Double-clicking a flow element now opens a rich tabbed panel below the node:
- Config tab: form inputs (label, thresholds with range sliders, source type, status)
- Analytics tab: live-updating fill bars, conic-gradient outflow/overflow donut, stats
- Allocations tab: read-only allocation breakdowns with colored dots
- Simulation overlay preserved during ticks, analytics accumulate per-node metrics
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
