svelte: Disable paths.relative for Playwright tests (#13521)

Author: Turbo87

svelte/svelte.config.js

@@ -18,6 +18,10 @@ const config = {
       // to be able to serve it alongside the Ember.js app at `/`.
       // Use empty base path for tests (Vitest unit tests and Playwright e2e tests).
       base: process.env.VITEST || process.env.PLAYWRIGHT ? '' : '/svelte',
+      // Force absolute asset URLs under Playwright so that Percy's DOM
+      // serializer captures hrefs that still resolve when the snapshot is
+      // rendered at a different URL.
+      ...(process.env.PLAYWRIGHT && { relative: false }),
     },
     prerender: {
       origin: `https://${process.env.DOMAIN_NAME ?? 'crates.io'}`,