fix(Textarea): prevent baseline shift in forms

[Akur1a]

What changed

Adds �lign-top to the Textarea root classes so it doesn't participate in baseline alignment when it sits inline in a form layout.

This keeps the existing Input root classes intact, but avoids the small vertical jump that can show up when an empty textarea is disabled during submit.

Fixes #6541

Testing

• npm run test -- Textarea
• npm exec -- eslint src/theme/textarea.ts test/components/Textarea.spec.ts
• npm run build

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 9d191a63-f560-4da3-a8ee-f115946c6daf

📥 Commits

Reviewing files that changed from the base of the PR and between 4da3a5d and efb5e00.

⛔ Files ignored due to path filters (2)

• test/components/__snapshots__/Textarea-vue.spec.ts.snap is excluded by !**/*.snap
• test/components/__snapshots__/Textarea.spec.ts.snap is excluded by !**/*.snap

📒 Files selected for processing (2)

• src/theme/textarea.ts
• test/components/Textarea.spec.ts

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📝 Walkthrough

Walkthrough

This PR addresses a form layout shift that occurs when a textarea is empty and disabled during form submission. The change adds relative inline-flex items-center align-top Tailwind classes to the textarea root slot styling. A new test case verifies that the component renders with the align-top class attribute.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change: adding align-top to Textarea to fix baseline shift in forms.
Description check	✅ Passed	The description clearly explains the changes and references the specific issue being fixed (#6541).
Linked Issues check	✅ Passed	The PR directly addresses issue #6541 by adding align-top to Textarea root classes to prevent baseline shift when empty.
Out of Scope Changes check	✅ Passed	All changes are focused on fixing the baseline shift issue; the Textarea module update and corresponding test are directly scoped to the linked objective.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[pkg-pr-new]

npm i https://pkg.pr.new/@nuxt/ui@6559

commit: 8db9446