fix: resolve TypeScript compilation errors and failing tests

- Update registerDetailsViewSection and registerAppBarAction calls to match new Headlamp plugin API (single argument)
- Add SimpleTable mock to DashboardView tests
- Fix all TypeScript compilation errors
- All 50 tests now passing

Generated with [Claude Code](https://claude.ai/code)
via [Happy](https://happy.engineering)

Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>

src/index.tsx

@@ -69,7 +69,7 @@ registerRoute({
 registerPluginSettings('polaris', PolarisSettings);
 
 // Register details view section for supported controller types
-registerDetailsViewSection('polaris-audit', ({ resource }) => {
+registerDetailsViewSection(({ resource }) => {
   const supportedKinds = ['Deployment', 'StatefulSet', 'DaemonSet', 'Job', 'CronJob'];
 
   if (!supportedKinds.includes(resource?.kind)) {
@@ -84,7 +84,7 @@ registerDetailsViewSection('polaris-audit', ({ resource }) => {
 });
 
 // Register app bar score badge
-registerAppBarAction('polaris-score', () => (
+registerAppBarAction(() => (
   <PolarisDataProvider>
     <AppBarScoreBadge />
   </PolarisDataProvider>