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fix(devtools): stop the SEO head watcher looping and unblock CI The `Test` job died with a JavaScript heap OOM and the `E2e` job failed on all eight apps. Two separate causes. The head watcher looped. `createHeadChanges` observes attributes and character data across the whole `<head>` subtree, and goober rewrites a `<style>` tag there on every `css()` call — it even re-stamps the tag's `nonce` attribute each time. So an SEO analysis re-rendered, the re-render emitted CSS, the CSS mutated `<head>`, and the analysis ran again. The loop is synchronous, so no test timeout could break it and the worker ran to the 4 GB heap limit. Stylesheets carry no SEO metadata, so they are filtered out. jsdom multiplied goober's stylesheets. goober finds its single `<style id="_goober">` through `window._goober`, the global a browser creates for any element with an `id`. jsdom does not do that for `<style>`, so goober appended a new sheet on every `css()` call — about 2500 per Workbench mount, never removed. Test 1 took 0.9s and test 20 took 21s. The test setup now gives goober the global a browser would have: 2504 sheets per mount become 8, and the package's 236 tests run in 38s instead of running out of memory. That let `workbench.test.tsx` finish for the first time, which exposed nine assertions still describing the pre-polish design — the header's trailing gutter, the strip's 8px gutter, the 24px resize handle, a fixed 44px grid row, the strip unmounting when folded, and the SEO label foregrounds. Each now matches the shipped Workbench. The redesign also dropped the test hooks `@tanstack/devtools-e2e` locates the panel and header controls with, which is why every e2e app failed on `openViaTrigger()`. The header carries them again and the tab assertions read `data-tsd-selected` instead of the `active` class the old tabs used.

nx run-many --targets=build --exclude=examples/**,e2e/**

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