feat(ui): replace native confirm() with DaisyUI modal composable (F7.2)

Create useConfirm composable (promise-based, singleton state) and
ConfirmModal component. Replace all 10 confirm()/window.confirm() calls
across 9 pages and 1 composable.

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

app/pages/machine-skeleton/index.vue

@@ -108,7 +108,7 @@ import IconLucidePackage from "~icons/lucide/package";
 import IconLucideLayoutGrid from "~icons/lucide/layout-grid";
 import IconLucideBox from "~icons/lucide/box";
 
-const { machineTypes, loading, loadMachineTypes, deleteMachineType } =
+const { machineTypes, loadMachineTypes, deleteMachineType } =
   useMachineTypesApi();
 
 const categories = ref([
@@ -131,13 +131,15 @@ const filteredTypes = computed(() => {
   );
 });
 
+const { confirm: confirmDialog } = useConfirm();
+
 const confirmDeleteType = async (type) => {
   const { showError, showSuccess } = useToast();
 
   if (
-    confirm(
-      `Êtes-vous sûr de vouloir supprimer le type "${type.name}" ? Cette action est irréversible.`
-    )
+    await confirmDialog({
+      message: `Êtes-vous sûr de vouloir supprimer le type "${type.name}" ? Cette action est irréversible.`,
+    })
   ) {
     try {
       const result = await deleteMachineType(type.id);