merge: epoch-1.10.0 d'upstream

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/shell/element/mod.rs

@@ -430,6 +430,10 @@ impl CosmicMapped {
         }
     }
 
+    pub fn is_sticky(&self) -> bool {
+        self.active_window().is_sticky()
+    }
+
     pub fn pending_size(&self) -> Option<Size<i32, Logical>> {
         match &self.element {
             CosmicMappedInternal::Stack(s) => s.pending_size(),