change app name, add route calculator

lib/components/calculator/routeSummaryWidget.dart

@@ -0,0 +1,73 @@
+import 'package:flutter/material.dart';
+
+class RouteSummaryWidget extends StatelessWidget {
+  final double distance;
+  final VoidCallback onDetailsPressed;
+
+  const RouteSummaryWidget({
+    super.key,
+    required this.distance,
+    required this.onDetailsPressed,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return Padding(
+      padding: const EdgeInsets.all(16),
+      child: Row(
+        children: [
+          Expanded(
+            child: Text(
+              "Total Distance: ${distance.toStringAsFixed(2)} mi",
+              style: Theme.of(context).textTheme.titleMedium,
+            ),
+          ),
+          TextButton(
+            onPressed: onDetailsPressed,
+            child: const Text("View Details"),
+          ),
+        ],
+      ),
+    );
+  }
+}
+
+class RouteDetailsView extends StatelessWidget {
+  final List<String> route;
+  final List<double> costs;
+  final VoidCallback onBack;
+
+  const RouteDetailsView({
+    super.key,
+    required this.route,
+    required this.costs,
+    required this.onBack,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return Column(
+      children: [
+        Align(
+          alignment: Alignment.centerLeft,
+          child: TextButton.icon(
+            onPressed: onBack,
+            icon: const Icon(Icons.arrow_back),
+            label: const Text('Back'),
+          ),
+        ),
+        Expanded(
+          child: ListView.builder(
+            itemCount: route.length,
+            itemBuilder: (context, index) {
+              return ListTile(
+                title: Text(route[index]),
+                trailing: Text("${costs[index].toStringAsFixed(2)} mi"),
+              );
+            },
+          ),
+        ),
+      ],
+    );
+  }
+}