V110 V109 UI Runner Hotfix — full-files delta only

Replace/add these files at the same repo paths:
app/page.tsx
fixtures/v109-successor-federation/dn1.json
fixtures/v109-successor-federation/dn2.json
fixtures/v109-successor-federation/freeze.json
V110_V109_UI_RUNNER_HOTFIX.md

Harmonic core changes: NONE
