British Columbia: ID Please for small groundcover "weed" in container

This little guy seems quite robust. Thanks for ID if you know.
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Edit after tentative ID by Vitog: Today I added a third photo, this showing better detail of the very strange leaf shape.
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The plant is a creeper, with a ridged main stem and what I would classify as drunken-lobate leaves.

I'm hoping to get an ID in order to decide whether to remove it from the big pot in which our prized Salmonberry is flourishing. I have three new, tiny 99¢ fuschias from WIG, clamouring for planting-space. Thank you.

The plant "showed up by itself" in a container on our balcony.

 

It's difficult to see what an individual leaf looks like, but they could be Hairy Bittercress, Cardamine hirsuta, or the similar C. oligosperma.

 

@vitog
Thank you so much for your suggested identification. Previously I had no name at all from which to even begin.
—As you mentioned difficulty in seeing the leaf shape, I've added a third photo today, which I placed as an edit in my first post in this thread. A very intriguing leaf shape indeed, when viewed closely.

Is it still Caramine something?

 

Yes, a Cardamine of some kind.

 

Oops. I'd written caraminus the D.
D is now duly noted.

Thank you for your help.