Highlight all same-net schematic traces on hover

[TodouWisiper]

Summary

• add SVG hover handling that maps the hovered schematic trace to its source trace
• expand the highlight to every schematic trace whose source trace shares any connected_source_net_ids
• restore each visible trace path's original stroke when hover leaves and disable this behavior while edit mode is active

This targets tscircuit/tscircuit#1130, including the reviewer feedback that another trace on the same net should highlight even when it is not the exact same source trace segment.

Tests

• npx biome check lib\components\SchematicViewer.tsx lib\hooks\useHighlightConnectedSchematicTracesOnHover.ts
• npx bun run build

Fixes tscircuit/tscircuit#1130

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Project	Deployment	Actions	Updated (UTC)
schematic-viewer	Ready	Preview, Comment	May 14, 2026 10:17am

[TodouWisiper]

/claim tscircuit/tscircuit#1130