refactor(#155): phase 2 — panels staff sous widgets/dashboard/.

Déplace les panels/wizards/validation/common partagés hors de
widgets/admin/ ; ne conserve que AdminManagementWidget (variante A).

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/lib/widgets/dashboard/validation_am_wizard.dart

@@ -0,0 +1,29 @@
+import 'package:flutter/material.dart';
+import 'package:p_tits_pas/models/dossier_unifie.dart';
+import 'package:p_tits_pas/widgets/dashboard/am_dossier_wizard.dart';
+
+/// Wrapper historique (#107) — délègue à [AmDossierWizard.review].
+class ValidationAmWizard extends StatelessWidget {
+  final DossierAM dossier;
+  final VoidCallback onClose;
+  final VoidCallback onSuccess;
+  final void Function(int step, int total)? onStepChanged;
+
+  const ValidationAmWizard({
+    super.key,
+    required this.dossier,
+    required this.onClose,
+    required this.onSuccess,
+    this.onStepChanged,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return AmDossierWizard.review(
+      dossier: dossier,
+      onClose: onClose,
+      onSuccess: onSuccess,
+      onStepChanged: onStepChanged,
+    );
+  }
+}