fix: hide label of textarea in right side panel + align switch to the left (#8279)

<img width="350" alt="image"
src="https://github.com/user-attachments/assets/3ff3f83c-163b-44df-8b68-7fe18c3266c4"
/>
 | 
<img width="350" alt="CleanShot 2026-01-23 at 21 25 04@2x"
src="https://github.com/user-attachments/assets/c2c630f3-6990-4a55-aa8f-a19297ffee52"
/>

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8279-fix-hide-label-of-textarea-in-right-side-panel-align-switch-to-the-left-2f16d73d365081e9b932fb2be873b660)
by [Unito](https://www.unito.io)

---------

Co-authored-by: GitHub Action <action@github.com>
Co-authored-by: Alexander Brown <drjkl@comfy.org>

src/types/widgetTypes.ts

@@ -1,5 +1,11 @@
+import { inject } from 'vue'
 import type { InjectionKey } from 'vue'
 
 export type AssetKind = 'image' | 'video' | 'audio' | 'model' | 'unknown'
 
 export const OnCloseKey: InjectionKey<() => void> = Symbol()
+
+export const HideLayoutFieldKey: InjectionKey<boolean> = Symbol()
+export function useHideLayoutField(): boolean {
+  return inject(HideLayoutFieldKey, false)
+}