Declare the 24 hand-installed blankpad packages the manifest was missing

The point of the new inventory tool is this commit: packages/blankpad.pkgs declared one package
while the machine had 24 more that no rebuild would reproduce. Declaring them changes nothing on
the running box (install.sh installs only what is missing — its delta is now empty) and makes a
fresh install faithful to this one.

nirimod-git is left undeclared on purpose: it is AUR-only and aur.pkgs is fleet-wide, so declaring
it there would make the headless servers build a niri module.

Refs #51

packages/blankpad.pkgs

@@ -3,3 +3,35 @@
 # pkgbase amd-ucode (split pkgname amd-ucode). No module options needed.
 
 amd-ucode
+
+# Hand-installed additions, measured by scripts/pkg-inventory.sh on 2026-10-20 against the
+# Calamares install day (baseline 2026-09-07). These stay out of common.pkgs: none of them belong
+# on the headless servers. install.sh installs them only where they are missing, so this list
+# changes nothing on the running box — it is what makes the next rebuild faithful.
+bun
+cachyos-gaming-applications
+curlftpfs
+flatpak
+fuse2
+fuseiso
+ghostty-nautilus
+glow
+gnome-calculator
+gnome-disk-utility
+nodejs
+npm
+obsidian
+partitionmanager
+plezy
+proton-mail-bin
+python-yaml
+quickshell
+shelly-flatpak-backend
+sshfs
+tmux
+ttf-proggyclean-nerd
+ttf-terminus-nerd
+wine-cachyos
+
+# nirimod-git is an AUR addition deliberately left undeclared: aur.pkgs is read by every host, and
+# a niri module must not be built on the servers. See the known gap in omp-docs/tools/packages.md.