feat: introduce a background daemon service for persistent operation and inter-process communication.

Commands/DiscardCommand.cs

@@ -1,9 +1,8 @@
-using System.IO;
+using System;
+using System.Net.Sockets;
 using System.Threading.Tasks;
 using Spectre.Console;
-using Toak.Audio;
 using Toak.Core;
-using Toak.IO;
 
 namespace Toak.Commands;
 
@@ -13,23 +12,34 @@ public static class DiscardCommand
     {
         Logger.Verbose = verbose;
         
-        if (StateTracker.IsRecording())
+        var socketPath = DaemonService.GetSocketPath();
+        
+        try
         {
-            AudioRecorder.StopRecording();
-            var wavPath = AudioRecorder.GetWavPath();
-            if (File.Exists(wavPath)) File.Delete(wavPath);
-            Notifications.Notify("Toak", "Recording discarded");
-            if (!pipeToStdout) 
+            using var socket = new Socket(AddressFamily.Unix, SocketType.Stream, ProtocolType.Unspecified);
+            var endPoint = new UnixDomainSocketEndPoint(socketPath);
+            await socket.ConnectAsync(endPoint);
+            
+            // Send ABORT (cmd == 3)
+            await socket.SendAsync(new byte[] { 3 }, SocketFlags.None);
+            
+            if (verbose)
             {
-                AnsiConsole.MarkupLine("[yellow]Recording discarded.[/]");
+                Console.WriteLine("Sent ABORT command to daemon.");
             }
         }
-        else
+        catch (SocketException)
         {
-            if (!pipeToStdout) 
+            if (!pipeToStdout)
             {
-                AnsiConsole.MarkupLine("[grey]No active recording to discard.[/]");
+                AnsiConsole.MarkupLine("[red]Failed to connect to Toak daemon.[/]");
+                AnsiConsole.MarkupLine("Please ensure the daemon is running in the background:");
+                AnsiConsole.MarkupLine("  [dim]toak daemon[/]");
             }
         }
+        catch (Exception ex)
+        {
+            if (!pipeToStdout) AnsiConsole.MarkupLine($"[red]Error:[/] {ex.Message}");
+        }
     }
 }