Add "Group by Layer" — cluster nodes by Senses/Brain/Face
Claude
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b4ad384
New biological-metaphor grouping mode (distinct from the existing
Circular/Rows layouts): Vision+ASR cluster under THE SENSES,
LLM+Orchestration under THE BRAIN, TTS+Avatar+Video+Keyframer under
THE FACE, matching a diagram from the user's own research. Toggling
it doesn't remount the graph like switching Circular/Rows does —
node positions update in place with a ~950ms CSS transform
transition, so nodes glide slowly into their cluster instead of
re-landing. Gold data-flow edges cross between the columns showing
the actual handoffs.
