delete attachment when file is removed from activity body (#11952)

Using useEffect triggered at ActivityRichTextEditor unmount, to delete
attachments only when note is closed (and not when file block is deleted
during note update to keep command + z shortcut)

closes : https://github.com/twentyhq/twenty/issues/11229

packages/twenty-front/src/modules/activities/utils/getActivityAttachmentPathsToRestore.ts

@@ -0,0 +1,17 @@
+import { Attachment } from '@/activities/files/types/Attachment';
+import { getActivityAttachmentPaths } from '@/activities/utils/getActivityAttachmentPaths';
+import { getAttachmentPath } from '@/activities/utils/getAttachmentPath';
+
+export const getActivityAttachmentPathsToRestore = (
+  newActivityBody: string,
+  oldActivityAttachments: Attachment[],
+) => {
+  const newActivityAttachmentPaths =
+    getActivityAttachmentPaths(newActivityBody);
+
+  return newActivityAttachmentPaths.filter((fullPath) =>
+    oldActivityAttachments.every(
+      (attachment) => getAttachmentPath(attachment.fullPath) !== fullPath,
+    ),
+  );
+};