Add Highlight/Pin a specific post within a topic

Hello @baris @julian

Is it possible to add the ability for admins and moderators to visually highlight a specific post within a topic, directly from the post's edit/tools menu (the ⋮ ellipsis menu) ?

Currently, NodeBB only allows pinning an entire topic to the top of a category. There is no native way to draw attention to a specific reply or post within a long thread.

This is particularly useful when:

• A moderator or admin posts an important update mid-thread (e.g. rule changes, announcements, warnings)
• A staff message needs to stand out from regular user replies
• A thread is reopened with new conditions and the relevant post needs to be immediately visible

Right now, the only workaround is to manually add custom CSS targeting the post's data-pid attribute which is not user-friendly and requires admin-level CSS knowledge.

When enabled, the post would:

• Display a visible banner/label above the post content (e.g. " Important staff message" or other message)
• Have a distinct visual style (colored border, background) to stand out from regular posts
• Be toggleable (highlight / remove highlight)
• Optionally allow a custom label text to be set

Suggested UI

• In the ⋮ post tools menu: 📌 Highlight this post
• A modal or inline input to optionally set a custom label
• A highlighted post could expose a data-highlighted attribute or a .highlighted class for theme-level styling

Current Workaround

li.material[component="post"][data-pid="XXXXX"]::after {
    content: "📌 Important staff message";
    position: absolute;
    top: 0; left: 0; right: 0;
    background: #f39c12;
    color: #fff;
    font-weight: bold;
    padding: 6px 14px;
}

Example

This works but requires manual CSS editing per post and breaks on theme changes.

Many thanks