feat(worker): resume a task's claude session in a terminal

src/ClaudeDo.Worker/Planning/Interfaces/ITerminalLauncher.cs

@@ -7,6 +7,10 @@ public interface ITerminalLauncher
 {
     Task LaunchPlanningStartAsync(PlanningSessionStartContext ctx, CancellationToken cancellationToken);
     Task LaunchPlanningResumeAsync(PlanningSessionResumeContext ctx, CancellationToken cancellationToken);
+
+    // Resumes an arbitrary task's Claude session (--resume <id>) in a visible terminal so
+    // the user can pick up the conversation by hand — the "pick up in terminal" action.
+    Task LaunchResumeAsync(string workingDir, string claudeSessionId, CancellationToken cancellationToken);
 }
 
 public sealed class TerminalLaunchException : Exception