Marcel 3c9e40ca71 test(setup): disable SvelteKit hover prefetch in browser-mode runs ...

Hover-prefetch fires real fetch requests for route loader chunks; those
requests go through the same Playwright route handler that serves mocked
modules. An in-flight prefetch landing after iframe teardown can hit the
handler with a closed birpc channel, raising an unhandled rejection that
exits the run with code 1 even when every individual test was green.

Add `src/test-setup.ts` that sets `document.body.dataset.sveltekitPreloadData
= 'off'` and wire it via `setupFiles` in both `vite.config.ts` (client
project) and `vitest.client-coverage.config.ts` (Istanbul coverage config).
Add `src/__meta__/browser-preload-disabled.svelte.test.ts` asserting the
setup ran. Zero production impact.

Issue #553 secondary trigger.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

2026-05-12 22:02:57 +02:00

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