upd(readme): add a note

src/CapySR.GameServer/Handlers/TutorialHandlers.cs

@@ -7,17 +7,43 @@ namespace CapySR.GameServer.Handlers;
 [Handlers]
 public static class TutorialHandlers
 {
+    // the client reads rsp.Tutorial / rsp.TutorialGuide without a nil check, so leaving
+    // them unset throws in TutorialModule.lua and the load never gets past the loading
+    // screen. echo the id back and call it finished, like the rest of the tutorial state.
     public static Task OnUnlockTutorial(PlayerSession session, UnlockTutorialCsReq request) =>
-        session.SendAsync(new UnlockTutorialScRsp { Retcode = 0 });
+        session.SendAsync(new UnlockTutorialScRsp
+        {
+            Retcode = 0,
+            Tutorial = Tutorial(request.HPIMDINCCNN),
+        });
 
     public static Task OnFinishTutorial(PlayerSession session, FinishTutorialCsReq request) =>
-        session.SendAsync(new FinishTutorialScRsp { Retcode = 0 });
+        session.SendAsync(new FinishTutorialScRsp
+        {
+            Retcode = 0,
+            Tutorial = Tutorial(request.TutorialId),
+        });
 
     public static Task OnUnlockTutorialGuide(PlayerSession session, UnlockTutorialGuideCsReq request) =>
-        session.SendAsync(new UnlockTutorialGuideScRsp { Retcode = 0 });
+        session.SendAsync(new UnlockTutorialGuideScRsp
+        {
+            Retcode = 0,
+            TutorialGuide = Guide(request.GroupId, request.Type),
+        });
 
     public static Task OnFinishTutorialGuide(PlayerSession session, FinishTutorialGuideCsReq request) =>
-        session.SendAsync(new FinishTutorialGuideScRsp { Retcode = 0 });
+        session.SendAsync(new FinishTutorialGuideScRsp
+        {
+            Retcode = 0,
+            Reward = new ItemList(),
+            TutorialGuide = Guide(request.GroupId, request.Type),
+        });
+
+    private static Tutorial Tutorial(uint id) =>
+        new() { Id = id, Status = TutorialStatus.TutorialFinish };
+
+    private static TutorialGuide Guide(uint groupId, TutorialGuideType type) =>
+        new() { Id = groupId, Type = type, Status = TutorialStatus.TutorialFinish };
 
     public static Task OnSetClientPaused(PlayerSession session, SetClientPausedCsReq request) =>
         session.SendAsync(new SetClientPausedScRsp { Retcode = 0, Paused = request.Paused });