Edit: duplicating during a text edit ends the edit (#2226)

Edit > Duplicate replaces the layer selection with the copies, but an
open in-canvas text edit stayed on the original layer: typing kept
editing a layer that was no longer selected. When the duplicate leaves
the edited layer deselected, end the edit the way #2096's Deselect All
does (text_edit::end_edit), in the command every caller — menu, shortcut,
MCP — dispatches through.

Co-Authored-By: GLM-5.3-Flash <noreply@z.ai>

crates/engine/src/cmd/edit.rs

@@ -146,6 +146,11 @@ fn duplicate(s: &mut Session, p: &Value) -> Result<Value> {
         st.selected_layers = created.clone();
         Ok(created)
     })?;
+    // Duplicating selects the copies, so an open text edit on a now-deselected layer ends
+    // (#2226): typing must not keep editing an unselected layer.
+    if s.state.text_edit.as_ref().is_some_and(|e| !s.state.selected_layers.contains(&e.layer)) {
+        super::text_edit::end_edit(s, &Value::Null)?;
+    }
     Ok(json!(new.iter().map(|l| l.0).collect::<Vec<_>>()))
 }
 

crates/engine/src/tests/text_edit.rs

@@ -199,6 +199,20 @@ fn typing_deleting_and_caret_movement() {
     assert!(s.state.text_edit.is_none());
 }
 
+/// Duplicating during a text edit moves the selection to the copy: the edit on the original ends
+/// (#2226), as in After Effects — typing must not keep editing an unselected layer.
+#[test]
+fn duplicate_during_a_text_edit_ends_the_edit() {
+    let (mut s, t) = session("Hello");
+    s.execute("text.edit", json!({"layer": t, "caret": 5})).unwrap();
+    let copy = s.execute("edit.duplicate", json!({"layers": [t]})).unwrap()[0].as_u64().unwrap();
+    assert_ne!(copy, t, "the duplicate is created");
+    assert_eq!(s.state.selected_layers, vec![effectcraft_project::LayerId(copy)], "the copy is selected");
+    assert!(s.state.text_edit.is_none(), "the edit ended with the selection move (#2226)");
+    assert_eq!(doc(&s, t).text, "Hello", "the original keeps its text");
+    assert_eq!(doc(&s, copy).text, "Hello", "and the copy carries it");
+}
+
 #[test]
 fn caret_style_applies_to_the_next_typed_text() {
     let (mut s, t) = session("ab");