Add a color picker to the session menu (an Appearance submenu of reusable
ColorSwatches, in both the dropdown and right-click flavors). The pick is a
per-session override that wins over the inherited project color; clearing
falls back to it.
Storage is desktop-local like pins ($sessionColorOverrides persistentAtom),
keyed by the DURABLE lineage id so a color survives auto-compression's id
rotation. Precedence folds into the existing $sessionColorById resolver, so
sidebar rows AND pane tabs pick it up with no changes to either — the payoff
of the shared store. To take this to the TUI later, promote this one atom to
a backend SessionInfo.color field; the resolver and picker stay put.
brooklyn!
0d2ad3993e