feat(hud): GPS speed metric renders on the HUD overlay

Phone GPS speed already rode the wire (HudState.gpsSpeedKmh with
gpsSource="PHONE") but the HUD threw it away and the overlay-metric enum had no
GPS_SPEED key, so a GPS speed element did nothing on the HUD. Add GPS_SPEED to
both StudioMetric copies (byte-identical key), a gpsSpeedKmh field on the phone
and HUD WheelData, map the phone GPS speed through the HUD adapter, and merge it
into the studio editor preview. No protocol bump - speed was already sent.
Localized the picker label across 18 locales.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GADLyChheAoMX9dQbRgRnH

Author: eried

app/src/main/java/com/eried/eucplanet/data/model/WheelData.kt

@@ -28,6 +28,10 @@ data class WheelData(
      *  or -1 when none is paired / no fresh sample. Merged in like the battery /
      *  lat / long above so an overlay or HUD element can show it. */
     val externalGpsSpeedKmh: Float = -1f,
+    /** Ground speed in km/h from the PHONE's fused GPS, or -1 when no fix.
+     *  Distinct from externalGpsSpeedKmh (a paired box); merged in like lat/long
+     *  so an overlay / HUD element can show the phone GPS speed. */
+    val gpsSpeedKmh: Float = -1f,
     /** Phone IMU acceleration magnitude in g, 0 for trips recorded before this. */
     val gForce: Float = 0f,
     /** Phone IMU lateral acceleration in g (+right). 0 for trips recorded before this. */

app/src/main/java/com/eried/eucplanet/ui/studio/OverlayStudioViewModel.kt

@@ -164,7 +164,10 @@ class OverlayStudioViewModel @Inject constructor(
         val extFresh = ext != null && System.currentTimeMillis() - ext.timestamp < 5_000L
         val extBattery = if (extFresh) (ext!!.batteryPercent ?: -1) else -1
         val extSpeed = if (extFresh) ext!!.speedKmh else -1f
-        val withGps = if (loc != null) data.copy(latitude = loc.latitude, longitude = loc.longitude) else data
+        val withGps = if (loc != null) data.copy(
+            latitude = loc.latitude, longitude = loc.longitude,
+            gpsSpeedKmh = if (loc.hasSpeed()) loc.speed * 3.6f else -1f
+        ) else data
         withGps.copy(externalGpsBatteryPercent = extBattery, externalGpsSpeedKmh = extSpeed)
     }.stateIn(viewModelScope, SharingStarted.Eagerly, WheelData())
 

app/src/main/java/com/eried/eucplanet/ui/studio/StudioMetric.kt

@@ -48,6 +48,7 @@ enum class StudioMetric(
     EXTERNAL_GPS_BATTERY("EXT_GPS_BATTERY", "Ext GPS battery", StudioMetricKind.PLAIN, "%", 0, 100f, { it.externalGpsBatteryPercent.toFloat() }),
     EXTERNAL_GPS_SPEED("EXT_GPS_SPEED", "Ext GPS speed", StudioMetricKind.SPEED, "", 1, 60f, { it.externalGpsSpeedKmh.coerceAtLeast(0f) }),
     TIRE_PRESSURE("TIRE_PRESSURE", "Tire pressure", StudioMetricKind.PRESSURE, "", 1, 50f, { it.tirePressureKpa }),
+    GPS_SPEED("GPS_SPEED", "GPS speed", StudioMetricKind.SPEED, "", 1, 60f, { it.gpsSpeedKmh.coerceAtLeast(0f) }),
     // A lat/lng pair shown as text (not a scalar), so it only makes sense on a
     // text value element. extract is a placeholder; formatted() renders the pair.
     GPS("GPS", "GPS coordinates", StudioMetricKind.PLAIN, "", 0, 1f, { 0f }, textOnly = true);
@@ -113,5 +114,6 @@ fun StudioMetric.displayName(): String = when (this) {
     StudioMetric.EXTERNAL_GPS_BATTERY -> stringResource(R.string.studio_metric_external_gps_battery)
     StudioMetric.EXTERNAL_GPS_SPEED -> stringResource(R.string.studio_metric_external_gps_speed)
     StudioMetric.TIRE_PRESSURE -> stringResource(R.string.studio_metric_tire_pressure)
+    StudioMetric.GPS_SPEED -> stringResource(R.string.studio_metric_gps_speed)
     StudioMetric.GPS -> stringResource(R.string.studio_metric_gps)
 }

app/src/main/res/values-b+es+419/strings.xml

@@ -1393,6 +1393,7 @@
     <string name="studio_metric_g_force">G-Force</string>
     <string name="studio_metric_external_gps_battery">Batería GPS ext.</string>
     <string name="studio_metric_external_gps_speed">Vel. GPS ext.</string>
+    <string name="studio_metric_gps_speed">Velocidad GPS</string>
     <string name="studio_metric_gps">Coordenadas GPS</string>
 
     <!-- Studio misc -->

app/src/main/res/values-da/strings.xml

@@ -1380,6 +1380,7 @@
     <string name="studio_metric_g_force">G-Force</string>
     <string name="studio_metric_external_gps_battery">Ekst. GPS-batteri</string>
     <string name="studio_metric_external_gps_speed">Ext. GPS-fart</string>
+    <string name="studio_metric_gps_speed">GPS-fart</string>
     <string name="studio_metric_gps">GPS-koordinater</string>
 
     <!-- Navigator -->

app/src/main/res/values-de/strings.xml

@@ -1391,6 +1391,7 @@
     <string name="studio_metric_g_force">G-Force</string>
     <string name="studio_metric_external_gps_battery">Ext. GPS-Akku</string>
     <string name="studio_metric_external_gps_speed">Ext. GPS-Tempo</string>
+    <string name="studio_metric_gps_speed">GPS-Tempo</string>
     <string name="studio_metric_gps">GPS-Koordinaten</string>
 
     <!-- Studio misc -->

app/src/main/res/values-es/strings.xml

@@ -1379,6 +1379,7 @@
     <string name="studio_metric_g_force">G-Force</string>
     <string name="studio_metric_external_gps_battery">Batería GPS ext.</string>
     <string name="studio_metric_external_gps_speed">Vel. GPS ext.</string>
+    <string name="studio_metric_gps_speed">Velocidad GPS</string>
     <string name="studio_metric_gps">Coordenadas GPS</string>
 
     <!-- Navigator -->

app/src/main/res/values-fr/strings.xml

@@ -1418,6 +1418,7 @@
     <string name="studio_metric_g_force">G-Force</string>
     <string name="studio_metric_external_gps_battery">Batterie GPS ext.</string>
     <string name="studio_metric_external_gps_speed">Vitesse GPS ext.</string>
+    <string name="studio_metric_gps_speed">Vitesse GPS</string>
     <string name="studio_metric_gps">Coordonnées GPS</string>
 
     <!-- Studio: overwrite preset -->

app/src/main/res/values-it/strings.xml

@@ -935,6 +935,7 @@
     <string name="studio_metric_g_force">G-Force</string>
     <string name="studio_metric_external_gps_battery">Batteria GPS est.</string>
     <string name="studio_metric_external_gps_speed">Vel. GPS est.</string>
+    <string name="studio_metric_gps_speed">Velocità GPS</string>
     <string name="studio_metric_gps">Coordinate GPS</string>
     <string name="studio_metric_odometer">Contachilometri</string>
     <string name="studio_metric_pitch">Beccheggio</string>

app/src/main/res/values-ja/strings.xml

@@ -1376,6 +1376,7 @@
     <string name="studio_metric_g_force">G フォース</string>
     <string name="studio_metric_external_gps_battery">外部GPSバッテリー</string>
     <string name="studio_metric_external_gps_speed">外部GPS速度</string>
+    <string name="studio_metric_gps_speed">GPS速度</string>
     <string name="studio_metric_gps">GPS 座標</string>
 
     <!-- Navigator -->