Minor release. New top-tab `Capabilities` rendering the active YAML
doc as a Domain → Subject area → Concept hierarchy.

  - Real-time search across concept names, owners, tags, subject
    areas, and domains.
  - Concept chips drill into Diagram view-mode with the Build panel
    open on the inline-editable Selected Concept block.
  - Visibility tinting (internal / shared / public) to surface PII
    concepts visually.
  - Domain fallback chain: entity.domain → doc.domain →
    doc.model.domain → 'Uncategorized'.
  - Lazy-loaded so the bundle only grows for users who open the tab.
  - 8 new unit tests.

PR: #99