feat: add MeasurementDetailScreen, 365-day charts, and edit support

- New MeasurementDetailScreen with wijzigen/verwijderen
- WeightChart now supports 30 and 365 days
- NewMeasurementScreen now handles both create and edit
- Updated README to match current code
- Add build-toolchain documentation
- Ignore *.apk build artifacts

src/components/LatestMeasurementCard.tsx

@@ -47,8 +47,8 @@ const styles = StyleSheet.create({
   card: { backgroundColor: '#fff', borderRadius: 12, padding: 16, margin: 16, shadowColor: '#000', shadowOpacity: 0.1, shadowRadius: 8, elevation: 3 },
   title: { fontSize: 18, fontWeight: '700', marginBottom: 4 },
   date: { fontSize: 14, color: '#666', marginBottom: 12 },
-  row: { flexDirection: 'row', justifyContent: 'space-between', paddingVertical: 4 },
-  rowLabel: { fontSize: 14, color: '#555' },
+  row: { flexDirection: 'row', paddingVertical: 4 },
+  rowLabel: { fontSize: 14, color: '#555', flex: 1 },
   rowValue: { fontSize: 14, fontWeight: '600' },
   emptyText: { fontSize: 16, color: '#999', textAlign: 'center', padding: 20 },
 })