Add three exclusivity guards that suppress legacy surfaces during the
initial post-Analyse reflection state (postAnalyseStatus === 'success'):
- CurrentInvestigationCard: suppressed because its selectedQuestion
from startCase was leaking into the initial reflection view
- OpenQuestionsPanel: suppressed because it rendered whenever hasGraph
was true, regardless of initial reflection state
- Terminal state cards (EvidenceLimitCard / CompletionCard): suppressed
because they fired on status='success' && !hasSelectedQuestion
Transition out of initial reflection happens when user clicks a proposed
finding, which sets formulationStep='active' and triggers the existing
deactivation useEffect.
No reasoning changes. No startCase changes. No mock changes.