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/hyprland.nix

@@ -1060,16 +1060,22 @@ in
 
         # Calendar popup (item 42): nomarchy-calendar → calcurse in a
         # kitty window tagged with a distinct --class, so it floats centered.
+        # No `size` rule on purpose: a percentage one is silently ignored here
+        # (#139, measured on hardware — see term-sheet.nix), and px cannot mean
+        # "a fraction of *this* monitor". The launcher sizes the window itself.
         "float 1, match:class ^(com\\.nomarchy\\.calendar)$"
-        "size 60% 65%, match:class ^(com\\.nomarchy\\.calendar)$"
         "center 1, match:class ^(com\\.nomarchy\\.calendar)$"
 
         # Doctor sheet (System › Doctor / Waybar custom/doctor click):
-        # nomarchy-menu doctor → kitty --class=com.nomarchy.doctor.
+        # nomarchy-menu doctor → nomarchy-term-sheet, sized the same way.
         "float 1, match:class ^(com\\.nomarchy\\.doctor)$"
-        "size 55% 70%, match:class ^(com\\.nomarchy\\.doctor)$"
         "center 1, match:class ^(com\\.nomarchy\\.doctor)$"
 
+        # Upgrade prompt (Waybar custom/updates click → nomarchy-updates
+        # upgrade-window): the same classed sheet, smaller — it is a y/N flow.
+        "float 1, match:class ^(com\\.nomarchy\\.updates)$"
+        "center 1, match:class ^(com\\.nomarchy\\.updates)$"
+
         # Polkit auth (hyprpolkitagent — app id / binary name in the package)
         # and pinentry-qt (keys.nix default; org.gnupg.pinentry-qt desktop).
         # workspace current: agent was started on ws1 at login; without this