Fail to delete I-Note

[yanlin-tao]

When deleting an I-Note, the frontend dispatches epub/deleteEPub with a string payload, but the thunk expects an object shape ({ ePubId }).
The deletion fails.

Steps to Reproduce

1. Open an I-Note
2. Click Delete and confirm.
3. FrontEnd shows failure to delete (Observe request returns 404 in the Network Tab)