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

src/ClaudeDo.Worker/Planning/WindowsTerminalLauncher.cs

@@ -88,6 +88,26 @@ public sealed class WindowsTerminalLauncher : ITerminalLauncher
         return Task.CompletedTask;
     }
 
+    public Task LaunchResumeAsync(string workingDir, string claudeSessionId, CancellationToken cancellationToken)
+    {
+        if (!Directory.Exists(workingDir))
+            throw new TerminalLaunchException($"Working directory does not exist: {workingDir}");
+
+        var resolvedWt = ResolveWtOrThrow();
+        var resolvedClaude = ResolveClaudeOrThrow();
+
+        var command = BuildResumeCommand(resolvedClaude, claudeSessionId);
+
+        StartInWindowsTerminal(resolvedWt, workingDir, command, static _ => { });
+
+        return Task.CompletedTask;
+    }
+
+    // Resumes a session by id in default (interactive) permission mode: the user drives
+    // tool approvals in the terminal, unlike planning which pins --permission-mode plan.
+    internal static string BuildResumeCommand(string claudePath, string claudeSessionId) =>
+        BuildPwshCommand(claudePath, new[] { "--resume", claudeSessionId });
+
     // Builds the PowerShell command that launches an interactive planning session.
     // Arg order matters: variadic flags (--allowedTools, --add-dir) come first; the
     // single-line kickoff prompt is positional, so it must follow a single-value flag