Bulk Customer Tagging

Hey! Loving MGR so far — just two small feature requests around tagging:

1. Bulk tagging on the customer list — would be great to select multiple customers and tag them at once, instead of one by one.

2. Easier tagging on the customer detail page — right now you have to click "Edit Customer" to add/change tags. An inline tag editor directly on the detail page would be much faster.

Both would really speed up customer organization. Thanks! 🙌