highlight all same-net traces on hover

[GautamKumarOffical]

Fixes tscircuit/tscircuit#1130

Adds a useHighlightConnectedTracesOnHover hook that highlights all schematic traces on the same net when hovering any trace segment.

Changes:

• New hook: lib/hooks/useHighlightConnectedTracesOnHover.ts
• Integrates the hook into SchematicViewer.tsx

How it works:

• Builds a traceId -> netId mapping from circuit JSON using union-find on shared source ports
• Attaches mouseenter/mouseleave listeners to trace SVG elements
• On hover, applies an amber highlight with glow effect to all traces sharing the same net
• Cleans up listeners and styles properly on unmount

Verified:

• bun run format:check passes
• bunx tsc --noEmit passes
• bun run build passes

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Project	Deployment	Actions	Updated (UTC)
schematic-viewer	Ready	Preview, Comment	Jun 22, 2026 4:59am