Implement bidirectional communication for announcement submissions:
- Display server feedback messages (e.g., announcement already in progress) in the admin menu
- Keep the menu open after sending to allow users to retry if submission fails
- Add net.Receive handler to process server responses
- Show countdown timer when announcement is already in progress
- Close menu only on successful publication, not on rejection
This improves UX by giving admins visibility into why their submission failed and allowing them to correct and resubmit without losing their input.
Implement a custom GUI menu for administrators to send announcements with the following features:
- Support for announcement presets that auto-fill title and message fields
- Real-time character count validation with visual feedback
- Warning indicator when message exceeds max length limit
- Custom styled text input fields with placeholder text
- Rounded corners and custom color scheme matching announcement styling
- Close button and ESC key handling
- Network message handling to send announcements to server
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