Fix K8s pod creation: use correct V1Pod format

- Remove apiVersion and kind from pod spec (not needed for client-node)
- Remove namespace from metadata (passed as parameter)
- Use proper V1Pod type from @kubernetes/client-node

Co-Authored-By: Claude Sonnet 4.5 (1M context) <noreply@anthropic.com>

src/lib/k8s.ts

@@ -43,13 +43,10 @@ export function getK8sClient(): k8s.CoreV1Api {
 /**
  * Create pod spec for agent
  */
-export function createAgentPodSpec(podName: string, userId: string) {
+export function createAgentPodSpec(podName: string, userId: string): k8s.V1Pod {
   return {
-    apiVersion: 'v1',
-    kind: 'Pod',
     metadata: {
       name: podName,
-      namespace: 'agents',
       labels: {
         app: 'claude-agent',
         userId: userId,