fix(ui): test that Properties ▸ Space Audit measures again after an edit

The tab caches the audit per document and edit generation. Pin both
halves: frames with the file unchanged keep the same rows, and an edit
made while the tab is open (a new bookmark) shows up on the next frame.
With the cache keyed on the document alone, the test fails.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

crates/ui-egui/tests/it/dialog_chrome.rs

@@ -168,6 +168,40 @@ fn space_audit_tab_measures_the_file_and_stays_in_the_card() {
     }
 }
 
+#[test]
+fn space_audit_tab_measures_again_after_an_edit() {
+    use pdfcraft_engine::optimize::SpaceCategory;
+    let mut h = Harness::builder().with_size(egui::vec2(1400.0, 900.0)).build_eframe(|_cc| {
+        let mut app = PdfCraftApp::new();
+        app.set_option("language", "en").unwrap();
+        app.open_bytes("doc.pdf", None, fixture()).unwrap();
+        app.set_option("dialog", "space-audit").unwrap();
+        app
+    });
+    h.run_steps(4);
+    let bookmarks =
+        |h: &Harness<'_, PdfCraftApp>| h.state().space_audit.iter().filter(|r| r.category == SpaceCategory::Bookmarks).map(|r| r.bytes).sum::<u64>();
+    let before = h.state().space_audit.clone();
+    assert_eq!(bookmarks(&h), 0, "the fixture has no outline: {before:?}");
+    // Further frames with the file unchanged keep the same measurement.
+    h.run_steps(2);
+    assert_eq!(h.state().space_audit, before);
+    // An edit while the tab is open is measured on the next frame.
+    h.state_mut().apply_edit(pdfcraft_engine::Edit::AddBookmark {
+        parent: vec![],
+        index: 0,
+        title: "Chapter".into(),
+        page: 0,
+        left: None,
+        top: None,
+    });
+    h.run_steps(2);
+    assert!(bookmarks(&h) > 0, "the new outline is counted: {:?}", h.state().space_audit);
+    // The table shows the new row (the rail's Bookmarks button has the same label).
+    let card = card(&h, "dialog");
+    assert!(h.query_all_by_label("Bookmarks").any(|n| card.contains_rect(n.rect())), "a Bookmarks row in {card:?}");
+}
+
 #[test]
 fn dialog_buttons_follow_the_content_after_a_taller_tab() {
     use pdfcraft_ui_egui::{Dialog, PropsTab};