Background gvfs restart to avoid blocking user.slice thaw

The post-sleep hook runs before systemd thaws user.slice, so a
synchronous systemctl --user restart hangs for ~90 seconds waiting
for the frozen user manager to respond — blocking the entire resume.

Background the restart with a short delay so it executes after
user.slice is thawed.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

default/systemd/system-sleep/unmount-fuse

@@ -14,13 +14,18 @@ if [[ $1 == "pre" ]]; then
 fi
 
 if [[ $1 == "post" ]]; then
-  for uid_dir in /run/user/*; do
-    uid=$(basename "$uid_dir")
-    if [[ -S $uid_dir/bus ]]; then
-      sudo -u "#$uid" \
-        DBUS_SESSION_BUS_ADDRESS="unix:path=$uid_dir/bus" \
-        XDG_RUNTIME_DIR="$uid_dir" \
-        systemctl --user restart gvfs-daemon.service 2>/dev/null || true
-    fi
-  done
+  # Run in background — user.slice is still frozen at this point, so a
+  # synchronous restart would block the thaw for up to 90 seconds.
+  (
+    sleep 5
+    for uid_dir in /run/user/*; do
+      uid=$(basename "$uid_dir")
+      if [[ -S $uid_dir/bus ]]; then
+        sudo -u "#$uid" \
+          DBUS_SESSION_BUS_ADDRESS="unix:path=$uid_dir/bus" \
+          XDG_RUNTIME_DIR="$uid_dir" \
+          systemctl --user restart gvfs-daemon.service 2>/dev/null || true
+      fi
+    done
+  ) &
 fi