Refactor Cayenne LPP parsing with error handling and logging

- Added error handling and logging to the Cayenne LPP parsing methods to manage malformed data gracefully.
- Improved the structure of the parsing logic for better readability and maintainability.
- Updated the Contact model to include error handling during frame parsing.
- Refactored Channels, Contacts, Map, and Neighbours screens to utilize a new AppBarTitle widget for consistent app bar design.
- Enhanced the BatteryIndicator widget to display SNR information for direct repeaters.
- Introduced SNRUi class for better management of SNR icon and text representation.
- Improved error handling in PathTraceMap and Neighbours screens to log errors appropriately.

lib/widgets/app_bar.dart

@@ -0,0 +1,46 @@
+import 'package:flutter/material.dart';
+import 'package:meshcore_open/connector/meshcore_connector.dart';
+import 'package:meshcore_open/widgets/battery_indicator.dart';
+import 'package:provider/provider.dart';
+
+class AppBarTitle extends StatelessWidget {
+  final String title;
+  final TextStyle? style;
+  final Widget? leading;
+  final Widget? trailing;
+  const AppBarTitle(
+    this.title,
+    this.style, {
+    this.leading,
+    this.trailing,
+    super.key,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    final connector = context.watch<MeshCoreConnector>();
+
+    return Row(
+      mainAxisAlignment: MainAxisAlignment.start,
+      children: [
+        Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            if (leading != null) leading!,
+            Text(title),
+            if (connector.isConnected && connector.selfName != null)
+              Center(
+                child: Text(
+                  '(${connector.selfName})',
+                  style: TextStyle(fontSize: 14, color: Colors.grey[600]),
+                ),
+              ),
+          ],
+        ),
+        const SizedBox(width: 8),
+        BatteryIndicator(connector: connector),
+        if (trailing != null) trailing!,
+      ],
+    );
+  }
+}

lib/widgets/battery_indicator.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'package:meshcore_open/widgets/snr_indicator.dart';
 
 import '../connector/meshcore_connector.dart';
 
@@ -42,6 +43,7 @@ class _BatteryIndicatorState extends State<BatteryIndicator> {
   Widget build(BuildContext context) {
     final percent = widget.connector.batteryPercent;
     final millivolts = widget.connector.batteryMillivolts;
+    final directRepeaters = widget.connector.directRepeaters;
 
     if (millivolts == null) {
       return const SizedBox.shrink();
@@ -55,6 +57,20 @@ class _BatteryIndicatorState extends State<BatteryIndicator> {
     }
 
     final batteryUi = batteryUiForPercent(percent);
+    final directBestRepeaters = List.of(directRepeaters)
+      ..sort((a, b) {
+        final dateCompare = b.lastUpdated.compareTo(a.lastUpdated);
+        if (dateCompare != 0) return dateCompare;
+        return (b.snr).compareTo(a.snr);
+      });
+    final directRepeater = directBestRepeaters.isEmpty
+        ? null
+        : directBestRepeaters.first;
+
+    final snrUi = snrUiFromSNR(
+      directBestRepeaters.isNotEmpty ? directRepeater!.snr : null,
+      widget.connector.currentSf,
+    );
 
     return InkWell(
       onTap: () {
@@ -68,19 +84,53 @@ class _BatteryIndicatorState extends State<BatteryIndicator> {
         child: Row(
           mainAxisSize: MainAxisSize.min,
           children: [
-            Icon(batteryUi.icon, size: 18, color: batteryUi.color),
-            const SizedBox(width: 2),
-            Flexible(
-              child: Text(
-                displayText,
-                style: TextStyle(
-                  fontSize: 12,
-                  fontWeight: FontWeight.w500,
-                  color: batteryUi.color,
+            Column(
+              mainAxisSize: MainAxisSize.min,
+              children: [
+                Icon(batteryUi.icon, size: 18, color: batteryUi.color),
+                const SizedBox(width: 2),
+                Flexible(
+                  child: Text(
+                    displayText,
+                    style: TextStyle(
+                      fontSize: 12,
+                      fontWeight: FontWeight.w500,
+                      color: batteryUi.color,
+                    ),
+                    maxLines: 1,
+                    overflow: TextOverflow.ellipsis,
+                  ),
                 ),
-                overflow: TextOverflow.visible,
-                maxLines: 1,
-                softWrap: false,
+              ],
+            ),
+            const SizedBox(width: 8),
+            Padding(
+              padding: const EdgeInsets.only(top: 2),
+              child: Column(
+                mainAxisSize: MainAxisSize.min,
+                children: [
+                  Column(
+                    mainAxisSize: MainAxisSize.min,
+                    children: [
+                      Icon(snrUi.icon, size: 18, color: snrUi.color),
+                      Text(
+                        snrUi.text,
+                        style: TextStyle(fontSize: 12, color: snrUi.color),
+                      ),
+                    ],
+                  ),
+                  if (directRepeater != null)
+                    Text(
+                      '${directRepeaters.length}: ${directRepeater.pubkeyFirstByte.toRadixString(16).padLeft(2, '0')}: ${_formatLastUpdated(directRepeater.lastUpdated)}',
+                      style: TextStyle(
+                        fontSize: 12,
+                        fontWeight: FontWeight.w500,
+                        color: Colors.grey,
+                      ),
+                      maxLines: 1,
+                      overflow: TextOverflow.ellipsis,
+                    ),
+                ],
               ),
             ),
           ],
@@ -88,4 +138,22 @@ class _BatteryIndicatorState extends State<BatteryIndicator> {
       ),
     );
   }
+
+  String _formatLastUpdated(DateTime lastSeen) {
+    final now = DateTime.now();
+    final diff = now.difference(lastSeen);
+
+    if (diff.isNegative || diff.inMinutes < 1) {
+      return "${diff.inSeconds}s";
+    }
+    if (diff.inMinutes < 60) {
+      return "${diff.inMinutes}m";
+    }
+    if (diff.inHours < 24) {
+      final hours = diff.inHours;
+      return hours == 1 ? "1h" : "${hours}hs";
+    }
+    final days = diff.inDays;
+    return days == 1 ? "1d" : "${days}ds";
+  }
 }

lib/widgets/snr_indicator.dart

@@ -1,5 +1,12 @@
 import 'package:flutter/material.dart';
 
+class SNRUi {
+  final IconData icon;
+  final Color color;
+  final String text;
+  const SNRUi(this.icon, this.color, this.text);
+}
+
 List<double> getSNRfromSF(int spreadingFactor) {
   switch (spreadingFactor) {
     case 7:
@@ -19,44 +26,33 @@ List<double> getSNRfromSF(int spreadingFactor) {
   }
 }
 
-class SNRIcon extends StatelessWidget {
-  final double snr;
-  final List<double> snrLevels;
-
-  const SNRIcon({
-    super.key,
-    required this.snr,
-    this.snrLevels = const [4.0, -2.0, -4.0, -6.0],
-  });
-
-  @override
-  Widget build(BuildContext context) {
-    IconData icon;
-    Color color;
-
-    if (snr >= snrLevels[0]) {
-      icon = Icons.signal_cellular_alt;
-      color = Colors.green;
-    } else if (snr >= snrLevels[1]) {
-      icon = Icons.signal_cellular_alt;
-      color = Colors.lightGreen;
-    } else if (snr >= snrLevels[2]) {
-      icon = Icons.signal_cellular_alt;
-      color = Colors.yellow;
-    } else if (snr >= snrLevels[3]) {
-      icon = Icons.signal_cellular_alt_2_bar;
-      color = Colors.orange;
-    } else {
-      icon = Icons.signal_cellular_alt_1_bar;
-      color = Colors.red;
-    }
-
-    return Column(
-      mainAxisAlignment: MainAxisAlignment.center,
-      children: [
-        Icon(icon, color: color),
-        Text('$snr dB', style: TextStyle(fontSize: 10, color: color)),
-      ],
-    );
+SNRUi snrUiFromSNR(double? snr, int? spreadingFactor) {
+  if (snr == null || spreadingFactor == null) {
+    return const SNRUi(Icons.signal_cellular_off, Colors.grey, '—');
   }
+
+  final snrLevels = getSNRfromSF(spreadingFactor);
+
+  IconData icon;
+  Color color;
+  String text = '${snr.toStringAsFixed(1)} dB';
+
+  if (snr >= snrLevels[0]) {
+    icon = Icons.signal_cellular_alt;
+    color = Colors.green;
+  } else if (snr >= snrLevels[1]) {
+    icon = Icons.signal_cellular_alt;
+    color = Colors.lightGreen;
+  } else if (snr >= snrLevels[2]) {
+    icon = Icons.signal_cellular_alt;
+    color = Colors.yellow;
+  } else if (snr >= snrLevels[3]) {
+    icon = Icons.signal_cellular_alt_2_bar;
+    color = Colors.orange;
+  } else {
+    icon = Icons.signal_cellular_alt_1_bar;
+    color = Colors.red;
+  }
+
+  return SNRUi(icon, color, text);
 }