fix: prevents uncontrolled text field component

src/admin/components/forms/field-types/Text/Input.tsx

@@ -63,7 +63,7 @@ const TextInput: React.FC<TextInputProps> = (props) => {
         required={required}
       />
       <input
-        value={value}
+        value={value || ''}
         onChange={onChange}
         disabled={readOnly}
         placeholder={placeholder}

src/admin/components/forms/field-types/Textarea/Input.tsx

@@ -64,7 +64,7 @@ const TextareaInput: React.FC<TextAreaInputProps> = (props) => {
         required={required}
       />
       <textarea
-        value={value as string || ''}
+        value={value || ''}
         onChange={onChange}
         disabled={readOnly}
         placeholder={placeholder}