• HeaderBar
- Added dynamic unread badge; click now opens NoticeModal on “System Announcements” tab
- Passes `defaultTab` and `unreadKeys` props to NoticeModal for contextual behaviour
• NoticeModal
- Introduced Tabs inside the modal title with Lucide icons (Bell, Megaphone)
- Displays in-app notice (markdown) and system announcements separately
- Highlights unread announcements with “shine” text animation
- Accepts new props `defaultTab`, `unreadKeys` to control initial tab and highlight logic
• CSS (index.css)
- Implemented `sweep-shine` keyframes and `.shine-text` utility for left-to-right glow
- Added dark-mode variant for better contrast
- Ensured cross-browser support with standard `background-clip`
Overall, users now see an unread counter, are directed to new announcements automatically, and benefit from an eye-catching glow effect that works in both light and dark themes.
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