* feat(announcement): add database schema for SQLite and PostgreSQL
Add announcement table with id, title, content, enabled, created_at, updated_at columns to both SQLite and PostgreSQL schemas to support announcement system.
* feat(announcement): implement SQLite repository for announcement management
Add announcement CRUD operations in SQLite repository including create, read, update, delete, and list methods with proper error handling.
* feat(announcement): add HTTP handlers and auth middleware for announcement API
Implement admin-only update endpoint and public read endpoint for announcements. Add auth middleware to enforce admin-only access for update operations.
* feat(announcement): add frontend API client for announcement endpoints
Implement API client methods for fetching announcements and updating announcement settings with proper error handling.
* feat(announcement): add announcement display component to dashboard
Implement announcement display section in dashboard with real-time updates and proper styling using HeroUI components.
* feat(announcement): add announcement management UI to config page
Implement announcement settings panel with enable/disable toggle and content editor for admin users to manage announcements.
sagit