ci: consolidate platform pipelines and test prerequisites on macOS support

MeetingAssistant/MacOs/MacOsMeetingInactivityPromptService.cs

@@ -0,0 +1,30 @@
+using MeetingAssistant.Notifications;
+using MeetingAssistant.Recording;
+
+namespace MeetingAssistant.MacOs;
+
+public sealed class MacOsMeetingInactivityPromptService(DesktopUserRequestStore requests) : IMeetingInactivityPromptService
+{
+    private const string Kind = "meeting-inactivity";
+
+    public Task ShowStopPromptAsync(MeetingInactivityPromptRequest request,
+        Func<MeetingInactivityPromptResponse, CancellationToken, Task> handleResponseAsync,
+        CancellationToken cancellationToken)
+    {
+        requests.Add(new DesktopUserRequestSpec(
+            Kind, "Stop meeting?",
+            $"No transcript text has arrived for {request.InactivityDuration.TotalMinutes:0.#} minutes.",
+            TimeSpan.FromMinutes(1),
+            [new("stop", "Stop"), new("continue", "Continue"), new("pause", "Pause transcription")]),
+            cancellationToken,
+            (action, token) => handleResponseAsync(MeetingInactivityPromptActions.ParseResponse(action), token));
+        return Task.CompletedTask;
+    }
+
+    public Task DismissAllAsync(CancellationToken cancellationToken)
+    {
+        cancellationToken.ThrowIfCancellationRequested();
+        requests.DismissKind(Kind);
+        return Task.CompletedTask;
+    }
+}