Fix startup scripts and k8s config for initial deployment

- Fix chown/sudo to use numeric UID/GID instead of hardcoded 'claude'
  username (baseimage-gui creates users dynamically, name not available
  at script runtime)
- Fix image name: ghcr.io/cpfarhood/devcontainer (matches github.repository)
- Fix ConfigMap name: antigravity-config -> antigravity (matches statefulset refs)
- Set github-repo in ConfigMap to headlamp-polaris-plugin
- Set HTTPRoute to external gateway at antigravity.dev.farh.net
- Add CLAUDE.md for Claude Code guidance

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>

scripts/startapp.sh

@@ -18,4 +18,5 @@ echo "Opening Antigravity in: $WORKSPACE_DIR"
 
 # Start Antigravity (VSCode) in the workspace directory as claude user
 # The baseimage-gui will handle the GUI display
-exec sudo -u claude code --new-window --wait "$WORKSPACE_DIR"
+RUN_UID="${USER_ID:-1000}"
+exec sudo -u "#$RUN_UID" code --new-window --wait "$WORKSPACE_DIR"