Msg Retry fixes, channel message fixes. Notification fixes. Make more desktop friendly. Enhance retry algo. Fix predicted location clustering add retries to reactions and fix the reactions in private DMS centralize and cleanup code in var areas

lib/screens/discovery_screen.dart

@@ -9,6 +9,7 @@ import '../connector/meshcore_protocol.dart';
 import '../l10n/l10n.dart';
 import '../models/contact.dart';
 import '../utils/contact_search.dart';
+import '../utils/platform_info.dart';
 import '../widgets/app_bar.dart';
 import '../widgets/list_filter_widget.dart';
 
@@ -88,7 +89,7 @@ class _DiscoveryScreenState extends State<DiscoveryScreen> {
                     itemCount: filteredAndSorted.length,
                     itemBuilder: (context, index) {
                       final contact = filteredAndSorted[index];
-                      return ListTile(
+                      final tile = ListTile(
                         leading: CircleAvatar(
                           backgroundColor: _getTypeColor(contact.type),
                           child: Icon(
@@ -120,6 +121,14 @@ class _DiscoveryScreenState extends State<DiscoveryScreen> {
                         onLongPress: () =>
                             _showContactContextMenu(contact, connector),
                       );
+                      if (PlatformInfo.isDesktop) {
+                        return GestureDetector(
+                          onSecondaryTapUp: (_) =>
+                              _showContactContextMenu(contact, connector),
+                          child: tile,
+                        );
+                      }
+                      return tile;
                     },
                   ),
           ),