Agent status: a checkmark shape for completed

[iatsiuk]

No status shape reads as "done". completed is a green circle by default, and the other shapes suggest something else: a star reads as a favorite, a bell as attention.

A check is the common mark for finished work, as in ✅, ☑️ or ✔️. Could the set get a checkmark shape, in Settings ▸ Agent Status and in session status --shape?

This is not the marked circle dropped in #277: there the check was a knockout inside a filled circle and did not read at row size. Here the check is the whole silhouette. If the plain checkmark symbol looks too light next to the filled shapes, a heavier weight would do.

It is not a request for free-form icons either (#759), just one more entry in the fixed set, as #898 added five. session info with ✅ does not cover it: that is a separate line under the name and does not clear with the status.

[umputun]

added in #947, it will be in the next release. The checkmark shape is in Settings ▸ Agent Status and in agtermctl session status completed --shape checkmark.

SF Symbols has no filled checkmark, so the shape draws the plain check at heavy weight to sit next to the filled ones.