Pause the school on warning notices until the owner dismisses them.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/HSchool.Server/Api/DevEndpoints.cs

@@ -38,6 +38,43 @@ internal static class DevEndpoints
             return Results.Ok(MapDump(published, live));
         })
         .WithName("DumpSchool");
+
+        builder.MapPost("/api/dev/schools/{id:int}/notices", async (
+            int id,
+            PostDevNoticeRequest? request,
+            GameLoopService loop,
+            GameCommandQueue commands,
+            CancellationToken cancellationToken) =>
+        {
+            if (loop.FindSchool(id) is null)
+            {
+                return Problem(StatusCodes.Status404NotFound, "unknown-school", "That school does not exist.");
+            }
+
+            var defName = request?.DefName?.Trim() ?? "";
+            if (defName.Length == 0)
+            {
+                return Problem(StatusCodes.Status400BadRequest, "invalid-query", "defName is required.");
+            }
+
+            var command = new GameCommand.PostSchoolNotice(
+                id,
+                defName,
+                request?.PersonId ?? 0,
+                NewCompletion<PostedNotice?>());
+            commands.Enqueue(command);
+            var posted = await command.Result.Task.WaitAsync(CommandTimeout, cancellationToken);
+            if (posted is null)
+            {
+                return Problem(
+                    StatusCodes.Status409Conflict,
+                    "notice-rejected",
+                    "Unknown event def or the sticky notice ceiling is full.");
+            }
+
+            return Results.Ok(new { id = posted.Id, defName = posted.DefName, pause = posted.Pause });
+        })
+        .WithName("PostDevNotice");
     }
 
     private static SchoolDumpResponse MapDump(PublishedSchoolPeople published, SchoolLiveDump live)
@@ -115,3 +152,5 @@ internal sealed record SchoolDumpLessonResponse(
     string RoomId,
     int Day,
     int Period);
+
+internal sealed record PostDevNoticeRequest(string? DefName, uint PersonId);