## Summary
Replace PrimeVue `FloatLabel` + `Textarea` in `WidgetTextarea` with a
CSS-only IFTA label and a new shadcn-vue Textarea component, fixing the
label-obscures-content bug.
<img width="965" height="754" alt="image"
src="https://github.com/user-attachments/assets/cab98527-834c-496d-a0ef-942fb21fd862"
/>
## Changes
- **What**: Add `src/components/ui/textarea/Textarea.vue` — thin wrapper
around native `<textarea>` with `cn()` class merging and `defineModel`.
Rewrite `WidgetTextarea.vue` to use a plain `<div>` wrapper with an
absolutely-positioned label and the new Textarea, replacing PrimeVue's
`FloatLabel variant="in"`. Add Storybook stories (Default, Disabled,
WithLabel). Update tests to remove PrimeVue plugin setup.
## Review Focus
- The label uses `absolute left-3 top-1.5 z-10 text-xxs` positioning —
verify it clears textarea content with `pt-5` padding
- `filteredProps` forwards widget options to a native textarea via
`v-bind="restAttrs"` — unknown attrs are silently ignored by the browser
Supersedes #8536
┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-9076-fix-replace-PrimeVue-FloatLabel-in-WidgetTextarea-with-CSS-only-IFTA-label-30f6d73d3650816fabe5ee30de0c793e)
by [Unito](https://www.unito.io)
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Co-authored-by: github-actions <github-actions@github.com>
