Fixes

LobbyActor.cs

@@ -479,6 +479,10 @@ public class LobbyActor : IDisposable
                 ProcessCastVote(player, m, ref ack);
                 break;
                 
+            case TaskStart m:
+                ProcessTaskStart(player, m, ref ack);
+                break;
+
             case TaskComplete m:
                 ProcessTaskComplete(player, m, ref ack);
                 break;
@@ -1083,6 +1087,59 @@ public class LobbyActor : IDisposable
         CheckWinConditions();
     }
     
+    private void ProcessTaskStart(Player player, TaskStart message, ref Ack ack)
+    {
+        // Same gating as TaskComplete: must be Playing, no meeting, must be crew.
+        if (_phase != GamePhase.Playing || _currentMeeting != null)
+        {
+            ack.Success = false;
+            ack.Error = "Nelze začít task";
+            return;
+        }
+
+        if (player.State != PlayerState.Alive)
+        {
+            ack.Success = false;
+            ack.Error = "Mrtví hráči nemohou provádět tasky";
+            return;
+        }
+
+        if (player.Role == PlayerRole.Impostor)
+        {
+            ack.Success = false;
+            ack.Error = "Impostoři nemohou dělat tasky";
+            return;
+        }
+
+        // Validate the task belongs to this player and isn't already done.
+        var task = player.Tasks.FirstOrDefault(t => t.TaskId == message.TaskId);
+        if (task == null || player.CompletedTaskIds.Contains(message.TaskId))
+        {
+            ack.Success = false;
+            ack.Error = "Neznámý nebo již dokončený task";
+            return;
+        }
+
+        // Distance check (same threshold as TryCompleteTask uses).
+        var distance = player.Position.DistanceTo(task.Location);
+        if (distance > _config.TaskStartDistanceM)
+        {
+            ack.Success = false;
+            ack.Error = $"Příliš daleko od tasku ({distance:F1}m)";
+            return;
+        }
+
+        player.CurrentTaskId = message.TaskId;
+
+        var evt = CreateEvent("TaskStarted", player.ClientUuid, new TaskStartedPayload
+        {
+            ClientUuid = player.ClientUuid,
+            TaskId = message.TaskId
+        });
+
+        PersistAndBroadcast(evt);
+    }
+
     private void ProcessTaskComplete(Player player, TaskComplete message, ref Ack ack)
     {
         if (_phase != GamePhase.Playing || _currentMeeting != null)
@@ -1551,9 +1608,21 @@ public class LobbyActor : IDisposable
         station.IsRepaired = true;
         station.RepairingPlayerId = player.ClientUuid;
         station.RepairStartTime = DateTime.UtcNow;
-        
+
         _logger.LogInformation("Stanice opravena: {Station} by {Player}", station.Name, player.DisplayName);
-        
+
+        // Broadcast that this station's repair started so other clients can
+        // surface "1/2 stations active" coaching during multi-station
+        // (meltdown) sabotage. Without this, only the meltdown countdown
+        // is visible - players don't know whether anyone else is helping.
+        var startedEvt = CreateEvent("RepairStarted", player.ClientUuid, new RepairStartedPayload
+        {
+            SabotageId = _currentSabotage.SabotageId,
+            StationId = station.StationId,
+            PlayerId = player.ClientUuid
+        });
+        PersistAndBroadcast(startedEvt);
+
         // Zkontroluj zda je sabotáž kompletně opravena
         CheckSabotageRepairComplete(player.ClientUuid, station.StationId);
     }

Protocol.cs

@@ -733,6 +733,12 @@ public class PlayerEjectedPayload
     public PlayerRole Role { get; set; }
 }
 
+public class TaskStartedPayload
+{
+    public required string ClientUuid { get; set; }
+    public required string TaskId { get; set; }
+}
+
 public class TaskCompletedPayload
 {
     public required string ClientUuid { get; set; }
@@ -793,6 +799,13 @@ public class RepairStartedPayload
     public required string PlayerId { get; set; }
 }
 
+public class RepairStartedPayload
+{
+    public required string SabotageId { get; set; }
+    public required string StationId { get; set; }
+    public required string PlayerId { get; set; }
+}
+
 public class RepairStoppedPayload
 {
     public required string SabotageId { get; set; }