#248: test that the start screen offers every print preset including A6

The start screen showed only the first ten presets and had no A6 sheet. The test checks that the start screen paints a card for each print preset, that A6 exists at 105 x 148 mm, and that the Properties page-size list agrees. Without the fix it fails because the B5 card is cut off by take(10) and there is no A6.

crates/ui-egui/src/menus.rs

@@ -5655,4 +5655,19 @@ mod tests {
         }
         assert!(!menu_enabled(&app, "view.rulers"), "other UI commands still need a document");
     }
+
+    // Regression test for #248: the start screen offered no A6 sheet (it listed only the first ten presets).
+    #[test]
+    fn start_screen_offers_every_print_preset_including_a6() {
+        let mut app = crate::DesignApp::new(designcraft_engine::Session::new(), crate::Services::default());
+        let texts = start_screen_texts(&mut app);
+        for p in designcraft_doc::build::PRESETS.iter().filter(|p| p.intent == designcraft_doc::Intent::Print) {
+            assert!(texts.iter().any(|t| t == p.name), "start screen lacks the {} card: {texts:?}", p.name);
+        }
+        assert!(texts.iter().any(|t| t == "A6"), "{texts:?}");
+        let a6 = designcraft_doc::build::PRESETS.iter().find(|p| p.name == "A6").unwrap();
+        assert!((a6.width - 105.0 * 72.0 / 25.4).abs() < 0.01 && (a6.height - 148.0 * 72.0 / 25.4).abs() < 0.01, "{a6:?}");
+        let page = crate::panels::properties::PAGE_PRESETS.iter().find(|p| p.0 == "A6").expect("Properties page-size list has A6");
+        assert!((page.1 - a6.width).abs() < 0.01 && (page.2 - a6.height).abs() < 0.01, "{page:?} vs {a6:?}");
+    }
 }