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Add a `compact` prop that renders the phase rail as minimal pills: - Shows only phase indicators: ✓ (completed), 📍 (current), ○ (upcoming) - No expanded current phase section - No decision graph in compact mode - Suitable for top bar placement in focused walker views Also integrates FlowchartDecisionGraph for inline decision rendering when not in compact mode. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>