test(HH-592): cover realtime timestamp boundaries (#153)

Co-authored-by: Rogee <rogee@ipao.vip>

frontend/app/javascript/widget/helpers/specs/actionCable.spec.js

@@ -113,7 +113,7 @@ describe('Widget ActionCableConnector', () => {
     expect(IFrameHelper.sendMessage).not.toHaveBeenCalled();
   });
 
-  it('rejects an older numeric-string timestamp against an ISO timestamp', async () => {
+  it('treats an exact 1e10 numeric string as milliseconds', async () => {
     const currentMessage = {
       id: 42,
       conversation_id: 7,
@@ -126,7 +126,7 @@ describe('Widget ActionCableConnector', () => {
     await actionCable.onMessageUpdated({
       ...currentMessage,
       content: 'older',
-      updated_at: '1787533200',
+      updated_at: '10000000000',
       previous_changes: {
         content_attributes: [{}, { submitted_values: ['yes'] }],
       },