Use existing mechanism

bin/omarchy-refresh-shell

@@ -3,15 +3,4 @@
 # omarchy:summary=Reset shell.json to Omarchy defaults
 # omarchy:examples=omarchy refresh shell
 
-set -e
-
-USER_CONFIG="$HOME/.config/omarchy/shell.json"
-
-# Removing the user file lets the running shell fall back to shell-defaults.json
-# via its FileView watcher. The next shell start will also use the defaults.
-if [[ -f $USER_CONFIG ]]; then
-  backup="$USER_CONFIG.bak.$(date +%s)"
-  cp "$USER_CONFIG" "$backup"
-  echo "Backed up user shell config to $backup"
-  rm -f "$USER_CONFIG"
-fi
+omarchy-refresh-config omarchy/shell.json