Fix 'Complex Method' issue in src\components\ui\chart.tsx

[CodeFactor](https://www.codefactor.io/repository/github/rectiflex/blockwise-keeper/overview/main) found an issue: Complex Method

It's currently on:
[src\components\ui\chart.tsx:187-267](https://www.codefactor.io/repository/github/rectiflex/blockwise-keeper/source/main/src/components/ui/chart.tsx#L187)