[I don't actually know if this is maniphest or harbormaster or what]
I got an email recently due to changes in a task I am following (T5781):
epriestley added a revision: D10346: Fix `arc browse path:line`.
And later another email:
epriestley added a commit: rARCe336b04aa10b: Fix `arc browse path:line`.
Neither of these were links, but both of them could have been! Then I could have clicked from the email to see the revision and/or the commit. As it is, it's now a two-step process to click on the T5781 link, and then click on the D10346 link (or rARCe33... link) from the task webpage.