Previously the multi-mode role pick appeared as a sub-section that
expanded inline under the single/multi cards. Per request, separate it
into a dedicated page reached by pressing Next on the mode tab.
- renderStep2 now only handles mode selection (single/multi). Next
routes single → step4 directly, multi → renderStep2Role.
- New renderStep2Role shows the host/participant cards on its own page
with back to renderStep2. Next routes host → step3, participant → step4.
- backToPrevStep in step4 and the back from sub31 in step3 updated so
the role tab is the correct intermediate landing for multi flows.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>