Fix contacts search to include name and handle not just name and make case insensitive.

lib/screens/contacts_screen.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:go_router/go_router.dart';
+import 'package:logging/logging.dart';
 import 'package:provider/provider.dart';
 
 import '../controls/app_bottom_nav_bar.dart';
@@ -13,17 +14,24 @@ class ContactsScreen extends StatefulWidget {
 }
 
 class _ContactsScreenState extends State<ContactsScreen> {
+  static final _logger = Logger('$ContactsScreen');
   var filterText = '';
 
   @override
   Widget build(BuildContext context) {
     final manager = context.watch<ConnectionsManager>();
-    final contacts = manager
-        .getMyContacts()
+    final allContacts = manager.getMyContacts();
+    final filterTextLC = filterText.toLowerCase();
+    final contacts = allContacts
         .where((c) =>
-            filterText.isEmpty || c.name.toLowerCase().contains(filterText))
+            filterText.isEmpty ||
+            c.name.toLowerCase().contains(filterTextLC) ||
+            c.handle.toLowerCase().contains(filterTextLC))
         .toList();
     contacts.sort((c1, c2) => c1.name.compareTo(c2.name));
+    _logger.finer(
+      () => '# Contacts: ${allContacts.length}, #filtered: ${contacts.length}',
+    );
     late Widget body;
     if (contacts.isEmpty) {
       body = const SingleChildScrollView(