feat: remove ts-ignore

Ensure value is a number.
Expand type to allow getInitialProps.
This allows us to remove ts-ignore which Vercel doesn't seem to like. Which leads to a failing build.

src/mainsite/components/BlobFeesWidget.tsx

@@ -79,8 +79,8 @@ const baseOptions: Highcharts.Options = {
         fontWeight: "300",
       },
       formatter: function () {
-          //@ts-ignore
-          return this.value < 1e-5 ? this.value.toExponential() : this.value;
+        const value = Number(this.value);
+        return value < 1e-5 ? value.toExponential() : value;
       },
     },
     title: undefined,

src/pages/_error.tsx

@@ -65,9 +65,7 @@ const ErrorPage: FC<{ error?: Error; statusCode?: number }> = ({
   );
 };
 
-// eslint-disable-next-line @typescript-eslint/ban-ts-comment
-// @ts-ignore: Unreachable code error
-ErrorPage.getInitialProps = ({ res, err }: { res: unknown; err: unknown }) => {
+(ErrorPage as FC & { getInitialProps: any }).getInitialProps = ({ res, err }: { res: unknown; err: unknown }) => {
   // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
   const statusCode = res
     ? (res as { statusCode?: number }).statusCode