Fix empty state (chart with two levels)

libs/ui/src/lib/portfolio-proportion-chart/portfolio-proportion-chart.component.ts

@@ -248,6 +248,12 @@ export class PortfolioProportionChartComponent
       datasets[0].data[0] = Number.MAX_SAFE_INTEGER;
     }
 
+    if (datasets[1]?.data?.length === 0 || datasets[1]?.data?.[1] === 0) {
+      labels = [''];
+      datasets[1].backgroundColor = [this.colorMap[UNKNOWN_KEY]];
+      datasets[1].data[1] = Number.MAX_SAFE_INTEGER;
+    }
+
     const data: ChartConfiguration['data'] = {
       datasets,
       labels