I am a cycling newbie with a 2012 Marin hybrid. Earlier today, after mounting a kerb to avoid an obstacle, the bike developed a clicking/cracking noise. It seems to come from around the steerer or front fork, and occurs whether I'm riding or pushing the bike. The bike was serviced by a Cytech mechanic in May and has run perfectly until now. Could bumping the kerb have precipitated a problem, or is that more likely a coincidence? Any suggests welcome.

IDK , My stem has creaks, it is angle adjustable so has extra moving parts working against each other..

Yours? take your bike to a bike shop and have them look at it , for safety sake.

Try to rule out simple stuff like cable housing hitting the frame when the handlebars move.