fix(discord): update sessions via interactions

tests/GmRelay.Bot.Tests/Discord/DiscordListSessionsHandlerTests.cs

@@ -47,6 +47,17 @@ public sealed class DiscordListSessionsHandlerTests
         Assert.DoesNotContain("telegram_id", handler, StringComparison.Ordinal);
     }
 
+    [Fact]
+    public void Handler_ShouldExposeDeleteActionForManagers()
+    {
+        var repoRoot = GetRepoRoot();
+        var handlerPath = Path.Combine(repoRoot, "src", "GmRelay.DiscordBot", "Features", "Sessions", "DiscordListSessionsHandler.cs");
+        var handler = File.ReadAllText(handlerPath);
+
+        Assert.Contains("delete_session", handler, StringComparison.Ordinal);
+        Assert.Contains("CanManageSchedule", handler, StringComparison.Ordinal);
+    }
+
     [Fact]
     public void Command_ShouldExist()
     {
@@ -66,4 +77,18 @@ public sealed class DiscordListSessionsHandlerTests
         Assert.Contains("SlashCommand", command, StringComparison.Ordinal);
         Assert.Contains("listsessions", command, StringComparison.Ordinal);
     }
+
+    [Fact]
+    public void DeleteHandler_ShouldDeleteOnlySessionsFromTheInteractionGuild()
+    {
+        var repoRoot = GetRepoRoot();
+        var handlerPath = Path.Combine(repoRoot, "src", "GmRelay.DiscordBot", "Features", "Sessions", "DiscordDeleteSessionHandler.cs");
+
+        Assert.True(File.Exists(handlerPath), "DiscordDeleteSessionHandler should exist.");
+
+        var handler = File.ReadAllText(handlerPath);
+        Assert.Contains("DELETE FROM sessions", handler, StringComparison.Ordinal);
+        Assert.Contains("external_group_id = @GuildId", handler, StringComparison.Ordinal);
+        Assert.Contains("CanManageSchedule", handler, StringComparison.Ordinal);
+    }
 }

tests/GmRelay.Bot.Tests/Discord/DiscordSessionInteractionModuleSourceTests.cs

@@ -21,6 +21,26 @@ public sealed class DiscordSessionInteractionModuleSourceTests
         Assert.Contains("MessageFlags.Ephemeral", source, StringComparison.Ordinal);
     }
 
+    [Fact]
+    public async Task Module_ShouldUpdateSourceScheduleMessageThroughComponentInteraction()
+    {
+        var source = await ReadRepositoryFileAsync("src/GmRelay.DiscordBot/Features/Sessions/DiscordSessionInteractionModule.cs");
+
+        Assert.Contains("InteractionCallback.DeferredModifyMessage", source, StringComparison.Ordinal);
+        Assert.Contains("DiscordSessionBatchRenderer.Render", source, StringComparison.Ordinal);
+        Assert.Contains("FollowupAsync", source, StringComparison.Ordinal);
+        Assert.Contains("CompleteScheduleUpdateResponseAsync", source, StringComparison.Ordinal);
+    }
+
+    [Fact]
+    public async Task Module_ShouldRouteDeleteSessionButtons()
+    {
+        var source = await ReadRepositoryFileAsync("src/GmRelay.DiscordBot/Features/Sessions/DiscordSessionInteractionModule.cs");
+
+        Assert.Contains("[ComponentInteraction(\"delete_session\")]", source, StringComparison.Ordinal);
+        Assert.Contains("DiscordDeleteSessionHandler", source, StringComparison.Ordinal);
+    }
+
     [Fact]
     public async Task Module_ShouldRouteRsvpButtonsToNeutralHandler()
     {