pos changes

lib/presentation/sync/widgets/sign_out_dialog.dart

@@ -10,6 +10,7 @@ import '../../../core/widgets/primary_button.dart';
 import '../../auth/providers/auth_controller.dart';
 import '../../pos/providers/cart_controller.dart';
 import '../../pos/providers/catalog_providers.dart';
+import '../../pos/providers/navigation_provider.dart';
 import '../../../domain/repositories/sync_repository.dart';
 import '../providers/sync_controller.dart';
 
@@ -38,21 +39,52 @@ class _SignOutDialogState extends ConsumerState<_SignOutDialog> {
 
   Future<void> _finish() async {
     ref.read(cartControllerProvider.notifier).reset();
+
+    // Read before signing out — the session that decides this is gone by the
+    // time signOut returns.
+    final cleared =
+        ref.read(authControllerProvider.notifier).clearsCatalogueOnSignOut;
+
     await ref.read(authControllerProvider.notifier).signOut();
 
-    // Mirrors what a successful import does on the way in: bump the version
-    // so catalogueReadyProvider re-reads hasCatalogue as false, and drop the
-    // cached product lists so the next session's grid doesn't flash this
-    // session's now-cleared data before it re-fetches.
+    // Mirrors what a successful import does on the way in: bump the version so
+    // catalogueReadyProvider re-reads hasCatalogue, and drop the cached product
+    // lists so the next session's grid doesn't flash this session's data before
+    // it re-fetches.
+    //
+    // Run either way. After an admin sign-out the catalogue is still there and
+    // these simply re-read it — which is the point: the next session must see
+    // what is on disk now, not what this one had in memory.
     ref.read(catalogueVersionProvider.notifier).state++;
     ref.invalidate(allProductsProvider);
     ref.invalidate(visibleProductsProvider);
     ref.invalidate(categoryCountsProvider);
     ref.invalidate(lowStockProductsProvider);
 
+    // The next session starts on the till, never wherever this one left off.
+    ref.read(activeModuleProvider.notifier).state = PosModule.pos;
+    ref.read(searchQueryProvider.notifier).state = '';
+    ref.read(selectedCategoryProvider.notifier).state = null;
+
     if (!mounted) return;
+
+    // Resolved while this context is still mounted. The messenger itself lives
+    // above the router, so the bar survives the route change below.
+    final messenger = ScaffoldMessenger.of(context);
+
     Navigator.of(context).pop();
     context.go(AppRoutes.login);
+
+    if (cleared) {
+      messenger
+        ..hideCurrentSnackBar()
+        ..showSnackBar(const SnackBar(
+          content: Text(
+            'Signed out. The product catalogue has been removed from this '
+            'terminal.',
+          ),
+        ),);
+    }
   }
 
   Future<void> _pushThenFinish() async {
@@ -76,8 +108,10 @@ class _SignOutDialogState extends ConsumerState<_SignOutDialog> {
     final pushing = ref.watch(orderSyncProvider) is SyncRunning;
     final failed = _result != null && !_result!.isSuccess;
 
+    final cashier = ref.watch(isCashierModeProvider);
+
     return AlertDialog(
-      title: const Text('End shift'),
+      title: Text(cashier ? 'End shift' : 'Sign out'),
       contentPadding: const EdgeInsets.fromLTRB(
         AppSpacing.xxl,
         AppSpacing.lg,
@@ -92,6 +126,26 @@ class _SignOutDialogState extends ConsumerState<_SignOutDialog> {
             mainAxisSize: MainAxisSize.min,
             crossAxisAlignment: CrossAxisAlignment.stretch,
             children: [
+              // What happens to the products is the difference between the two
+              // sign-outs, so it is said plainly rather than left to be
+              // discovered at the next login.
+              _Banner(
+                icon: cashier
+                    ? Icons.delete_sweep_outlined
+                    : Icons.inventory_2_outlined,
+                color: cashier ? AppColors.warning : AppColors.info,
+                background: cashier
+                    ? AppColors.warningSurface
+                    : AppColors.infoSurface,
+                message: cashier
+                    ? 'The product catalogue will be removed from this '
+                        'terminal. An admin imports it again for the next '
+                        'shift.'
+                    : 'The imported products stay on this terminal, so a '
+                        'cashier can sign in and start billing without a '
+                        'connection.',
+              ),
+
               if (cart.isNotEmpty)
                 _Banner(
                   icon: Icons.warning_amber_rounded,