Navigation bar: Look At (selected face or plane, else the active sketch) and visual style (shaded with edges, shaded, wireframe; kept between runs); F6 fits the view

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AS5Tn3xieewUSg3uxrMVdL

crates/ui-egui/src/toolbar.rs

@@ -406,6 +406,7 @@ pub fn shortcuts(app: &mut SolveApp, ctx: &egui::Context) {
                 }
             }
             Key::S => app.ui.palette_open = true,
+            Key::F6 => app.animate_view("fit"),
             Key::Delete | Key::Backspace => crate::viewport::delete_selection(app),
             _ => {
                 let name = format!("{k:?}");