Fix field widget textarea focus reset (#21959)

Short description: Keeps the field widget textarea on a local draft
value while focused so record-store rewrites do not reset the active
caret.

# Before

Typing in an editor-mode text field can lose caret position when the
global record store is rewritten by an external record update/refetch.


https://github.com/user-attachments/assets/1ee7a819-2c27-4d09-aae5-814c2cf27181


# After

The focused textarea should preserve the in-progress draft and caret
while still updating sibling previews optimistically and flushing the
final value on blur.


https://github.com/user-attachments/assets/41832493-021f-46e8-bc75-722bbb1cd7b7



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packages/twenty-front/src/modules/ui/input/components/TextArea.tsx

@@ -22,6 +22,7 @@ export type TextAreaProps = {
   placeholder?: string;
   value?: string;
   className?: string;
+  onFocus?: () => void;
   onBlur?: () => void;
   readOnly?: boolean;
   variant?: TextAreaVariant;
@@ -102,6 +103,7 @@ export const TextArea = ({
   value = '',
   className,
   onChange,
+  onFocus,
   onBlur,
   readOnly = false,
   variant = 'default',
@@ -127,6 +129,8 @@ export const TextArea = ({
         enableGlobalHotkeysConflictingWithKeyboard: false,
       },
     });
+
+    onFocus?.();
   };
 
   const handleBlur: FocusEventHandler<HTMLTextAreaElement> = () => {