feat: allow empty workspaces to be focused in focus_in_direction

packages/wm/src/containers/commands/focus_in_direction.rs

@@ -158,12 +158,18 @@ fn workspace_focus_target(
 ) -> anyhow::Result<Option<Container>> {
   let monitor = origin_container.monitor().context("No monitor.")?;
 
-  let focus_target = state
+  let target_workspace = state
     .monitor_in_direction(&monitor, direction)?
-    .and_then(|monitor| monitor.displayed_workspace())
+    .and_then(|monitor| monitor.displayed_workspace());
+
+  let focus_target = target_workspace
+    .as_ref()
     .and_then(|workspace| {
-      workspace.descendant_in_direction(&direction.inverse())
-    });
+      workspace
+        .descendant_in_direction(&direction.inverse())
+        .map(Into::into)
+    })
+    .or(target_workspace.map(Into::into));
 
-  Ok(focus_target.map(Into::into))
+  Ok(focus_target)
 }