Bugfix/allocate remaining percentage to unknown data in portfolio proportion chart (#6054)

* Allocate remaining percentage to unknown data in portfolio proportion chart

* Update changelog

CHANGELOG.md

@@ -12,6 +12,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Moved the notification module to `@ghostfolio/ui`
 - Improved the language localization for German (`de`)
 
+### Fixed
+
+- Fixed a calculation issue that resulted in the incorrect assignment of unknown data in the portfolio proportion chart component
+
 ## 2.222.0 - 2025-12-07
 
 ### Added

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

@@ -1,6 +1,6 @@
 import { getTooltipOptions } from '@ghostfolio/common/chart-helper';
 import { UNKNOWN_KEY } from '@ghostfolio/common/config';
-import { getLocale, getTextColor } from '@ghostfolio/common/helper';
+import { getLocale, getSum, getTextColor } from '@ghostfolio/common/helper';
 import {
   AssetProfileIdentifier,
   PortfolioPosition
@@ -193,6 +193,30 @@ export class GfPortfolioProportionChartComponent
       });
     }
 
+    if (this.isInPercent) {
+      const totalValueInPercentage = getSum(
+        Object.values(chartData).map(({ value }) => {
+          return value;
+        })
+      );
+
+      const unknownValueInPercentage = new Big(1).minus(totalValueInPercentage);
+
+      if (unknownValueInPercentage.gt(0)) {
+        // If total is below 100%, allocate the remaining percentage to UNKNOWN_KEY
+        if (chartData[UNKNOWN_KEY]) {
+          chartData[UNKNOWN_KEY].value = chartData[UNKNOWN_KEY].value.plus(
+            unknownValueInPercentage
+          );
+        } else {
+          chartData[UNKNOWN_KEY] = {
+            name: UNKNOWN_KEY,
+            value: unknownValueInPercentage
+          };
+        }
+      }
+    }
+
     let chartDataSorted = Object.entries(chartData)
       .sort((a, b) => {
         return a[1].value.minus(b[1].value).toNumber();