Files: a press on a download's button stays with the button

gpui runs the click of every pressed element under the pointer, so a
press on a finished download's Show button also opened the file through
the pressable row. The actions' box stops the press on mouse down, so
the row starts no click of its own.

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

src/files/tests/transfers.rs

@@ -1,6 +1,6 @@
 use gpui::{
-    Context, Entity, IntoElement, ParentElement, Render, SharedString, Styled, TestAppContext,
-    VisualTestContext, Window, div, px,
+    Context, Entity, IntoElement, Modifiers, ParentElement, Render, SharedString, Styled,
+    TestAppContext, VisualTestContext, Window, div, px,
 };
 
 use super::{press, settle, setup};
@@ -255,3 +255,20 @@ fn a_download_comes_down() {
     up.upload = true;
     let _ = DownloadManager::new("downloads", [up]);
 }
+
+#[gpui::test]
+fn a_press_on_show_shows_and_opens_nothing(cx: &mut TestAppContext) {
+    setup(cx);
+    let (host, cx) = cx.add_window_view(|_, _| Downloading { asked: Vec::new() });
+    cx.update(|window, _| window.activate_window());
+    settle(cx);
+    let actions = cx
+        .debug_bounds("transfer-actions done")
+        .expect("the finished row's actions draw");
+    cx.simulate_click(actions.center(), Modifiers::none());
+    settle(cx);
+    assert_eq!(
+        host.read_with(cx, |host, _| host.asked.clone()),
+        ["show done"]
+    );
+}

src/files/transfer.rs

@@ -1,8 +1,8 @@
 use std::rc::Rc;
 
 use gpui::{
-    AnyElement, App, ElementId, InteractiveElement, IntoElement, ParentElement, SharedString,
-    StatefulInteractiveElement, Styled, Window, div, prelude::*,
+    AnyElement, App, ElementId, InteractiveElement, IntoElement, MouseButton, ParentElement,
+    SharedString, StatefulInteractiveElement, Styled, Window, div, prelude::*,
 };
 
 use super::FileIcon;
@@ -201,8 +201,10 @@ pub(super) fn row(id: ElementId, transfer: &Transfer, asks: &Asks, cx: &App) ->
         )
         .child(
             div()
+                .debug_selector(move || format!("transfer-actions {key}"))
                 .flex_none()
                 .flex()
+                .on_mouse_down(MouseButton::Left, |_, _, cx| cx.stop_propagation())
                 .children(actions.into_iter().flatten()),
         )
         .into_any_element()