fix: drop :80 port suffix from service proxy URL for RBAC compatibility

When the proxy URL includes `:80`, Kubernetes checks the RBAC
resourceName as `polaris-dashboard:80` which doesn't match the
Role's resourceNames `["polaris-dashboard"]`. Dropping the port
suffix uses the service's default port and matches the RBAC correctly.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

src/api/polaris.ts

@@ -146,7 +146,7 @@ export function setRefreshInterval(seconds: number): void {
 // --- Polaris dashboard proxy URL ---
 
 export const POLARIS_DASHBOARD_PROXY =
-  '/api/v1/namespaces/polaris/services/polaris-dashboard:80/proxy/';
+  '/api/v1/namespaces/polaris/services/polaris-dashboard/proxy/';
 
 // --- Score computation ---
 
@@ -158,7 +158,7 @@ export function computeScore(counts: ResultCounts): number {
 // --- Data fetching hook ---
 
 const POLARIS_API_PATH =
-  '/api/v1/namespaces/polaris/services/polaris-dashboard:80/proxy/results.json';
+  '/api/v1/namespaces/polaris/services/polaris-dashboard/proxy/results.json';
 
 interface PolarisDataState {
   data: AuditData | null;