Fix incorrect speed display: convert m/s to km/h in UI and helpers

app/helpers/application_helper.rb

@@ -169,9 +169,9 @@ def speed_text_color(speed)
   end
 
   def point_speed(speed)
-    return speed if speed.to_i <= 0
-
-    speed * 3.6
+    return "–" if speed.nil? || speed.to_f <= 0
+    speed = speed.to_f
+    "#{(speed * 3.6).round(1)}"
   end
 
   def days_left(active_until)

app/javascript/maps/helpers.js

@@ -66,15 +66,18 @@ export function formatDate(timestamp, timezone) {
   return date.toLocaleString(locale, { timeZone: timezone });
 }
 
-export function formatSpeed(speedKmh, unit = 'km') {
+export function formatSpeed(speedMs, unit = 'km') {
+  const speedKmh = speedMs * 3.6;  // Convert m/s to km/h
+
   if (unit === 'km') {
     return `${Math.round(speedKmh)} km/h`;
   } else {
-    const speedMph = speedKmh * 0.621371; // Convert km/h to mph
+    const speedMph = speedKmh * 0.621371;
     return `${Math.round(speedMph)} mph`;
   }
 }
 
+
 export function haversineDistance(lat1, lon1, lat2, lon2, unit = 'km') {
   // Haversine formula to calculate the distance between two points
   const toRad = (x) => (x * Math.PI) / 180;

app/views/points/_point.html.erb

@@ -13,7 +13,7 @@
       }
     %>
   </td>
-  <td class='<%= speed_text_color(point.velocity) %>'><%= point.velocity %></td>
+  <td class='<%= speed_text_color(point.velocity) %>'><%= point_speed(point.velocity) %></td>
   <td><%= human_datetime_with_seconds(point.recorded_at) %></td>
   <td><%= point.lat %>, <%= point.lon %></td>
   <td></td>