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.

.vscode/extensions.json

@@ -1,3 +1,7 @@
 {
-  "recommendations": ["prisma.prisma"]
+  "recommendations": [
+    "prisma.prisma",
+    "dbaeumer.vscode-eslint",
+    "rvest.vs-code-prettier-eslint"
+  ]
 }