feat(worker): add ContinueTask, GetAgents, RefreshAgents hub methods and RunCreated broadcast

src/ClaudeDo.Worker/Hub/HubBroadcaster.cs

@@ -22,4 +22,7 @@ public sealed class HubBroadcaster
 
     public Task TaskUpdated(string taskId) =>
         _hub.Clients.All.SendAsync("TaskUpdated", taskId);
+
+    public Task RunCreated(string taskId, int runNumber, bool isRetry) =>
+        _hub.Clients.All.SendAsync("RunCreated", taskId, runNumber, isRetry);
 }

src/ClaudeDo.Worker/Hub/WorkerHub.cs

@@ -1,4 +1,5 @@
 using System.Reflection;
+using ClaudeDo.Data.Models;
 using ClaudeDo.Worker.Services;
 using Microsoft.AspNetCore.SignalR;
 
@@ -10,8 +11,13 @@ public sealed class WorkerHub : Microsoft.AspNetCore.SignalR.Hub
         Assembly.GetExecutingAssembly().GetName().Version?.ToString(3) ?? "0.0.0";
 
     private readonly QueueService _queue;
+    private readonly AgentFileService _agentService;
 
-    public WorkerHub(QueueService queue) => _queue = queue;
+    public WorkerHub(QueueService queue, AgentFileService agentService)
+    {
+        _queue = queue;
+        _agentService = agentService;
+    }
 
     public string Ping() => $"pong v{Version}";
 
@@ -38,7 +44,27 @@ public sealed class WorkerHub : Microsoft.AspNetCore.SignalR.Hub
         }
     }
 
+    public async Task<string> ContinueTask(string taskId, string followUpPrompt)
+    {
+        try
+        {
+            return await _queue.ContinueTask(taskId, followUpPrompt);
+        }
+        catch (InvalidOperationException ex)
+        {
+            throw new HubException(ex.Message);
+        }
+        catch (KeyNotFoundException)
+        {
+            throw new HubException("task not found");
+        }
+    }
+
     public bool CancelTask(string taskId) => _queue.CancelTask(taskId);
 
     public void WakeQueue() => _queue.WakeQueue();
+
+    public async Task<List<AgentInfo>> GetAgents() => await _agentService.ScanAsync();
+
+    public async Task RefreshAgents() => await _agentService.ScanAsync();
 }