Preserve recovery transcripts and add user-approved agent requests

Append successful offline recovery with a duplicate-warning marker and retain failed replay sources. Offer newly available microphones through confirmation notifications.

Add project discovery metadata and blocking association approval, plus nonblocking workflow requests that start a separate settings-agent conversation. Include regression tests, OpenSpec changes, and verified local Release startup.

MeetingAssistant/Notifications/AgentApprovalService.cs

@@ -0,0 +1,56 @@
+namespace MeetingAssistant.Notifications;
+
+public sealed record AgentApprovalPrompt(string Title, string Message, TimeSpan Timeout);
+
+public interface IAgentApprovalPromptService
+{
+    Task<bool> ConfirmAsync(AgentApprovalPrompt prompt, CancellationToken cancellationToken);
+}
+
+public sealed class NoopAgentApprovalPromptService : IAgentApprovalPromptService
+{
+    public Task<bool> ConfirmAsync(AgentApprovalPrompt prompt, CancellationToken cancellationToken) => Task.FromResult(false);
+}
+
+public sealed class AgentApprovalService
+{
+    private readonly IAgentApprovalPromptService prompts;
+    private readonly ILogger<AgentApprovalService> logger;
+    private readonly TimeSpan timeout;
+
+    public AgentApprovalService(IAgentApprovalPromptService prompts, ILogger<AgentApprovalService> logger)
+        : this(prompts, logger, TimeSpan.FromMinutes(10)) { }
+
+    internal AgentApprovalService(IAgentApprovalPromptService prompts, ILogger<AgentApprovalService> logger, TimeSpan timeout)
+    {
+        this.prompts = prompts;
+        this.logger = logger;
+        this.timeout = timeout;
+    }
+
+    public async Task<bool> ConfirmAsync(string title, string message, CancellationToken cancellationToken)
+    {
+        using var deadline = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken);
+        deadline.CancelAfter(timeout);
+        try
+        {
+            var accepted = await prompts.ConfirmAsync(new AgentApprovalPrompt(title, message, timeout), deadline.Token)
+                .WaitAsync(deadline.Token);
+            cancellationToken.ThrowIfCancellationRequested();
+            return accepted && !deadline.IsCancellationRequested;
+        }
+        catch (OperationCanceledException) when (!cancellationToken.IsCancellationRequested)
+        {
+            return false;
+        }
+        catch (Exception exception) when (exception is not OperationCanceledException)
+        {
+            logger.LogWarning(exception, "Could not obtain user approval for {Title}", title);
+            return false;
+        }
+        finally
+        {
+            await deadline.CancelAsync();
+        }
+    }
+}

MeetingAssistant/Notifications/WindowsAgentApprovalPromptService.Windows.cs

@@ -0,0 +1,85 @@
+#if WINDOWS
+using System.Collections.Concurrent;
+using CommunityToolkit.WinUI.Notifications;
+using MeetingAssistant.Recording;
+
+namespace MeetingAssistant.Notifications;
+
+public sealed class WindowsAgentApprovalPromptService(ILogger<WindowsAgentApprovalPromptService> logger)
+    : IAgentApprovalPromptService, IDisposable
+{
+    private const string Source = "summary-agent-approval";
+    private readonly ConcurrentDictionary<string, TaskCompletionSource<bool>> pending = new();
+    private readonly object gate = new();
+    private bool registered;
+    private bool disposed;
+
+    public async Task<bool> ConfirmAsync(AgentApprovalPrompt prompt, CancellationToken cancellationToken)
+    {
+        if (!OperatingSystem.IsWindowsVersionAtLeast(10, 0, 17763)) return false;
+        cancellationToken.ThrowIfCancellationRequested();
+        var id = Guid.NewGuid().ToString("N");
+        var response = new TaskCompletionSource<bool>(TaskCreationOptions.RunContinuationsAsynchronously);
+        try
+        {
+            lock (gate)
+            {
+                if (disposed) return false;
+                if (!registered)
+                {
+                    ToastNotificationManagerCompat.OnActivated += OnActivated;
+                    registered = true;
+                }
+                pending[id] = response;
+                new ToastContentBuilder()
+                    .AddArgument("source", Source).AddArgument("requestId", id)
+                    .SetToastScenario(ToastScenario.Reminder)
+                    .SetToastDuration(ToastDuration.Long)
+                    .AddText(prompt.Title)
+                    .AddText(prompt.Message)
+                    .AddButton(new ToastButton().SetContent("Yes")
+                        .AddArgument("source", Source).AddArgument("requestId", id)
+                        .AddArgument("response", "yes").SetBackgroundActivation())
+                    .AddButton(new ToastButton().SetContent("No")
+                        .AddArgument("source", Source).AddArgument("requestId", id)
+                        .AddArgument("response", "no").SetBackgroundActivation())
+                    .Show(toast =>
+                    {
+                        toast.Tag = id;
+                        toast.Group = Source;
+                        toast.ExpirationTime = DateTimeOffset.Now.Add(prompt.Timeout);
+                    });
+            }
+
+            return await response.Task.WaitAsync(cancellationToken);
+        }
+        finally
+        {
+            pending.TryRemove(id, out _);
+            try { ToastNotificationManagerCompat.History.Remove(id, Source); }
+            catch (Exception exception) { logger.LogDebug(exception, "Could not remove approval notification {RequestId}", id); }
+        }
+    }
+
+    private void OnActivated(ToastNotificationActivatedEventArgsCompat args)
+    {
+        var arguments = NotificationActivationArguments.Parse(args.Argument);
+        if (arguments.GetValueOrDefault("source") != Source ||
+            !arguments.TryGetValue("requestId", out var id) ||
+            !pending.TryRemove(id, out var response)) return;
+        response.TrySetResult(arguments.GetValueOrDefault("response") == "yes");
+    }
+
+    public void Dispose()
+    {
+        lock (gate)
+        {
+            disposed = true;
+            if (registered) ToastNotificationManagerCompat.OnActivated -= OnActivated;
+            registered = false;
+            foreach (var response in pending.Values) response.TrySetResult(false);
+            pending.Clear();
+        }
+    }
+}
+#endif