review fixes: complete success path, pool capacity navigation, time parser tests

- DiscordWizardSubmitter.SubmitAsync: confirm success, delete draft, clear context.
- GameCreationWizard: pool free-text duration now advances to Capacity.
- PreviousStep(Capacity) returns PoolSystemDuration for pools.
- Remove unused optional IPlatformMessenger/NpgsqlDataSource from submitter.
- Add DiscordTimeParserTests preserving ParseTimeInput coverage.

src/GmRelay.DiscordBot/Features/Sessions/Wizard/DiscordWizardSubmitter.cs

@@ -12,7 +12,6 @@ using GmRelay.Shared.Platform;
 using Microsoft.Extensions.Logging;
 using NetCord;
 using NetCord.Rest;
-using Npgsql;
 
 namespace GmRelay.DiscordBot.Features.Sessions.Wizard;
 
@@ -32,25 +31,19 @@ public sealed class DiscordWizardSubmitter
     private readonly IWizardDraftRepository _drafts;
     private readonly IWizardContextStore _contextStore;
     private readonly ILogger<DiscordWizardSubmitter> _log;
-    private readonly IPlatformMessenger? _platformMessenger;
-    private readonly NpgsqlDataSource? _dataSource;
 
     public DiscordWizardSubmitter(
         CreateSessionHandler shared,
         RestClient rest,
         IWizardDraftRepository drafts,
         IWizardContextStore contextStore,
-        ILogger<DiscordWizardSubmitter> log,
-        IPlatformMessenger? platformMessenger = null,
-        NpgsqlDataSource? dataSource = null)
+        ILogger<DiscordWizardSubmitter> log)
     {
         _shared = shared;
         _rest = rest;
         _drafts = drafts;
         _contextStore = contextStore;
         _log = log;
-        _platformMessenger = platformMessenger;
-        _dataSource = dataSource;
     }
 
     /// <summary>
@@ -91,6 +84,15 @@ public sealed class DiscordWizardSubmitter
 
                 created.Add((cmd, result));
             }
+
+            // Success: replace the wizard message with a confirmation and
+            // clean up the draft so the user can start a new one later.
+            var confirmation = created.Count == 1
+                ? $"✅ Создано: {created[0].Command.Title}"
+                : $"✅ Создано: {created[0].Command.Title} и ещё {created.Count - 1} сессия/сессии";
+            await EditDraftMessageAsync(draft, confirmation, Array.Empty<WizardAction>(), ct);
+            await _drafts.DeleteAsync(draft.Id, ct);
+            _contextStore.Remove(draft.Id);
         }
         catch (Exception ex)
         {