fix(ui): #139 sheets size themselves; #141 waybar clicks stop reading the env

#139 — calcurse/doctor floated full-screen. Two faults stacked, which is
why it looked like the float rules were dead:
  1. Hyprland 0.55.4 silently ignores percentage `size` rules. Matrix on
     hardware (both orders, kitty memory off): `size 60% 65%` never
     applies, `size 1536 936` applies either way, configerrors empty both
     times. Rule order was a red herring.
  2. Kitty defaults to remember_window_size=yes and replays the last OS
     window's size into every float — so after a tiled terminal, a sheet
     opens maximized. This is the Ghostty regression: Ghostty had no such
     memory, so fault 1 stayed invisible until #95.

Fix: remember_window_size=no (floats must be deterministic) and the sheets
ask for their own size — term-sheet.nix reads the focused monitor and
hands kitty the px, because px in a rule cannot mean "a fraction of *this*
screen" and one pair cannot serve 2560x1440 and the 1366x768 Acer (#131).
Those windows keep float/center and deliberately carry no size rule.

#141 — the updates click did nothing: whole-swaps hand-wrote
`sh -c '$TERMINAL …'` and Waybar has no TERMINAL (home.sessionVariables →
login shells only; the bar is spawned by Hyprland). Fixed at the root:
`nomarchy-updates upgrade-window` opens its own window, so all five call
sites name one env-free command and a theme file stops having an opinion
about terminals. checks.waybar-swap-env guards the class.

Bernardo asked mid-task for the update window to float — it is now the
third caller of the sheet helper (com.nomarchy.updates, 45%x50%).

V3 on the dev box: calendar 1536x936, doctor 1408x1008, updates 1152x720
— exactly the intended fractions, floating and centred; #141 driven under
`env -i` with no TERMINAL, matching Waybar's real environment; the guard
proven by reintroducing the bug. Acer V3 queued.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

modules/home/rofi.nix

@@ -11,6 +11,7 @@ let
   cfg = config.nomarchy;
   t = cfg.theme;
   c = t.colors;
+  termSheet = import ./term-sheet.nix { inherit pkgs; };
   inherit (config.lib.formats.rasi) mkLiteral;
 
   px = n: mkLiteral "${toString n}px";
@@ -1043,9 +1044,10 @@ ${themeRows}
       doctor)
         # Read-only health sheet in a floating, centered kitty window
         # (class matched by hyprland.nix windowrules). Same pattern as
-        # nomarchy-calendar. Exit code doesn't matter; the sheet is the product.
-        exec kitty --class=com.nomarchy.doctor \
-          -e sh -c "nomarchy-doctor
+        # nomarchy-calendar, sizing itself for the same reason (#139).
+        # Exit code doesn't matter; the sheet is the product.
+        exec ${termSheet}/bin/nomarchy-term-sheet com.nomarchy.doctor 55 70 \
+          sh -c "nomarchy-doctor
             printf '\nEnter to close.'; read -r _" ;;
 
       firmware)