Fix two issues identified in code review:
1. Critical: onViewFromHistory was a silent no-op. Now navigates to the
SessionDetail page using the same route pattern as the external link in
RunHistory, allowing users to view a finished run's transcript.
2. Important: Removed dead slashCommands={[]} prop from RunSetup invocation.
Made slashCommands optional in RunSetupProps to maintain type safety while
reflecting that the discovery logic was removed.
All tests pass (396 client, 1152 server).
nntrivi2001
d581705eb0