragsverandering)
- 8 nieuwe unit-tests

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

components/shared/entity-dialog-layout.ts

@@ -0,0 +1,16 @@
+import { cn } from '@/lib/utils'
+
+export const entityDialogContentClasses = cn(
+  'flex flex-col p-0 gap-0',
+  'max-h-[90vh] w-full max-w-[calc(100%-2rem)]',
+  'sm:max-w-[90vw] sm:max-h-[85vh]',
+  'lg:max-w-[50vw] lg:min-w-[480px]',
+)
+
+export const entityDialogHeaderClasses =
+  'flex items-center justify-between px-6 pt-5 pb-4 border-b border-outline-variant shrink-0'
+
+export const entityDialogBodyClasses = 'flex-1 overflow-y-auto px-6 py-6 space-y-6'
+
+export const entityDialogFooterClasses =
+  'border-t border-outline-variant px-6 py-4 shrink-0'

components/shared/use-dialog-submit-shortcut.ts

@@ -0,0 +1,10 @@
+import type { KeyboardEvent } from 'react'
+
+export function useDialogSubmitShortcut(submit: () => void) {
+  return (e: KeyboardEvent) => {
+    if ((e.metaKey || e.ctrlKey) && e.key === 'Enter') {
+      e.preventDefault()
+      submit()
+    }
+  }
+}

components/shared/use-dirty-close-guard.tsx

@@ -0,0 +1,66 @@
+'use client'
+
+import { useState } from 'react'
+import {
+  AlertDialog,
+  AlertDialogAction,
+  AlertDialogCancel,
+  AlertDialogContent,
+  AlertDialogDescription,
+  AlertDialogFooter,
+  AlertDialogHeader,
+  AlertDialogTitle,
+} from '@/components/ui/alert-dialog'
+
+export interface DirtyCloseGuard {
+  confirmOpen: boolean
+  setConfirmOpen: (v: boolean) => void
+  attemptClose: () => void
+  confirmDiscard: () => void
+}
+
+export function useDirtyCloseGuard(
+  isDirty: boolean,
+  onClose: () => void,
+): DirtyCloseGuard {
+  const [confirmOpen, setConfirmOpen] = useState(false)
+
+  function attemptClose() {
+    if (isDirty) setConfirmOpen(true)
+    else onClose()
+  }
+
+  function confirmDiscard() {
+    setConfirmOpen(false)
+    onClose()
+  }
+
+  return { confirmOpen, setConfirmOpen, attemptClose, confirmDiscard }
+}
+
+export function DirtyCloseGuardDialog({
+  guard,
+}: {
+  guard: DirtyCloseGuard
+}) {
+  return (
+    <AlertDialog open={guard.confirmOpen} onOpenChange={guard.setConfirmOpen}>
+      <AlertDialogContent size="sm">
+        <AlertDialogHeader>
+          <AlertDialogTitle>Wijzigingen niet opgeslagen</AlertDialogTitle>
+          <AlertDialogDescription>
+            Wil je de wijzigingen weggooien?
+          </AlertDialogDescription>
+        </AlertDialogHeader>
+        <AlertDialogFooter>
+          <AlertDialogCancel onClick={() => guard.setConfirmOpen(false)}>
+            Terug
+          </AlertDialogCancel>
+          <AlertDialogAction variant="destructive" onClick={guard.confirmDiscard}>
+            Weggooien
+          </AlertDialogAction>
+        </AlertDialogFooter>
+      </AlertDialogContent>
+    </AlertDialog>
+  )
+}