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/models/path_history.dart

@@ -1,11 +1,12 @@
 class PathRecord {
   final int hopCount;
   final int tripTimeMs;
-  final DateTime timestamp;
+  final DateTime? timestamp;
   final bool wasFloodDiscovery;
   final List<int> pathBytes;
   final int successCount;
   final int failureCount;
+  final double routeWeight;
 
   PathRecord({
     required this.hopCount,
@@ -15,6 +16,7 @@ class PathRecord {
     required this.pathBytes,
     required this.successCount,
     required this.failureCount,
+    this.routeWeight = 1.0,
   });
 
   String get displayText =>
@@ -24,11 +26,12 @@ class PathRecord {
     return {
       'hop_count': hopCount,
       'trip_time_ms': tripTimeMs,
-      'timestamp': timestamp.toIso8601String(),
+      'timestamp': timestamp?.toIso8601String(),
       'was_flood': wasFloodDiscovery,
       'path_bytes': pathBytes,
       'success_count': successCount,
       'failure_count': failureCount,
+      'route_weight': routeWeight,
     };
   }
 
@@ -36,12 +39,15 @@ class PathRecord {
     return PathRecord(
       hopCount: json['hop_count'] as int,
       tripTimeMs: json['trip_time_ms'] as int,
-      timestamp: DateTime.parse(json['timestamp'] as String),
+      timestamp: json['timestamp'] != null
+          ? DateTime.parse(json['timestamp'] as String)
+          : null,
       wasFloodDiscovery: json['was_flood'] as bool,
       pathBytes:
           (json['path_bytes'] as List?)?.map((b) => b as int).toList() ?? [],
       successCount: json['success_count'] as int? ?? 0,
       failureCount: json['failure_count'] as int? ?? 0,
+      routeWeight: (json['route_weight'] as num?)?.toDouble() ?? 1.0,
     );
   }
 }