fix(archsetup): install fontconfig and dconf before calling them

The 2026-05-11 VM test surfaced three exit-127 / "dbus-launch returned 1" errors very early in the run: `fc-cache` and the two `dconf` writes in `user_customizations()`. The function runs as step 4 of 13 (before `aur_installer`, the DE step, and most of the package installs), so the binaries the function calls are not on PATH yet.

I added `pacman_install fontconfig` and `pacman_install dconf` right before their use, mirroring the existing `pacman_install desktop-file-utils` pattern in the same function. Both are idempotent. Verified by `bash -n`. The next `make test` run confirms the behavior in the VM.

1 files changed, 6 insertions, 0 deletions

diff --git a/archsetup b/archsetup
index 336ba28..e7739ff 100755
--- a/archsetup
+++ b/archsetup
@@ -865,6 +865,9 @@ user_customizations() {
         fi
     fi
 
+    # install fontconfig before refreshing cache (provides fc-cache)
+    pacman_install fontconfig
+
     # Refresh font cache for any fonts in dotfiles
     action="refreshing font cache" && display "task" "$action"
     fc-cache -f >> "$logfile" 2>&1 || error_warn "$action" "$?"
@@ -877,6 +880,9 @@ user_customizations() {
     (sudo -u "$username" update-desktop-database "/home/$username/.local/share/applications" \
                                 >> "$logfile" 2>&1 ) || true
 
+    # install dconf before writing GTK/GNOME desktop settings (provides dconf)
+    pacman_install dconf
+
     # GTK file chooser settings (stored in dconf, can't be stowed)
     action="configuring GTK file chooser" && display "task" "$action"
     (sudo -u "$username" dbus-launch dconf write /org/gtk/settings/file-chooser/sort-directories-first true \