docs: harden backup script example

docs/showcase/cli-tools/actor-context-management.md

@@ -737,10 +737,11 @@ layout.
 BACKUP_DIR="$HOME/context-backups/$(date +%Y-%m-%d)"
 mkdir -p "$BACKUP_DIR"
 
-# List all context names
-CONTEXTS=$(ls ~/.cleveragents/context/ 2>/dev/null)
+# Iterate over each context directory safely (handles spaces and special characters)
+for ctx_dir in "$HOME"/.cleveragents/context/*/; do
+    [[ -d "$ctx_dir" ]] || continue
+    ctx=$(basename "$ctx_dir")
 
-for ctx in $CONTEXTS; do
     python -m cleveragents actor context export "$ctx" \
         --output "$BACKUP_DIR/$ctx.json" \
         --format json \