fix: retain voice codec settings now

ref:

lib/utils/message_extensions.dart

@@ -10,12 +10,15 @@ extension MessageLocalization on Message {
 
     // For channel messages, show echo count instead of delivery status
     if (isChannelMessage && deliveryStatus == MessageDeliveryStatus.sent) {
+      final latestMeta = _formatEchoMeta(context);
       if (echoCount == 0) {
         return l10n.broadcast; // "Broadcast (no echoes yet)"
       } else if (echoCount == 1) {
-        return 'Rebroadcast by 1 node';
+        return latestMeta == null ? '1 node' : '1 node • $latestMeta';
       } else {
-        return 'Rebroadcast by $echoCount nodes';
+        return latestMeta == null
+            ? '$echoCount nodes'
+            : '$echoCount nodes • $latestMeta';
       }
     }
 
@@ -46,4 +49,53 @@ extension MessageLocalization on Message {
     if (diff.inHours < 24) return l10n.hoursAgo(diff.inHours);
     return l10n.daysAgo(diff.inDays);
   }
+
+  String? _formatEchoMeta(BuildContext context) {
+    if (lastEchoSnrRaw == null &&
+        lastEchoRssiDbm == null &&
+        lastEchoAt == null) {
+      return null;
+    }
+
+    final parts = <String>[];
+    if (lastEchoRssiDbm != null) {
+      parts.add('R ${_barsForRssi(lastEchoRssiDbm!)} $lastEchoRssiDbm dBm');
+    }
+    if (lastEchoSnrRaw != null) {
+      final snrDb = lastEchoSnrRaw!.toSigned(8) / 4.0;
+      parts.add('S ${_barsForSnr(snrDb)} ${snrDb.toStringAsFixed(1)} dB');
+    }
+    if (lastEchoAt != null) {
+      final diff = DateTime.now().difference(lastEchoAt!);
+      final l10n = AppLocalizations.of(context)!;
+      if (diff.inMinutes < 1) {
+        parts.add(l10n.justNow);
+      } else if (diff.inMinutes < 60) {
+        parts.add(l10n.minutesAgo(diff.inMinutes));
+      } else if (diff.inHours < 24) {
+        parts.add(l10n.hoursAgo(diff.inHours));
+      } else {
+        parts.add(l10n.daysAgo(diff.inDays));
+      }
+    }
+
+    if (parts.isEmpty) return null;
+    return parts.join(' • ');
+  }
+
+  String _barsForRssi(int rssiDbm) {
+    // Approximate useful RSSI range: -120..-70 dBm
+    final score = ((rssiDbm + 120) / 10).round().clamp(0, 5);
+    return _asciiBars(score, 5);
+  }
+
+  String _barsForSnr(double snrDb) {
+    // Approximate useful SNR range: -5..+20 dB
+    final score = ((snrDb + 5.0) / 5.0).round().clamp(0, 5);
+    return _asciiBars(score, 5);
+  }
+
+  String _asciiBars(int filled, int total) {
+    return '[${'#' * filled}${'-' * (total - filled)}]';
+  }
 }