feat: Add backup and security hardening

scripts/backup-setup/_backup-setup

@@ -0,0 +1,44 @@
+#compdef backup-setup
+
+# ZSH completion for backup-setup
+# Installation: Copy to /usr/local/share/zsh/site-functions/_backup-setup
+
+_backup-setup() {
+  local -a commands backup_types
+
+  commands=(
+    'status:Show backup status and last backup time'
+    'backup:Trigger a backup'
+    'list:List available backups on NAS'
+    'logs:View recent backup logs'
+    'test:Test NAS connection'
+    'help:Show help message'
+  )
+
+  backup_types=(
+    'full:Full system backup (excludes caches, tmp, build dirs)'
+    'home:Home directory backup only'
+    'incremental:Incremental backup (space-efficient)'
+    'configs:Configuration files backup (lightweight)'
+  )
+
+  _arguments -C \
+    '1:command:->command' \
+    '2:backup-type:->backup_type' \
+    && return 0
+
+  case $state in
+    command)
+      _describe -t commands 'backup-setup command' commands
+      ;;
+    backup_type)
+      if [[ ${words[2]} == "backup" ]]; then
+        _describe -t backup_types 'backup type' backup_types
+      fi
+      ;;
+  esac
+
+  return 0
+}
+
+_backup-setup "$@"