actually fix transfem-org#118

`note.fileIds` is an array, it's always going to be truthy; we need to
check the length, like a similar `if` does just a few lines above

packages/backend/src/server/api/endpoints/users/notes.ts

@@ -123,7 +123,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 							}
 						}
 
-						if (ps.withFiles && !note.fileIds) return false;
+						if (ps.withFiles && note.fileIds.length === 0) return false;
 
 						if (note.channel?.isSensitive && !isSelf) return false;
 						if (note.visibility === 'specified' && (!me || (me.id !== note.userId && !note.visibleUserIds.some(v => v === me.id)))) return false;