Fix stats endpoint returning null for totalPointsTracked

CHANGELOG.md

@@ -4,6 +4,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
+# [UNRELEASED]
+
+## Fixed
+
+- `GET /api/v1/stats` endpoint now returns correct 0 instead of null if no points were tracked in the requested period.
+
 # [0.33.0] - 2025-09-29
 
 ## Fixed

app/serializers/stats_serializer.rb

@@ -10,7 +10,7 @@ class StatsSerializer
   def call
     {
       totalDistanceKm: total_distance_km,
-      totalPointsTracked: user.points_count,
+      totalPointsTracked: user.points_count.to_i,
       totalReverseGeocodedPoints: reverse_geocoded_points,
       totalCountriesVisited: user.countries_visited.count,
       totalCitiesVisited: user.cities_visited.count,