This update enhances the accuracy of account reconciliation by validating the use of 'integer' and 'fraction' groups within regular expressions. Previously, inconsistencies in these groups could lead to incorrect amount formatting, particularly with formats like CODA files. Now, the system enforces that both groups are present when defined, providing clearer error messages to guide users.

When using a regular expression to extract amounts from a label, especially for formats without a decimal separator (like CODA files), the logic now supports and validates the use of named groups 'integer' and 'fraction'.

This commit ensures that:
- If 'integer' is defined, 'fraction' must also be present to correctly format the decimal value.
- If 'fraction' is defined, 'integer' must be present.
- Meaningful UserErrors are thrown to guide the user when one group is missing.

Enterprise PR: odoo/enterprise#103630

Task [link](https://www.odoo.com/odoo/project.task/5449413)
task-5449413

Forward-Port-Of: odoo/odoo#242750

This update adds a notification to the Odoo interface when a user adds or removes a channel as a favorite. This enhances the user experience by providing immediate feedback on channel management actions, making it easier for users to track and manage their preferred channels within the system. This improves channel organization and streamlines user workflows.

Task-5867464 point 84