fix: restart Dock/Finder/SystemUIServer after mackup restore

Mackup restores com.apple.dock.plist and other UI preference files, but
the running Dock/Finder processes don't reload them automatically. Add
ssr::macos::restart_ui (killall cfprefsd Dock Finder SystemUIServer + 2s
settle) called immediately after the mackup restore step so the Dock
layout and Finder settings take effect without requiring a logout.

Co-authored-by: Cursor <cursoragent@cursor.com>

lib/macos.sh

@@ -33,6 +33,19 @@ ssr::macos::disable_gatekeeper() {
     sudo spctl --global-disable
 }
 
+# Restart macOS UI services that read preference files restored by Mackup.
+# Called after mackup restore so Dock/Finder/menubar pick up the new plists.
+ssr::macos::restart_ui() {
+    ssr::log "Restarting UI services (Dock, Finder, SystemUIServer, cfprefsd)"
+    local svc
+    for svc in cfprefsd Dock Finder SystemUIServer; do
+        killall "$svc" 2>/dev/null || true
+    done
+    # Brief pause so cfprefsd flushes its cache before Dock re-reads prefs.
+    sleep 2
+    ssr::ok "UI services restarted — Dock and Finder will refresh."
+}
+
 ssr::macos::open_installed_casks() {
     [[ "${SSR_OPEN_CASKS:-false}" == "true" ]] || return 0
     local cask_dir