SceneMenuBar conventions

PostHog scenes render a Mac-style menu bar above <SceneTitleSection> that consolidates ScenePanel actions into a discoverable, keyboard-navigable surface. This skill documents the taxonomy, the available primitives, and the wiring rules.

The whole bar is gated by the SCENE_MENU_BAR feature flag (see lib/constants.tsx).

Components

All primitives live in frontend/src/layout/scenes/components/SceneMenuBar.tsx.