This update adjusts an internal automated test for project planning so it no longer fails during nightly validation runs. It helps keep release checks reliable without changing customer-facing behavior.

This commit increases the assertQueryCount of the test in order to prevent
runbot Nightly build test fail.

The VoIP calling panel now sets up its error handling before starting the phone connection process. This helps ensure setup problems are caught and handled properly, reducing confusing failures when users start VoIP calling.

Errors triggered during the initialization of the user agent using `sip_error` are not caught since the event listeners have not yet been added.

This commit solves the issue by moving the instanciation of the UserAgent after the event listeners have been added.

This update removes leftover styling markers that were preventing some icons from displaying correctly in the Enterprise web interface. Users should now see the intended icons in affected control panel and search areas, improving visual consistency without changing workflows.

During 28f910f some `oi` utility-classes that were supposed to be
removed have been forgotten, causing `fa` icons to don't be rendered
properly.

This commit will remove the unnecessary classes solving the render
issues.

task-2790138

community:
- https://github.com/odoo/odoo/pull/86102

This update adjusts how approval, messaging, and VoIP activity features are registered and loaded. It should make these features more reliable internally, with limited visible impact for everyday users.