omarchy-wifi-powersave: nullglob; plocate drop-in daemon-reload; idempotent legacy cleanup

- bin/omarchy-wifi-powersave: shopt -s nullglob. Previously, machines
  with no wireless interfaces ran the loop once with the literal glob
  ('iface=*'), failed iw, and exited 237. With the new always-installed
  udev rule that invokes this on every AC transition, the failure
  would surface as failed transient omarchy-wifi-powersave-* units on
  desktops. Now it cleanly no-ops.
- migrations/1779307845.sh: add 'systemctl daemon-reload' so the
  plocate-updatedb.service.d/ac-only.conf drop-in is picked up on
  upgrade. Arch's systemd pacman hook only triggers on
  /usr/lib/systemd/system/*, not /etc/systemd/system/*.
- install/config/powerprofilesctl-rules.sh and wifi-powersave-rules.sh:
  rm -f the pre-rename legacy paths before udevadm reload, so the
  cleanup is idempotent outside the one-shot migration (matters for
  re-install/downgrade testing).

migrations/1779307845.sh

@@ -9,6 +9,11 @@ sudo rm -f /etc/udev/rules.d/99-power-profile.rules
 # Package now ships /etc/udev/rules.d/99-omarchy-wifi-powersave.rules. Same.
 sudo rm -f /etc/udev/rules.d/99-wifi-powersave.rules
 
-# Reload so the new rules take effect immediately.
+# Reload so the new udev rules take effect immediately.
 sudo udevadm control --reload 2>/dev/null
 sudo udevadm trigger --subsystem-match=power_supply 2>/dev/null
+
+# The plocate-updatedb.service drop-in is installed under /etc/systemd/system,
+# which Arch's systemd pacman hook does NOT trigger on. Explicitly reload so
+# upgrades pick up the drop-in without needing a reboot.
+sudo systemctl daemon-reload 2>/dev/null