Results: a static step first shows its contours undeformed

The first look at a solved static step draws the von Mises contours on the
true geometry; the deformed shape comes when asked for (Deformed,
results.deformed, results.animate), at the automatic scale. Frequency steps
still open on mode 1 deformed and explicit steps at true scale, as the
owner's notes in #77 ask; a 0.24 mm deflection drawn as 10 mm no longer
reads as a failed part.

Fixes #77

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UhhZMBTviDQxZvwnyP89fo

crates/ui-egui/src/lib.rs

@@ -1693,7 +1693,8 @@ mod tests {
         app.start("solve.static").unwrap();
         app.run_dialog().unwrap();
         let view = app.session.results_view.clone().unwrap();
-        assert_eq!((view.step.as_str(), view.contour, view.deformed), ("Load", Some(fieldcraft_engine::results::Field::VonMises), true));
+        // A static step first shows its contours on the undeformed shape (#77).
+        assert_eq!((view.step.as_str(), view.contour, view.deformed), ("Load", Some(fieldcraft_engine::results::Field::VonMises), false));
         app.logic(&egui::Context::default());
         assert_eq!(app.ui.tab, Tab::Results);
         app.run("solve.frequency", json!({})).unwrap();