## Description
The Microsoft authorize URL had no `prompt` parameter. With Microsoft's
default behavior, a browser carrying an active Microsoft session is
silently signed in to that account. If the same account is already
attached to an inbox in the same Chatwoot account, the callback treats
the OAuth response as a re-auth and routes the user to the existing
inbox settings page instead of letting them create the new inbox they
intended.
Adding `prompt=select_account` interrupts SSO and always presents the
Microsoft account picker, so the user explicitly chooses the mailbox
they want to connect.
This is distinct from `prompt=consent`, which was removed in
[#13962](https://github.com/chatwoot/chatwoot/pull/13962) to fix the
admin consent loop. `select_account` only interrupts SSO and does not
retrigger the consent dialog.
Closes INF-76
## Type of change
- [x] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality not to work as expected)
- [ ] This change requires a documentation update
## How Has This Been Tested?
`bundle exec rspec
spec/controllers/api/v1/accounts/microsoft/authorization_controller_spec.rb`
(3 examples, 0 failures). The regression test introduced in
[#13962](https://github.com/chatwoot/chatwoot/pull/13962) is updated to
assert `prompt=select_account` instead of asserting absence of the
parameter.
## Checklist:
- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [x] I have commented on my code, particularly in hard-to-understand
areas
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [x] I have added tests that prove my fix is effective or that my
feature works
- [x] New and existing unit tests pass locally with my changes
- [x] Any dependent changes have been merged and published in downstream
modules
