feat: show notification sequence number in upper right (#84)

![](https://gitea.angry.im/attachments/049f819a-b647-4db6-ae3d-6519cf8ff2e9)

Reviewed-on: https://gitea.angry.im/PeterCxy/OpenEUICC/pulls/84


Co-authored-by: septs <github@septs.pw>
Co-committed-by: septs <github@septs.pw>