Ribbon: Hex Mesh and Partitioned Mesh replace the duplicate hex entries (#270)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UhhZMBTviDQxZvwnyP89fo

crates/ui-egui/src/toolbar.rs

@@ -423,6 +423,7 @@ pub fn describe(app: &ModelApp) -> serde_json::Value {
                 "panel": c.panel,
                 "command": c.command(),
                 "more": c.more,
+                "covers": c.covers,
                 "coming_soon": c.milestone(),
                 "enabled": c.command().is_some() && missing.is_none(),
                 "unavailable": missing.map(|u| u.to_json()),