feat: MeshCore SAR - Flutter BLE mesh radio companion app

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

lib/utils/toast_logger.dart

@@ -0,0 +1,37 @@
+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+import '../providers/messages_provider.dart';
+
+/// Toast logger utility - replaces SnackBar with system messages in the channels tab
+class ToastLogger {
+  /// Log an info message
+  static void info(BuildContext context, String message) {
+    _log(context, message, 'info');
+  }
+
+  /// Log a success message
+  static void success(BuildContext context, String message) {
+    _log(context, message, 'success');
+  }
+
+  /// Log a warning message
+  static void warning(BuildContext context, String message) {
+    _log(context, message, 'warning');
+  }
+
+  /// Log an error message
+  static void error(BuildContext context, String message) {
+    _log(context, message, 'error');
+  }
+
+  /// Internal method to log a system message
+  static void _log(BuildContext context, String message, String level) {
+    try {
+      final messagesProvider = context.read<MessagesProvider>();
+      messagesProvider.logSystemMessage(text: message, level: level);
+    } catch (e) {
+      // Fallback to print if provider is not available
+      debugPrint('[$level] $message');
+    }
+  }
+}