fix(rofi): route the menu's Apps entry through the launcher theme too

SUPER+Space/D open `rofi -show drun -theme launcher`, but the main menu's
"Apps" entry still ran bare `rofi -show drun`, so that path skipped the
per-theme launcher override (e.g. Boreal's icon grid) and fell back to the
list. Same theme for both launch sites now — consistent launcher whichever
way it's opened.

V0: flake check green; no bare `rofi -show drun` launch sites remain.

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

modules/home/rofi.nix

@@ -700,7 +700,7 @@ ${themeRows}
           row "Keybindings${menuHint "keybinds"}" preferences-desktop-keyboard
         } | rofi -dmenu -show-icons -markup-rows -p Menu) || exit 0
         case "$choice" in
-          *Apps*)        exec rofi -show drun ;;
+          *Apps*)        exec rofi -show drun -theme launcher ;;
           *Look*)        exec "$0" lookfeel ;;
           *Tools*)       exec "$0" tools ;;
           *System*)      exec "$0" system ;;