Fix typing errors in console.py

[Tridwoxi]

src/briefcase/console.py contained a few type errors according to ty. These have been fixed.

Behaviour changes:

• If Console.close is called more than once on the same instance, the method will do nothing instead of throwing an AttributeError.
• If the exception being captured by Console.capture_stacktrace has attribute skip_logfile yet is not a BriefcaseError, skip_logfile will be ignored. An alternative implementation more amiable to duck typing would be a hasattr + isinstance check.
• If Console.capture_stacktrace is called before an exception has been thrown, it will do nothing instead of throwing an AttributeError (due to implementation details of rich v15.0.0).
• If sys.__stdout__ is None then Console.is_interactive will return False instead of throwing a AttributeError.

I don't think these branches are taken under normal execution, so there should be no runtime impact. Corresponding tests have been added.

PR Checklist:

• I will abide by the BeeWare Code of Conduct
• I have read and have followed the CONTRIBUTING.md file
• This PR was generated or assisted using an AI tool

Assisted-by: Claude Opus 4.7

[freakboy3742]

Thanks for this PR; these all makes sense, except for one flagged inline.

[freakboy3742]

Is there a typing-specific reason for throwing away the exception type and traceback here, and then re-constructing those a couple of lines later for the Traceback construction?

[Tridwoxi]

The 3.10 docs for sys.exc_info() specify:

If no exception is being handled anywhere on the stack, a tuple containing three None values is returned. Otherwise, the values returned are (type, value, traceback).

In the type system, this shows up as tuple[type[BaseException], BaseException, TracebackType] | tuple[None, None, None].

This means once we know the exception value is not None, the exception type is provably not None. Equally correct and more performant:

        exc_type, exc_value, exc_trace = sys.exc_info()
        if exc_value is None:
            return

        if isinstance(exc_value, BriefcaseError):
            self.skip_log = exc_value.skip_logfile

        trace = Traceback.extract(
            exc_type,  # ty:ignore[invalid-argument-type]
            exc_value,
            exc_trace,
            show_locals=True,
        )
        self.stacktraces.append((label, trace))

I'll write this in a moment.