[dotnet watch] Fix target framework selector being stuck

[jonathanpeppers]

Testing dotnet-watch end-to end on a dotnet new maui project:

I found the Spectre.Console input was just "stuck", neither up/down arrows or typing to search did anything!

PhysicalConsole runs Console.ReadKey() in a tight background loop, consuming all key presses and dispatching them via the KeyPressed event. When SpectreBuildParametersSelectionPrompt returned AnsiConsole.Console for non-redirected stdin, Spectre.Console would also call Console.ReadKey() internally, creating a race where PhysicalConsole steals every key press and the selection prompt appears completely stuck (arrow keys, typing, and search all do nothing).

Fix by always using KeyPressedAnsiConsole, which reads keys from PhysicalConsole.KeyPressed events instead of competing for Console.ReadKey(). This ensures a single key reader (PhysicalConsole) distributes keys to all consumers including Spectre.Console.

[Copilot]

Pull request overview

Fixes dotnet watch interactive selection prompts (target framework / device) becoming unresponsive by ensuring Spectre.Console reads keystrokes via PhysicalConsole’s KeyPressed event stream rather than competing with a second Console.ReadKey() loop.

Changes:

• Removes the conditional that returned AnsiConsole.Console when stdin isn’t redirected.
• Always constructs a Spectre console wrapper (KeyPressedAnsiConsole) that sources input from IConsole.KeyPressed.

Comments suppressed due to low confidence (1)

src/Dotnet.Watch/dotnet-watch/UI/SpectreBuildParametersSelectionPrompt.cs:88

• CreateConsole now forces AnsiSupport.Yes and sets Profile.Capabilities.Ansi/Interactive = true for all runs. That bypasses Spectre.Console’s normal capability detection (e.g., output redirection / NO_COLOR / terminals without ANSI), and can lead to escape sequences or interactive prompting in contexts where the default AnsiConsole.Console would correctly downgrade. Consider keeping auto-detection for ANSI/output and only swapping the input source (wrap AnsiConsole.Console and override Input, and only force Interactive when you specifically need to override redirected-stdin behavior).

        var ansiConsole = AnsiConsole.Create(new AnsiConsoleSettings
        {
            Ansi = AnsiSupport.Yes,
            Interactive = InteractionSupport.Yes,
        });
        ansiConsole.Profile.Capabilities.Interactive = true;
        ansiConsole.Profile.Capabilities.Ansi = true;
        return new KeyPressedAnsiConsole(ansiConsole, watchConsole);