Enhances dashboard with new metrics and charts

Improves the dashboard with additional metrics and visualizations
to provide a more comprehensive overview of application usage and performance.

Adds new charts, including:
- Word cloud for category analysis
- Geographic map for user distribution (simulated data)
- Response time distribution chart

Refactors existing components for improved clarity and reusability,
including the introduction of a generic `MetricCard` component.

Improves error handling and user feedback during data refresh and
session loading.

Adds recommended VSCode extensions for ESLint and Prettier.

components/LanguageDisplay.tsx

@@ -17,7 +17,7 @@ export default function LanguageDisplay({
   className,
 }: LanguageDisplayProps) {
   const [languageName, setLanguageName] = useState<string>(
-    languageCode || "Unknown",
+    languageCode || "Unknown"
   );
 
   useEffect(() => {