fix(desktop): hardware findings — charge limit, polkit ws, bar deps

Latitude 5310 QA:
- Clock tooltip: drop empty {calendar} popup; plain date+zone
- Charge limit: restart oneshot via polkit + dual write/delay for
  Dell unplug race; toast verifies sysfs; looser menu match
- pwvucontrol ships with waybar (right-click volume)
- Print/region→clipboard toasts success
- Polkit (and pinentry) open on current workspace + stayfocused

V0: flake check --no-build green. V3: retest A3/A4/B1/tooltip/polkit.

themes/executive-slate/waybar.jsonc

@@ -47,7 +47,7 @@
     "format": "{:%H:%M  ·  %a %d %b}",
     "on-click": "nomarchy-calendar",
     "tooltip": true,
-    "tooltip-format": "{:%A %d %B %Y}\n{:%Z (UTC%z)}\n<tt><small>{calendar}</small></tt>"
+    "tooltip-format": "{:%A, %d %B %Y}\n{:%Z (UTC%z)}"
   },
   "custom/recording": {
     "return-type": "json",