chore(wip): upgrade dependencies, begin refactor

frontend/lib/old/modules/step_between_landmarks.dart

@@ -0,0 +1,70 @@
+import 'package:flutter/material.dart';
+
+import 'package:anyway/structs/landmark.dart';
+import 'package:anyway/modules/map_chooser.dart';
+
+
+class StepBetweenLandmarks extends StatefulWidget {
+  final Landmark current;
+  final Landmark next;
+
+  const StepBetweenLandmarks({
+    super.key,
+    required this.current,
+    required this.next
+    });
+
+  @override
+  State<StepBetweenLandmarks> createState() => _StepBetweenLandmarksState();
+}
+
+class _StepBetweenLandmarksState extends State<StepBetweenLandmarks> {
+  @override
+  Widget build(BuildContext context) {
+    int? time = widget.current.tripTime?.inMinutes;
+    
+    // since landmarks might have been marked as visited, the next landmark might not be the immediate next in the list
+    // => the precomputed trip time is not valid anymore
+    if (widget.current.next != widget.next) {
+      time = null;
+    }
+    
+    // round 0 travel time to 1 minute
+    if (time != null && time < 1) {
+      time = 1;
+    }
+
+    return Container(
+      margin: const EdgeInsets.all(10),
+      padding: const EdgeInsets.all(10),
+      decoration: const BoxDecoration(
+        border: Border(
+          left: BorderSide(width: 3.0, color: Colors.black),
+        ),
+      ),
+      child: Row( 
+        children: [
+          Column(
+            children: [
+              const Icon(Icons.directions_walk),
+              Text(
+                time == null ? "" : "$time min",
+                style: const TextStyle(fontSize: 10)
+              ),
+            ],
+          ),
+
+          const Spacer(),
+
+          ElevatedButton.icon(
+            onPressed: () async {
+              showMapChooser(context, widget.current, widget.next);
+            },
+            icon: const Icon(Icons.directions),
+            label: const Text("Directions"),
+          )
+        ],
+      ),
+    );
+  }
+}