Shopify standard events support for analytics and pixel apps, plus Collection tabs promotion fixes.

Added

• Important: Shopify standard events integration — the theme now publishes 10 standard events (page view, product view, variant select, cart view, cart line/note updates, cart errors, collection view/update, search update) so analytics and pixel apps can track commerce interactions without custom code. Cart discount updates are not published, as the theme has no cart discount-code input (codes are entered at checkout). Zero performance impact: the module loads deferred, cart payloads are reused from existing AJAX responses, and every dispatch is guarded — if the events module fails to load, all store flows run unchanged.