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

modules/app_settings.py

@@ -26,8 +26,11 @@ def _setting_bool(key, env_name=None, default=False):
     return app_sql.get_setting(key, fallback) == "1"
 
 
-def _number_value(setting_key, converter):
-    default = app_alerts.SETTING_DEFAULTS[setting_key]
+def _number_value(setting_key, converter, fallback=None):
+    if fallback is not None:
+        default = fallback
+    else:
+        default = app_alerts.SETTING_DEFAULTS[setting_key]
     try:
         return converter(app_sql.get_setting(setting_key, default))
     except (TypeError, ValueError):
@@ -53,6 +56,7 @@ def get_settings():
         "ntfy_token_configured": bool(
             app_sql.get_setting("alert_ntfy_token", "")
         ),
+        "odometer_baseline": _number_value("odometer_baseline", float, 0),
         "alert_thresholds": {
             field: _number_value(setting_key, converter)
             for field, (
@@ -132,6 +136,10 @@ def update_settings(body):
     if values["cellular_enabled"] and not apn:
         errors["cellular_apn"] = "An APN is required when cellular is enabled."
 
+    values["odometer_baseline"] = _bounded_number(
+        body, "odometer_baseline", float, 0, 999_999, errors
+    )
+
     ntfy_url = body.get("ntfy_url")
     ntfy_token = body.get("ntfy_token")
     if not isinstance(ntfy_url, str):
@@ -199,6 +207,9 @@ def update_settings(body):
     for setting_key, _converter, _minimum, _maximum in _NUMBER_FIELDS.values():
         settings[setting_key] = str(values[setting_key])
 
+    if values["odometer_baseline"] is not None:
+        settings["odometer_baseline"] = str(values["odometer_baseline"])
+
     if values["clear_ntfy_url"]:
         settings["alert_ntfy_url"] = ""
     elif ntfy_url: