Improve the “UV not allowed” error

### Checks

- [x] I have read the Wiki, searched the open issues, and still think this is a new feature.

### Explain the problem clearly and succinctly:

Described in https://github.com/Kunzisoft/KeePassDX/issues/2514

### Describe the solution you'd like:

Add a new dialog box that displays the error along with direct steps to resolve it:

- If the protocol asks for “preferred” :
Title : User Verification preferred
Text : The service you are trying to log in to preferres you to be verified, but you have disabled User Verification for this session. You will be able to log in, but you may be asked to complete additional steps during the authentication.
Button : OK
Button : Don't show this message again

- If the protocol asks for "required"
Title : User Verification required
Text : The service you are trying to log in to requires you to be verified, but you have disabled User Verification for this session. Close your database and log in again with user verification enabled.

### Describe alternatives you've considered:

_No response_

### Additional context:

_No response_

Start with issue 2514 and trace where the “UV not allowed” error is handled in the Android authentication flow. Review existing dialog patterns, then cover the preferred and required cases with the specified titles, text, and buttons; verify both paths and the “don’t show again” behavior.

Written by the indexing model from the issue text.