Version: (using KDE Devel) Installed from: Compiled sources in several (all?) places in the khotkeys kcm, the "window details" is a list of entries ... this just does not make sense to me: for conditions, one wants to define separate entries connected with a properly visible operator. for actions, selecting more than one window (usually?) doesn't make sense anyway. btw, the term action is used ambiguously ... for entries in the main list (lets call them complexes) and for the actions performed by generic complexes. this can't be good.
As announced in https://pointieststick.com/2023/07/26/what-we-plan-to-remove-in-plasma-6/ and https://community.kde.org/Plasma/Plasma_6#Removals, I'm afraid KHotKeys has reached end-of-life in Plasma 6. Accordingly, all bug reports and feature requests for it must be closed now. Most of what KHotKeys could do can already be done with the newer KGlobalAccel system in Plasma 6. A few features such as mouse gestures and triggering conditions based on changes to window states are not yet implemented in the new system. These will be added in the future if and when resources materialize for them, and/or when a kind soul submits patches to implement them! :) Meanwhile, the 3rd-party "Mouse Actions" app (https://github.com/jersou/mouse-actions) may be usable for implementing your own mouse gestures again. Thanks for your understanding, everyone.