Fix indentation test fixture borrowing and focus trait import

crates/oa-desktop/src/app/source_indentation_tests.rs

@@ -5,7 +5,7 @@ fn fixture(source: &str) -> App {
     let mut app = App::with_project(Project::empty());
     app.page = Page::Text;
     app.source_workspace = Workspace::new(
-        oa_core::source_project::SourceBundle {
+        &oa_core::source_project::SourceBundle {
             entry: "project.arcadia".into(),
             files: std::collections::BTreeMap::from([("project.arcadia".into(), source.into())]),
         },

crates/oa-desktop/src/source_indentation/keyboard_tests.rs

@@ -1,5 +1,6 @@
 //! Real mounted Iced keyboard dispatch, using the production binding function.
 use crate::{app::Message, source_navigation::SymbolContext, views::source_tests::FontLayout};
+use iced::advanced::widget::operation::Focusable;
 use iced::{
     Element, Font, Rectangle, Size,
     advanced::{Layout, Shell, layout, text, widget as core_widget},