v0.30.0

• Add opt-in host-owned Process Modeler variable name, scope, add and remove
  controls with a typed edit-request event. Preserve focus through reordered,
  deferred and empty-name host echoes and use theme error tokens (#417).
• Keep the minimap viewport visible during distant pans, preserve graph
  proportions, and align click-to-jump with its displayed bounds (#418).
• Match pinned Outline Copy placement, typography and selection target sizes
  (#420).