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.

modules/home/waybar.nix

@@ -204,12 +204,14 @@ let
       # into clock + clock#date — one click surface for the calendar).
       format = "{:%H:%M  ·  %a %d %b}";
       # Left-click → the calendar (nomarchy-calendar → calcurse in a floating
-      # ghostty). Long weekday/month name + zone + month grid ride in the
-      # tooltip so the bar stays compact.
+      # ghostty). Tooltip is plain date/zone only — embedding {calendar}
+      # produced an empty popup on hardware (2026-07-10); month view is
+      # one click away.
       on-click = "nomarchy-calendar";
+      tooltip = true;
       # The zone line stays live under auto-timezone (the tz-watch SIGUSR2
       # reload keeps it showing the currently *detected* zone).
-      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)}";
     };
 
     # Active keyboard layout (per focused device) — only placed in
@@ -503,10 +505,12 @@ in
     );
   };
 
-  # The power-profile helpers on PATH, so both the generated bar and the
-  # whole-swap themes' static waybar.jsonc can exec them by name — plus
-  # the supervisor hyprland.nix exec-onces. calcurse is the clock-click
-  # calendar (feature dependency of the bar, not an opt-in app).
+  # Bar helpers on PATH (whole-swap jsoncs exec them by bare name) +
+  # feature deps of bar clicks: calcurse (clock), pwvucontrol (volume
+  # right-click) — not opt-in template packages.
   home.packages = lib.optionals config.nomarchy.waybar.enable
-    [ waybarSupervisor powerProfileStatus powerProfileCycle vpnStatus doctorStatus calendarLauncher pkgs.calcurse ];
+    [ waybarSupervisor powerProfileStatus powerProfileCycle vpnStatus doctorStatus calendarLauncher
+      pkgs.calcurse
+      pkgs.pwvucontrol
+    ];
 }