updated ui added new features

lib/models/message.dart

@@ -10,6 +10,10 @@ class Message {
   final bool isOutgoing;
   final bool isCli;
   final MessageStatus status;
+  final bool isVoice;
+  final String? voicePath;
+  final int? voiceDurationMs;
+  final String? voiceCodec;
 
   // NEW: Retry logic fields
   final String? messageId;
@@ -30,6 +34,10 @@ class Message {
     required this.isOutgoing,
     this.isCli = false,
     this.status = MessageStatus.pending,
+    this.isVoice = false,
+    this.voicePath,
+    this.voiceDurationMs,
+    this.voiceCodec,
     this.messageId,
     this.retryCount = 0,
     this.estimatedTimeoutMs,
@@ -55,6 +63,10 @@ class Message {
     int? pathLength,
     Uint8List? pathBytes,
     bool? isCli,
+    bool? isVoice,
+    String? voicePath,
+    int? voiceDurationMs,
+    String? voiceCodec,
   }) {
     return Message(
       senderKey: senderKey,
@@ -63,6 +75,10 @@ class Message {
       isOutgoing: isOutgoing,
       isCli: isCli ?? this.isCli,
       status: status ?? this.status,
+      isVoice: isVoice ?? this.isVoice,
+      voicePath: voicePath ?? this.voicePath,
+      voiceDurationMs: voiceDurationMs ?? this.voiceDurationMs,
+      voiceCodec: voiceCodec ?? this.voiceCodec,
       messageId: messageId,
       retryCount: retryCount ?? this.retryCount,
       estimatedTimeoutMs: estimatedTimeoutMs ?? this.estimatedTimeoutMs,
@@ -101,6 +117,7 @@ class Message {
       isOutgoing: false,
       isCli: false,
       status: MessageStatus.delivered,
+      isVoice: false,
       pathBytes: Uint8List(0),
     );
   }
@@ -118,6 +135,7 @@ class Message {
       isOutgoing: true,
       isCli: false,
       status: MessageStatus.pending,
+      isVoice: false,
       pathLength: pathLength,
       pathBytes: pathBytes,
     );