b1553f4073
Complete the org.freedesktop.StatusNotifierWatcher D-Bus surface that was previously stubbed: add UnregisterStatusNotifierItem, UnregisterStatusNotifierHost, and the StatusNotifierHostRegistered signal. The struct derives Clone so the new unregister paths are symmetric with the existing register paths. 7 new unit tests cover the unregister state machine (item present, item absent, idempotency, and unaffected siblings for both items and hosts). 12 tests pass total for statusnotifierwatcher. Also remove a stale TODO from kf6-kglobalaccel recipe.toml. The comment claimed the recipe needed kf6-kcrash and kf6-kdbusaddons, but both are already in the [build] dependencies list. DBUS-PLAN bumped to v3.6 (2026-07-26). Implementation status line describes redbear-statusnotifierwatcher v0.2 with the expanded D-Bus surface and 12 unit tests. Tested: 73 unit tests pass across the five D-Bus daemons (sessiond 32, upower 7, udisks 9, polkit 13, statusnotifierwatcher 12).