updated ui added new features

lib/storage/channel_message_store.dart

@@ -65,6 +65,7 @@ class ChannelMessageStore {
       'repeatCount': msg.repeatCount,
       'pathLength': msg.pathLength,
       'pathBytes': base64Encode(msg.pathBytes),
+      'pathVariants': msg.pathVariants.map(base64Encode).toList(),
       'repeats': msg.repeats.map(_repeatToJson).toList(),
     };
   }
@@ -87,6 +88,9 @@ class ChannelMessageStore {
       pathBytes: json['pathBytes'] != null
           ? Uint8List.fromList(base64Decode(json['pathBytes'] as String))
           : Uint8List(0),
+      pathVariants: (json['pathVariants'] as List<dynamic>?)
+          ?.map((entry) => Uint8List.fromList(base64Decode(entry as String)))
+          .toList(),
       repeats: (json['repeats'] as List<dynamic>?)
               ?.map((entry) => _repeatFromJson(entry as Map<String, dynamic>))
               .toList() ??

lib/storage/contact_store.dart

@@ -37,10 +37,13 @@ class ContactStore {
       'latitude': contact.latitude,
       'longitude': contact.longitude,
       'lastSeen': contact.lastSeen.millisecondsSinceEpoch,
+      'lastMessageAt': contact.lastMessageAt.millisecondsSinceEpoch,
     };
   }
 
   Contact _fromJson(Map<String, dynamic> json) {
+    final lastSeenMs = json['lastSeen'] as int? ?? 0;
+    final lastMessageMs = json['lastMessageAt'] as int?;
     return Contact(
       publicKey: Uint8List.fromList(base64Decode(json['publicKey'] as String)),
       name: json['name'] as String? ?? 'Unknown',
@@ -51,7 +54,8 @@ class ContactStore {
           : Uint8List(0),
       latitude: (json['latitude'] as num?)?.toDouble(),
       longitude: (json['longitude'] as num?)?.toDouble(),
-      lastSeen: DateTime.fromMillisecondsSinceEpoch(json['lastSeen'] as int? ?? 0),
+      lastSeen: DateTime.fromMillisecondsSinceEpoch(lastSeenMs),
+      lastMessageAt: DateTime.fromMillisecondsSinceEpoch(lastMessageMs ?? lastSeenMs),
     );
   }
 }

lib/storage/message_store.dart

@@ -41,6 +41,10 @@ class MessageStore {
       'timestamp': msg.timestamp.millisecondsSinceEpoch,
       'isOutgoing': msg.isOutgoing,
       'isCli': msg.isCli,
+      'isVoice': msg.isVoice,
+      'voicePath': msg.voicePath,
+      'voiceDurationMs': msg.voiceDurationMs,
+      'voiceCodec': msg.voiceCodec,
       'status': msg.status.index,
       'messageId': msg.messageId,
       'retryCount': msg.retryCount,
@@ -65,6 +69,10 @@ class MessageStore {
       timestamp: DateTime.fromMillisecondsSinceEpoch(json['timestamp'] as int),
       isOutgoing: json['isOutgoing'] as bool,
       isCli: isCli,
+      isVoice: json['isVoice'] as bool? ?? false,
+      voicePath: json['voicePath'] as String?,
+      voiceDurationMs: json['voiceDurationMs'] as int?,
+      voiceCodec: json['voiceCodec'] as String?,
       status: MessageStatus.values[json['status'] as int],
       messageId: json['messageId'] as String?,
       retryCount: json['retryCount'] as int? ?? 0,