fix(e2e): write HEADLAMP_URL before token gen; add pods RBAC

Fix two bugs from PRI-879 QA review:

- HEADLAMP_URL is now written to .env.e2e unconditionally, before
  attempting token generation. Previously it was only written when
  token generation succeeded, causing tests to fail if the token
  command errored.

- ClusterRole headlamp-e2e-test-reader now includes pods get/list/watch
  so the Rook PodsPage can populate without permission errors.

Does not address the popup race in auth.setup.ts — that file was not
changed because the popup race claim in PRI-879 does not match the
actual code order. The popupPromise (line 9) is already captured before
the click (line 10) in the source file.

Fixes: PRI-879

Co-Authored-By: Paperclip <noreply@paperclip.ing>

scripts/deploy-e2e-headlamp.sh

@@ -87,6 +87,9 @@ rules:
   - apiGroups: [""]
     resources: ["persistentvolumeclaims"]
     verbs: ["get", "list", "watch"]
+  - apiGroups: [""]
+    resources: ["pods"]
+    verbs: ["get", "list", "watch"]
 ---
 apiVersion: rbac.authorization.k8s.io/v1
 kind: ClusterRoleBinding
@@ -216,15 +219,18 @@ done
 echo ""
 echo "E2E Headlamp is ready at: ${SVC_URL}"
 
+echo ""
+echo "Writing E2E env file..."
+echo "HEADLAMP_URL=${SVC_URL}" > "$REPO_ROOT/.env.e2e"
+
 echo ""
 echo "Creating service account token for E2E auth..."
 TOKEN=$(kubectl create token headlamp-e2e-test -n "$E2E_NAMESPACE" --duration=1h 2>/dev/null || echo "")
 if [ -n "$TOKEN" ]; then
-  echo "HEADLAMP_URL=${SVC_URL}" > "$REPO_ROOT/.env.e2e"
   echo "HEADLAMP_TOKEN=${TOKEN}" >> "$REPO_ROOT/.env.e2e"
   echo "Wrote .env.e2e with HEADLAMP_URL and HEADLAMP_TOKEN"
 else
-  echo "  WARNING: Could not generate token."
+  echo "Wrote .env.e2e with HEADLAMP_URL only (token generation failed, using OIDC fallback)"
 fi
 
 echo ""