fix: restore :80 port in service proxy URL

The removal of :80 in commit 39d85a3 broke service proxy requests.
Kubernetes API requires explicit port specification when services
have named ports. Without it, the API server returns "no endpoints
available" even though endpoints exist.

Root cause: polaris-dashboard service defines port as named
"http-dashboard" on port 80. The proxy sub-resource requires
either :80 or :http-dashboard suffix to resolve correctly.

Fixes the "Polaris dashboard not reachable" error on v0.1.4.

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/api/polaris.ts

@@ -157,7 +157,8 @@ export function computeScore(counts: ResultCounts): number {
 
 // --- Data fetching hook ---
 
-const POLARIS_API_PATH = '/api/v1/namespaces/polaris/services/polaris-dashboard/proxy/results.json';
+const POLARIS_API_PATH =
+  '/api/v1/namespaces/polaris/services/polaris-dashboard:80/proxy/results.json';
 
 interface PolarisDataState {
   data: AuditData | null;