PlasmaZones 2.8.6

Fixed

• Emby and other Electron/CEF apps silently break after class rename (#271): The daemon’s runtime primary key was "appId|uuid", a composite that baked a mutable attribute into the identity used for every per-window map. Emby opens as emby-beta, gets tracked, then KWin rebroadcasts it as media.emby.client.beta. Every subsequent lookup under the new composite missed, so toggleWindowFloat, focus navigation, and snap operations silently failed until a mode toggle rebuilt state from scratch. Introduced WindowRegistry as the single source of truth for live-window metadata keyed by the stable KWin instance id. The kwin-effect pushes class/desktop-file/title on windowAdded and on every windowClassChanged / desktopFileNameChanged / captionChanged so the daemon always reads the live class instead of parsing a frozen first-seen composite. Session persistence uses currentAppIdFor() at save time so a renamed window lands under its live class on disk.