feat(menu): open Doctor in a floating centered terminal

Launch nomarchy-doctor via ghostty --class=com.nomarchy.doctor (same
pattern as the calendar popup) and match float/size/center windowrules
so System › Doctor and the Waybar doctor click no longer tile.

Verified: V1 — downstream-template-home builds; menu carries the class;
hyprland.conf has float/size/center for com.nomarchy.doctor;
windowrule-syntax green (19 rules). V2 live float confirm after
nomarchy-home (same class mechanism as calendar).

modules/home/hyprland.nix

@@ -491,6 +491,12 @@ in
         "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 → ghostty --class=com.nomarchy.doctor.
+        "float 1, match:class ^(com\\.nomarchy\\.doctor)$"
+        "size 55% 70%, match:class ^(com\\.nomarchy\\.doctor)$"
+        "center 1, match:class ^(com\\.nomarchy\\.doctor)$"
+
         # 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

modules/home/rofi.nix

@@ -801,10 +801,13 @@ ${themeRows}
         exec ${cfg.terminal} -e sudo nomarchy-snapshots ;;
 
       doctor)
-        # Read-only health sheet in a terminal; exit code doesn't matter
-        # here — the sheet itself is the product.
-        exec ${cfg.terminal} -e sh -c "nomarchy-doctor
-          printf '\nEnter to close.'; read -r _" ;;
+        # Read-only health sheet in a floating, centered ghostty window
+        # (class matched by hyprland.nix windowrules). --gtk-single-instance
+        # =false forces a fresh window — same pattern as nomarchy-calendar.
+        # Exit code doesn't matter; the sheet itself is the product.
+        exec ghostty --class=com.nomarchy.doctor --gtk-single-instance=false \
+          -e sh -c "nomarchy-doctor
+            printf '\nEnter to close.'; read -r _" ;;
 
       firmware)
         # System ▸ Firmware — fwupd/LVFS update surface (HARDWARE.md §4).