Refactor contact handling and other improvments (#317)

* Refactor contact filtering and improve localization strings; enhance path trace handling

* Add localization for new CLI commands and update existing strings

* Enhance contact handling and UI updates across multiple screens
add unfiltered contact access and improve last seen resolution

* Add polling interval configuration and improve contact handling

* Reorder command constants for better organization and clarity

* Refactor contact handling by removing unnecessary mapping and improving clarity across multiple screens

* Moved RadioStatsIconButton in chat screen for improved UI consistency

* Added indicators to AppBar for channels

* Ignore contacts with self public key in contact handling

* Simplify path removal logic and clean up unused imports in path management dialog

* Enhance path hop resolution by adding distance checks to improve candidate selection accuracy

* Remove unnecessary reset of radio stats poll reference count in polling interval setter

lib/screens/channel_message_path_screen.dart

@@ -879,7 +879,7 @@ List<_PathHop> _buildPathHops(
       previousPosition = resolvedPosition;
     }
     // If the best candidate is much farther than the previous hop, it's likely not the correct match.
-    if (lastDistance + bestDistance > 50000 &&
+    if (lastDistance + bestDistance > 70000 &&
         candidates != null &&
         candidates.isNotEmpty) {
       i--;