Feat/theme hook

[robinallezard]

No description provided.

[anoziere]

The theme-hook approach looks right and matches the SEOne/flexy work. Two behavior changes deserve a second look:

• Service/DataLayerProvider.php (renderJsInit): the old code concatenated renderSelectItem() and renderAddToCart() on listing views; the new version returns one template or the other. addToCart.js is no longer loaded on category/brand/search/folder/content/page views, so add/remove cart tracking stops working wherever a listing page has an add-to-cart button.
• Listener/GoogleTagListener.php (trackPurchase): $event->getPlacedOrder()->getId() has no null check, and getSession() throws when there is no request in scope. Payment modules can fire ORDER_PAY from an IPN/webhook context, which would turn a tracking miss into a fatal during payment. Both calls should be guarded.

Minor points: {{ containerId }} in script.html.twig/noscript.html.twig is now HTML-escaped inside a script tag, where the old PHP string was raw, so an unusual configured value would corrupt the emitted JS instead of rendering as before. And gtm_js_init seems to have no remaining caller now that the hook renders it directly; if that's intentional, it could be removed.