feat: Wave A — boot DRM wait, D-Bus login1, Wayland wire fixes

Boot: greeter DRM wait window, pcid-spawner ordering, plan updated
D-Bus: sessiond login1 manager extension (GetUser, ActivateSessionOnSeat,
 lock/unlock, terminate/kill), KDE activation files (ActivityManager,
 JobViewServer, ksmserver), plan v3.0
Wayland: proper little-endian/padded strings, SCM_RIGHTS fd passing,
 xdg_toplevel.configure fix, compositor-checker protocol probes

Verified: bash -n, TOML parsed, sessiond 30/30 tests, compositor all tests
pass w/ warnings denied.

local/recipes/kde/kf6-kio/recipe.toml

@@ -1,7 +1,8 @@
 # KIO — reduced real KIOCore build for Red Bear OS.
 #
 # Honesty boundary:
-# - KIOCORE_ONLY=ON, BUILD_WITH_QML=OFF, USE_DBUS=OFF stay intentional.
+# - KIOCORE_ONLY=ON and BUILD_WITH_QML=OFF stay intentional.
+# - USE_DBUS=ON is now enabled to expose more real KIOCore functionality.
 # - QtNetwork is still unavailable on Redox, so KIOCore uses source-local
 #   Redox compatibility headers for the small QHostInfo/QHostAddress surface it needs.
 # - This recipe no longer forges QtNetwork headers into the shared sysroot.
@@ -17,6 +18,7 @@ dependencies = [
     "kf6-kcoreaddons",
     "kf6-kconfig",
     "kf6-ki18n",
+    "kf6-kdbusaddons",
     "kf6-kjobwidgets",
     "kf6-kservice",
     "kf6-kbookmarks",
@@ -62,7 +64,7 @@ cmake "${COOKBOOK_SOURCE}" \
     -DQT_SKIP_AUTO_PLUGIN_INCLUSION=ON \
     -DKIOCORE_ONLY=ON \
     -DBUILD_WITH_QML=OFF \
-    -DUSE_DBUS=OFF \
+    -DUSE_DBUS=ON \
     -DWITH_X11=OFF \
     -Wno-dev