Add EventDef notices, morning and lesson bells, and info toasts.

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

src/HSchool.Content/CatalogLoader.cs

@@ -318,6 +318,7 @@ public sealed class CatalogLoader
         var topics = new Dictionary<string, TopicDef>(StringComparer.Ordinal);
         var orientations = new Dictionary<string, OrientationDef>(StringComparer.Ordinal);
         var affinity = new Dictionary<string, AffinityRulesDef>(StringComparer.Ordinal);
+        var events = new Dictionary<string, EventDef>(StringComparer.Ordinal);
 
         foreach (var (key, json) in resolved)
         {
@@ -392,6 +393,9 @@ public sealed class CatalogLoader
                 case DefKind.AffinityRules:
                     affinity[key.Name] = Jsonc.Deserialize<AffinityRulesDef>(json);
                     break;
+                case DefKind.Event:
+                    events[key.Name] = Jsonc.Deserialize<EventDef>(json);
+                    break;
             }
         }
 
@@ -420,6 +424,7 @@ public sealed class CatalogLoader
             topics,
             orientations,
             affinity,
+            events,
             ru,
             en);
     }
@@ -534,6 +539,7 @@ public sealed class CatalogLoader
         }
 
         PeopleDefValidator.Validate(catalog, log);
+        EventDefValidator.Validate(catalog);
     }
 
     private static void WarnMissingLabels(DefCatalog catalog, IContentLog log)
@@ -571,7 +577,8 @@ public sealed class CatalogLoader
             .Concat(Enumerate(catalog.Colors.Values))
             .Concat(Enumerate(catalog.Topics.Values))
             .Concat(Enumerate(catalog.Orientations.Values))
-            .Concat(Enumerate(catalog.Affinity.Values));
+            .Concat(Enumerate(catalog.Affinity.Values))
+            .Concat(Enumerate(catalog.Events.Values));
 
         static IEnumerable<Def> Enumerate(IEnumerable<Def> defs) => defs.Where(def => !def.Abstract);
     }