## Summary
- prepares emitted dashboard CSS and binds the fixture server before
starting Chrome
- prevents cold client builds from consuming the supervised browser
lifetime
- adds a regression that holds browser launch until fixture preparation
resolves
## Test plan
- `FUSION_DASHBOARD_DEEP=1 pnpm --filter @fusion/dashboard exec vitest
run --project dashboard-app-quality-foundation-ui --pool=vmThreads
--maxWorkers=1 --silent=passed-only --reporter=dot
app/__tests__/browser-layout-smoke-fixture.test.ts`
- `pnpm --filter @fusion/dashboard typecheck`
- `pnpm --filter @fusion/dashboard build`
- `FUSION_BROWSER_SMOKE_REQUIRE=1 pnpm --filter @fusion/dashboard
test:browser-smoke`
- `pnpm exec eslint packages/dashboard/scripts/browser-layout-smoke.mjs
packages/dashboard/app/__tests__/browser-layout-smoke-fixture.test.ts`
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Bug Fixes**
* Improved browser smoke test setup to ensure fixture preparation
completes before the browser launches.
* Added cleanup handling when browser startup fails, preventing leftover
test resources.
* Preserved the primary browser launch error when cleanup also fails,
while recording the cleanup issue.
* **Tests**
* Added coverage for fixture startup order, launch failures, and cleanup
behavior.
* Preserved existing HTML fixture validation.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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