Walks every cable's polyline, keys each vertex by stable identity
(port:N / device:N / io:N / clamp:N), and accumulates cables by
undirected segment-key. Segments with ≥ 2 cables get a thick striped
overlay line in a new <g id="canvas-bundles"> layer, drawn on top of
the individual cable lines so the shared portion reads as a bundle
while endpoints still fan out to each cable's port colour.
- Stripe width: 2 + N px, capped at 12 (design v5 §11.3).
- Stripe order: by distinct cable-type count (ties by id) per
v5 §11.9 q4.
- Implementation: SVG <linearGradient> with hard stops oriented
perpendicular to the segment, registered in a new
<defs id="canvas-defs"> on every render. Bundle <line> uses
stroke="url(#bundle-grad-…)".
- <title> child lists the cable types and total cable count for
hover tooltips.
- Clamp render gains a ×N badge when ≥ 2 cables route through it,
derived independently from state.cableClamps.
Helper rename: cableVertices → cableVerticesWithKeys (returns
{vertices, keys}). The keys array also feeds the shared-segment
detection — keeps the geometry + identity tracking in one pass.
mAi
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