The connection dialog for the POSBox homepage now shows two simpler steps for connecting to a database. This makes setup easier to understand and reduces confusion for users during configuration.

Inside the dialog used to connect to a database, the instruction were confusing. They have been simplified to 2 basic instructions, easy to follow.

Task: 4585446

![image](https://github.com/user-attachments/assets/df021aa0-4280-4490-8c68-440c26dda0db)

The live chat widget now marks the page when the chat button is visible to visitors. This small improvement makes it easier to adapt styling or behavior based on whether chat is available, without changing the visitor experience.

This PR introduces a class on the livechat-root element when livechat button is displayed to the visitor.

task-4567743

WhatsApp conversations will no longer show an unnecessary system message when a chatbot leaves the chat. This keeps customer conversation histories clearer and reduces noise for agents reviewing or continuing the discussion.

task-4410808


community: https://github.com/odoo/odoo/pull/197583