zhangyuheng 588fd66bb5 feat: add announcements feature with JSON data and interactive UI ...

- Created a new JSON file for announcements containing activity and maintenance updates.
- Implemented a JavaScript module to fetch, filter, and display announcements dynamically.
- Added functionality for editing announcements with a modal interface and live preview.
- Included drag-and-drop support for content blocks within the announcement editor.
- Enhanced user experience with category filtering and search capabilities.

2026-03-10 15:05:41 +08:00

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