feat(settings): refine density, group detailed options and add edge maximize gestures

shell/ferese-settings/src/main.rs

@@ -128,6 +128,7 @@ enum Message {
     RefreshRate(String, displays::Mode, bool),
     ThemeChanged(Box<ferese_ipc::theme::Snapshot>),
     DragWindow,
+    ToggleMaximize,
     Page(Page),
     PagePresented(Page),
     RowVisibility(&'static str, usize, bool),
@@ -378,6 +379,7 @@ impl cosmic::Application for App {
             Message::RefreshTrayApps => return self.load_tray_apps(),
             Message::Options(input) => return self.options_input(input),
             Message::DragWindow => return self.core.drag(None),
+            Message::ToggleMaximize => return self.core.toggle_maximize(None),
             Message::ReadRenderScale(id) => {
                 return cosmic::iced::window::scale_factor(id)
                     .map(|scale| cosmic::Action::App(Message::RenderScale(scale)));
@@ -1268,9 +1270,11 @@ mod tests {
         let mut app = app();
         app.core.set_main_window_id(None);
         assert_eq!(app.update(Message::DragWindow).units(), 0);
+        assert_eq!(app.update(Message::ToggleMaximize).units(), 0);
         app.core
             .set_main_window_id(Some(cosmic::iced::window::Id::unique()));
         assert_eq!(app.update(Message::DragWindow).units(), 1);
+        assert_eq!(app.update(Message::ToggleMaximize).units(), 1);
     }
 
     fn shortcuts(count: usize) -> App {
@@ -1636,10 +1640,9 @@ mod tests {
         app.visible_rows
             .extend((0..100).map(|index| ("bindings", index)));
         let eager = nodes(&app);
-        assert!(
-            eager > visible + 96 * 10,
-            "visible={visible}, eager={eager}"
-        );
+        // Mounting only visible rows should cut the widget tree substantially,
+        // independently of how many wrappers a field label uses.
+        assert!(eager > visible * 2, "visible={visible}, eager={eager}");
     }
 
     #[test]