Fix collection manager JavaScript errors after attribute naming changes

- Update collection manager to use data-collection-id instead of data-content-id
- Add safety checks to prevent undefined Map access in addItemControls
- Add validation in editor to only initialize collections with valid collection IDs
- Resolves TypeError and missing attribute errors in frontend collection management

lib/package-lock.json

@@ -311,6 +311,7 @@
       "integrity": "sha512-GVsDdsbJzzy4S/v3dqWPJ7EfvZJfCHiDqe80IyrF59LYuP+e6U1LJoUqeuqRbwAWoMNoXivMNeNAOf5E22VA1w==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "bin": {
         "rollup": "dist/bin/rollup"
       },