New users on a shared device were picking up a previous user's stale
(potentially empty) dashboard layout from localStorage because the key
"capakraken_dashboard_v1" was not user-scoped.
- useDashboardLayout: key is now capakraken_dashboard_v1_{userId};
userId is resolved via trpc.user.me before touching localStorage
- Initial state falls back to createDefaultDashboardLayout() until
userId resolves, then hydrates from the user-scoped key
- DB layout still wins over localStorage when it has data (unchanged)
- E2E test suite covers: new-user flow, modal widget list, add widget
persists after reload, cross-user localStorage isolation
- plan.md: added ticket #27 implementation plan
Co-Authored-By: claude-flow <ruv@ruv.net>
