Added announcement modal (#3098)

ui/desktop/announcements/content.ts

@@ -0,0 +1,7 @@
+// Map of announcement file names to their content
+export const announcementContents: Record<string, string> = {};
+
+// Helper function to get announcement content by filename
+export function getAnnouncementContent(filename: string): string | null {
+  return announcementContents[filename] || null;
+}

ui/desktop/announcements/index.json

@@ -0,0 +1 @@
+[]