release: v0.4.1 — code quality fixes and doc updates

Remove unsafe `as any` casts, fix MetricsPage fetch cancellation safety,
delete dead AppBarGpuBadge component, fix typo in data context, move
extractJsonData to module scope, resolve ESLint/Prettier indent conflict,
fix artifacthub-pkg.yml version mismatch and inaccurate description.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "intel-gpu",
-  "version": "0.4.0",
+  "version": "0.4.1",
   "description": "Headlamp plugin for Intel GPU device plugin visibility and monitoring",
   "repository": {
     "type": "git",