Update billing page data handling and version bump to 2.12.0 (#300)

* Update billing page data handling and version bump to 2.12.0

- Refactored billing page components to streamline data loading for subscriptions and orders.
- Introduced `getProductPlan` function to encapsulate product plan resolution logic.
- Updated `package.json` version from 2.11.0 to 2.12.0.

apps/web/app/home/[account]/_components/dashboard-demo-charts.tsx

@@ -815,7 +815,7 @@ export function PageViewsChart() {
       desktop: chartData.reduce((acc, curr) => acc + curr.desktop, 0),
       mobile: chartData.reduce((acc, curr) => acc + curr.mobile, 0),
     }),
-    [],
+    [chartData],
   );
 
   return (