test: add vitest coverage for tool render modules #262

Job	Run time
mypy	23s
Verify prod requirements.txt is sufficient	6s
API integration tests + coverage (ubuntu-latest)	20s
ruff + pip-audit (windows-latest)	58s
Performance benchmarks (gated)	30s
Frontend unit tests (vitest) (ubuntu-latest)	28s
ruff + pip-audit (ubuntu-latest)	23s
Frontend unit tests (vitest) (windows-latest)	57s
API integration tests + coverage (windows-latest)	52s
API integration tests + coverage (macos-latest)	18s
ruff + pip-audit (macos-latest)	18s
Frontend unit tests (vitest) (macos-latest)	23s
pytest (ubuntu-latest)	47s
pytest (macos-latest)	32s
pytest (windows-latest)	1m 21s
	8m 36s

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