refactor(website): migrate covid "compare side-by-side" to React

[fengelniederhammer]

resolves #981

Summary

Screenshot

PR Checklist

- [ ] All necessary documentation has been adapted.

• The implemented feature is covered by an appropriate test.

[vercel]

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Project	Deployment	Review	Updated (UTC)
dashboards	Ready	Preview, Comment	Dec 19, 2025 9:49am

[Copilot]

Pull request overview

This PR refactors the COVID "compare side-by-side" page by migrating from Astro-based rendering to a React-based component architecture. The changes centralize the page logic into a reusable generic component while maintaining organism-specific functionality.

• Replaces 130+ lines of inline Astro code with a generic component pattern
• Moves the relative growth advantage visualization to the shared component with organism-specific rendering
• Simplifies the page entry point to a single component instantiation

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
website/src/pages/covid/compare-side-by-side.astro	Replaced inline implementation with GenericCompareSideBySidePage component call
website/src/components/views/compareSideBySide/GenericCompareSideBySideDataDisplay.tsx	Added organism-specific conditional rendering for GsRelativeGrowthAdvantage component

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[fengelniederhammer]

This was another difference to the generic page - but I think the logic is already handled by this:

dashboards/website/src/views/pageStateHandlers/PageStateHandler.ts

Lines 14 to 28 in ae2e48e

	export function toLapisFilterWithVariant({ variantFilter, datasetFilter, additionalFilters }: FilterData) {
	if (variantFilter.variantQuery) {
	return {
	...toLapisFilterWithoutVariant(datasetFilter, additionalFilters),
	variantQuery: variantFilter.variantQuery,
	};
	} else {
	return {
	...toLapisFilterWithoutVariant(datasetFilter, additionalFilters),
	...variantFilter.lineages,
	...variantFilter.mutations,
	advancedQuery: concatenateAdvancedQueries(datasetFilter.advancedQuery, variantFilter.advancedQuery),
	};
	}
	}