feat: manual odometer baseline — Settings field computes baseline + trip distance, Dashboard shows (manual) label

static/js/settings.js

@@ -38,6 +38,7 @@ const fields = {
     deviceCarModel: document.getElementById('device-car-model'),
     deviceAvatarPath: document.getElementById('device-avatar-path'),
     deviceName: document.getElementById('device-name'),
+    odometerBaseline: document.getElementById('odometer-baseline'),
     remoteServerUrl: document.getElementById('remote-server-url'),
     remoteDeviceName: document.getElementById('remote-device-name'),
     remoteApiKey: document.getElementById('remote-api-key'),
@@ -91,6 +92,7 @@ function applyErrors(errors) {
         car_model: fields.deviceCarModel,
         avatar_path: fields.deviceAvatarPath,
         device_name: fields.deviceName,
+        odometer_baseline: Number(fields.odometerBaseline.value) || 0,
         server_url: fields.remoteServerUrl,
         remote_device_name: fields.remoteDeviceName,
         api_key: fields.remoteApiKey,
@@ -128,6 +130,7 @@ function populate(settings) {
     fields.ntfyToken.value = '';
     fields.clearNtfyUrl.checked = false;
     fields.clearNtfyToken.checked = false;
+    fields.odometerBaseline.value = (settings.odometer_baseline || 0).toFixed(1);
 }
 
 function populateDeviceConfig(deviceConfig) {
@@ -136,6 +139,7 @@ function populateDeviceConfig(deviceConfig) {
     fields.deviceCarModel.value = deviceConfig.car_model;
     fields.deviceAvatarPath.value = deviceConfig.avatar_path;
     fields.deviceName.value = deviceConfig.device_name || '';
+    fields.odometerBaseline.value = (deviceConfig.odometer_baseline || 0).toFixed(1);
     updateDeviceConfigFieldsState();
 }
 
@@ -178,6 +182,7 @@ function payload() {
             gps_loss_seconds: Number(fields.gpsLoss.value),
             repeat_seconds: Number(fields.repeat.value),
         },
+        odometer_baseline: Number(fields.odometerBaseline.value) || 0,
     };
 }