Show exact timestamp for alerts too

[filippog]

Hi @prymitive,
thank you for your work on Karma!

I like the human readable date/time indication for alerts (e.g. 1 day ago); some times when investigating alerts I also find it useful to know the exact timestamp. To avoid clutter I'm thinking it could be a tooltip shown on hover of the timestamp, what do you think ?

thank you!

[github-actions]

This issue has been automatically marked as stale because it has not had
recent activity. It will be closed if no further activity occurs. Thank you
for your contributions.

[filippog]

Not stale, waiting for feedback

[baryluk]

I think it would be really useful to have a tooltip with ISO 8601 like timestamp with seconds resolution ("2023-01-10 02:04:25 UTC"), and even better show both UTC and local (browser) timezone as two line.

When communicating with others, or building reports, it is often very desirable to pinpoint the times of events quickly. I know all this can be extracted from ALERTS_* metrics in Prometheus, but it is just more steps, and not actually the time the alertmanager received it.