- Add self-peer for local mesh testing without remote nodes
- Add gigogne (nested matryoshka) distribution mode with configurable depth
- Add distribution mode selector: gigogne, mono, ring, full-mesh
- Add visual indicators for self/gigogne peers on globe and peers panel
- Add test mode badge and clear test button
- Add rebuildGigogneStructure for dynamic mode switching
- Update CSS with gigogne/self peer styles and animations
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>