Keyboard shortcut for "Copy mailbox permalink" feature

Hi! Is there any way to map shortcut to the feature ("Copy mailbox permalink), so I can process my inbox without using trackpad - keyboard only?
Thank you for your help!

Context:
I use mailspring only for my mailing routine. I have chosen it recently as only fine, os and free mail client available for macos - and mostly because of the permalink feature.
I follow zero inbox approach, which is, as far as I get, about cleaning email for one run, storing long term tasks to task tracker.
So I get permalink for email containing some task to do and attach it to my task tracker, so I can come back later without wasting time on search.
But it seems the feature is only has no keyboard shortcut, so I do all actions with keyboard and have to use trackpad for the opening context menu and pressing it’s button.

It already has one — Ctrl+L (literally the Control key, also on macOS) copies the mailbox permalink of the conversation you have open. It’s the same command as Thread > Copy mailbox permalink in the menu bar, so you can confirm it’s wired up there.

It isn’t in the Preferences > Shortcuts list, but you can rebind it by clicking Edit custom shortcuts at the bottom of that tab and adding a line to keymap.json, for example:

{ "core:copy-mailbox-link": "mod+shift+l" }

Save the file and Mailspring picks it up immediately. Details on the format: Learn and customize keyboard shortcuts — Mailspring Documentation