fix(scripts): improve offline resilience and restore missing update scripts

features/scripts/utils/nomarchy-update

@@ -0,0 +1,32 @@
+#!/usr/bin/env bash
+
+# Nomarchy Full Update Script
+# 1. Syncs the local repository (if applicable)
+# 2. Performs a full system update (NixOS + Home Manager)
+
+set -e
+
+# Detect the repository location
+if [ -f "/etc/nixos/flake.nix" ]; then
+    REPO_DIR="/etc/nixos"
+elif [ -f "/etc/nomarchy/flake.nix" ]; then
+    REPO_DIR="/etc/nomarchy"
+else
+    echo "Error: Nomarchy flake repository not found in /etc/nixos or /etc/nomarchy."
+    exit 1
+fi
+
+echo "--- Starting Nomarchy Full Update ---"
+
+# 1. Sync repository if it's a git repo
+if [ -d "$REPO_DIR/.git" ]; then
+    echo "Syncing repository from remote..."
+    if ! git -C "$REPO_DIR" pull --ff-only; then
+        echo "Warning: git pull failed. Proceeding with local configuration."
+    fi
+fi
+
+# 2. System update
+nomarchy-sys-update
+
+echo "--- Nomarchy Full Update Complete ---"