updated scripts: better warn messages, added/updated dotfiles

run_once_50-configure-user.sh.tmpl

@@ -5,6 +5,8 @@
 
 set -euo pipefail
 
+warn() { echo ">>> [configure-user] WARNING: $*" >&2; }
+
 if ! command -v fish >/dev/null 2>&1; then
     echo ">>> [configure-user] fish not installed; skipping"
     exit 0
@@ -19,4 +21,4 @@ if [ "$current_shell" = "$(command -v fish)" ]; then
 fi
 
 echo ">>> [configure-user] changing shell for $USER_NAME to $(command -v fish)"
-sudo chsh -s "$(command -v fish)" "$USER_NAME" || true
+sudo chsh -s "$(command -v fish)" "$USER_NAME" || warn "chsh failed for $USER_NAME (may need /etc/shells entry)"