🎨 Use feature based folder structure

lib/core/services/event_bus.dart

@@ -0,0 +1,53 @@
+import 'package:event_bus/event_bus.dart';
+
+/// Global event bus instance for the application
+final eventBus = EventBus();
+
+/// Event fired when a post is successfully created
+class PostCreatedEvent {
+  final String? postId;
+  final String? title;
+  final String? content;
+
+  const PostCreatedEvent({this.postId, this.title, this.content});
+}
+
+/// Event fired when chat rooms need to be refreshed
+class ChatRoomsRefreshEvent {
+  const ChatRoomsRefreshEvent();
+}
+
+/// Event fired when OIDC auth callback is received
+class OidcAuthCallbackEvent {
+  final String challengeId;
+
+  const OidcAuthCallbackEvent(this.challengeId);
+}
+
+/// Event fired to trigger the command palette
+class CommandPaletteTriggerEvent {
+  const CommandPaletteTriggerEvent();
+}
+
+/// Event fired to show the compose post sheet
+class ShowComposeSheetEvent {
+  const ShowComposeSheetEvent();
+}
+
+/// Event fired to show the notification sheet
+class ShowNotificationSheetEvent {
+  const ShowNotificationSheetEvent();
+}
+
+/// Event fired to show the thought sheet
+class ShowThoughtSheetEvent {
+  final String? initialMessage;
+  final List<Map<String, dynamic>> attachedMessages;
+  final List<String> attachedPosts;
+
+  const ShowThoughtSheetEvent({
+    this.initialMessage,
+    this.attachedMessages = const [],
+    this.attachedPosts = const [],
+  });
+}