Fix OpenBao login falling back to token auth

Add synchronous redirect-bootstrap, direct KeyCape OIDC on sign-in, and mount
watching so the UI no longer lands on ?with=token when netkingdom is hidden
from unauthenticated mount listing. Document listing_visibility tune helper.

scripts/openbao-ui-overlay-apply.sh

@@ -27,7 +27,7 @@ if [ "${1:-}" = "-h" ] || [ "${1:-}" = "--help" ]; then
   exit 0
 fi
 
-for required in overlay.css overlay.js presets.json nginx.conf VERSION; do
+for required in overlay.css overlay.js redirect-bootstrap.js presets.json nginx.conf VERSION; do
   if [ ! -f "$OVERLAY_DIR/$required" ]; then
     echo "missing overlay asset: $OVERLAY_DIR/$required" >&2
     exit 1
@@ -47,6 +47,7 @@ $KUBECTL create configmap openbao-ui-overlay \
   --namespace "$OPENBAO_NAMESPACE" \
   --from-file="$OVERLAY_DIR/overlay.css" \
   --from-file="$OVERLAY_DIR/overlay.js" \
+  --from-file="$OVERLAY_DIR/redirect-bootstrap.js" \
   --from-file="$OVERLAY_DIR/presets.json" \
   --from-file="$OVERLAY_DIR/VERSION" \
   --dry-run=client -o yaml | $KUBECTL apply -f -