feat(ScrollArea): add shadcn ScrollArea component with custom scrollbars (#342)

- Add @radix-ui/react-scroll-area dependency
- Create ScrollArea component in src/components/Layout/ScrollArea
- Add scrollHorizontalWithWheel prop for horizontal-only scroll areas
- Add Storybook stories for ScrollArea
- Update LiveProbeEvents to use ScrollArea for Recent Probes panel
- Update GridHeatmap to use ScrollArea with horizontal wheel scroll
- Update CellProbeDialog to use ScrollArea for probe list
- Configure Vite proxy to use production API for development

Author: raulk

package.json

@@ -26,6 +26,7 @@
     "@fontsource-variable/space-grotesk": "5.2.10",
     "@headlessui/react": "2.2.9",
     "@heroicons/react": "2.2.0",
+    "@radix-ui/react-scroll-area": "^1.2.10",
     "@tailwindcss/vite": "4.1.17",
     "@tanstack/react-query": "5.90.8",
     "@tanstack/react-router": "1.135.2",