feat: add bar chart toggle to dashboard

Added visx bar chart component with rounded corners and grow animation.
Dashboard now has area/bar toggle buttons next to the export icon.

package.json

@@ -25,6 +25,7 @@
     "@types/d3": "^7.4.3",
     "@visx/curve": "^3.12.0",
     "@visx/event": "^3.12.0",
+    "@visx/gradient": "^3.12.0",
     "@visx/grid": "^3.12.0",
     "@visx/responsive": "^3.12.0",
     "@visx/scale": "^3.12.0",