Article share and trash notifications now display more cleanly by removing an unnecessary blank line and background styling. This improves readability, especially for users viewing notifications in dark mode.

For the "share" and "send to trash" article notifications, remove the extra blank line and the white background which was preventing a good display in dark mode.

Task-4273407

This update reorganizes how Odoo loads interface template assets by separating XML bundles from JavaScript bundles. The change supports cleaner asset management and should make future maintenance and performance work easier without changing day-to-day business workflows.

Related to https://github.com/odoo/odoo/pull/161254