Load css first (#47)

* Wait for css to load to show webchat.

* Display errors when messages can't be sent.

* Fix webchat quick replies, teaser refresh, and open animation

- Allow plain quick reply buttons to send messages without product card data
- Scope teaser session visibility to the rendered teaser version
- Add a transient opening class so popover animation only runs when opening
- Update generated lib and dist builds
- Add tests for quick replies, teaser versioning, and popover open animation

* Infer the webchat ActionCable URL from the configured API root when no explicit cable URL is provided. This keeps local and custom API environments connected to the matching websocket endpoint while preserving explicit actionCableUrl overrides.

* Speed up webchat header minimize animation.

* Minimize timeout to close webchat.

* Close webchat immediately from header clicks

* Make webchat header close immediately.

* Improve ESC key behavior.

* 2.4.2

* Add arrows to scroll carousels.

* Use configured locale for webchat timestamps

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Co-authored-by: Martin Caetano <martin.caetano@icloud.com>