WIP dark mode improvements

[txase]

The goal is to have enough contrast in the graph view for shadows to make sense.

[github-actions]

Coverage Report

Status	Category	Percentage	Covered / Total
🔵	Lines	49.84%	1461 / 2931
🔵	Statements	50.14%	1513 / 3017
🔵	Functions	38.86%	239 / 615
🔵	Branches	45.91%	765 / 1666

File Coverage

File	Stmts	Branches	Functions	Lines	Uncovered Lines
Changed Files
src/ELKEdge.tsx	8.33%	0%	0%	8.57%	18-28, 32-69, 80-103
src/QueryGraph.tsx	29.78%	15%	38.09%	28.88%	59-94, 124-131, 140-162, 216-332
src/ResourceNode.tsx	53.77%	59.77%	40.9%	53.77%	66-81, 104-107, 176-185, 193, 195, 206-227, 237-258, 287, 302-469

Generated in workflow #30 for commit b317567 by the Vitest Coverage Report Action