Empty state for Recipient Adress Book

frontend/pweb/lib/pages/address_book/page/empty.dart

@@ -0,0 +1,37 @@
+
+import 'package:flutter/material.dart';
+
+
+class RecipientAddressBookEmptyState extends StatelessWidget {
+  final String message;
+  final String actionLabel;
+  final VoidCallback onAction;
+
+  const RecipientAddressBookEmptyState({
+    required this.message,
+    required this.actionLabel,
+    required this.onAction,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    final textTheme = Theme.of(context).textTheme;
+
+    return Center(
+      child: Column(
+        mainAxisSize: MainAxisSize.min,
+        children: [
+          const Icon(Icons.contact_mail_outlined, size: 42),
+          const SizedBox(height: 12),
+          Text(message, style: textTheme.titleMedium),
+          const SizedBox(height: 12),
+          OutlinedButton.icon(
+            onPressed: onAction,
+            icon: const Icon(Icons.add),
+            label: Text(actionLabel),
+          ),
+        ],
+      ),
+    );
+  }
+}

frontend/pweb/lib/pages/address_book/page/page.dart

@@ -5,6 +5,7 @@ import 'package:provider/provider.dart';
 import 'package:pshared/models/recipient/recipient.dart';
 import 'package:pshared/models/recipient/filter.dart';
 import 'package:pshared/provider/recipient/provider.dart';
+import 'package:pweb/pages/address_book/page/empty.dart';
 
 import 'package:pweb/pages/address_book/page/filter_button.dart';
 import 'package:pweb/pages/address_book/page/header.dart';
@@ -72,6 +73,7 @@ class _RecipientAddressBookPageState extends State<RecipientAddressBookPage> {
     final loc = AppLocalizations.of(context)!;
     final provider = context.watch<RecipientsProvider>(); 
     _syncSearchField(provider);
+    final filteredRecipients = provider.filteredRecipients;
 
     if (provider.isLoading) {
       return const Center(child: CircularProgressIndicator());
@@ -124,15 +126,23 @@ class _RecipientAddressBookPageState extends State<RecipientAddressBookPage> {
           height: RecipientAddressBookPage._expandedHeight,
           child: Padding(
             padding: const EdgeInsets.all(RecipientAddressBookPage._paddingAll),
-            child: RecipientAddressBookList(
-              filteredRecipients: provider.filteredRecipients,
-              onEdit: (recipient) => widget.onEditRecipient?.call(recipient),
-              onDelete: (recipient) => widget.onDeleteRecipient?.call(recipient),
-              onSelected: widget.onRecipientSelected,
-            ),
+            child: provider.recipients.isEmpty
+              ? RecipientAddressBookEmptyState(
+                  message: loc.noRecipientsYet,
+                  actionLabel: loc.addRecipient,
+                  onAction: widget.onAddRecipient,
+                )
+              : filteredRecipients.isEmpty
+                ? Center(child: Text(loc.noRecipientsFound))
+                : RecipientAddressBookList(
+                    filteredRecipients: filteredRecipients,
+                    onEdit: (recipient) => widget.onEditRecipient?.call(recipient),
+                    onDelete: (recipient) => widget.onDeleteRecipient?.call(recipient),
+                    onSelected: widget.onRecipientSelected,
+                  ),
           ),
         ),
       ],
     );
   }
-}
+}