Tests

add +page.server.ts for model detail page and unit test +page.svelte #1250

Job	Run time
scripts (scripts/metrics/eval_discovery.py)	1m 24s
scripts (scripts/model_figs/run_all.py)	3m 53s
vitest / tests	54s
pytest (ubuntu-latest) / tests	1m 49s
pytest (windows-latest) / tests	6m 1s
	14m 1s

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