feat: persist diff file review checkmarks

tests/unit/diff.rs

@@ -2163,6 +2163,51 @@ fn reviewed_files_survive_lazy_details_and_views_but_reset_on_comparison() {
     assert!(state.reviewed_files.is_empty());
 }
 
+#[test]
+fn restored_review_marks_use_revision_pairs_and_rename_paths_not_catalog_order() {
+    let mut state = DiffState::new();
+    state.request_kind = Some(RequestKind::Comparison);
+    state.apply_result(1, Ok(Outcome::Comparison(comparison())));
+    assert_eq!(state.toggle_reviewed(), Ok(true));
+    state.comparison.as_mut().unwrap().files.swap(0, 1);
+    state.restore_reviewed_files();
+    assert_eq!(state.reviewed_files, BTreeSet::from([1]));
+    state.comparison.as_mut().unwrap().files[1].old_path = Some("different.txt".into());
+    state.restore_reviewed_files();
+    assert!(state.reviewed_files.is_empty());
+    state.comparison.as_mut().unwrap().files[1].old_path = Some("old.txt".into());
+    for side in [0, 1] {
+        let original = state.comparison.as_ref().unwrap().revisions[side].clone();
+        state.comparison.as_mut().unwrap().revisions[side].push_str("-different");
+        state.restore_reviewed_files();
+        assert!(state.reviewed_files.is_empty());
+        state.comparison.as_mut().unwrap().revisions[side] = original;
+    }
+    state.comparison.as_mut().unwrap().files[1].loaded = false;
+    state.restore_reviewed_files();
+    assert_eq!(state.reviewed_files, BTreeSet::from([1]));
+}
+
+#[test]
+fn restored_live_review_marks_require_exact_text_and_final_newline() {
+    let mut state = live_state(vec!["base".into()], vec!["changed".into()], false);
+    state.refresh_after(&["unsaved".into(), String::new()], 1);
+    assert_eq!(state.toggle_reviewed(), Ok(true));
+    let document = state.local_review.document.clone();
+    let mut reopened = live_state(vec!["base".into()], vec!["changed".into()], false);
+    reopened.local_review.document = document.clone();
+    reopened.restore_reviewed_files();
+    assert!(reopened.reviewed_files.is_empty());
+    reopened.refresh_after(&["unsaved".into(), String::new()], 1);
+    assert_eq!(reopened.reviewed_files, BTreeSet::from([0]));
+    reopened.refresh_after(&["unsaved".into()], 2);
+    assert!(reopened.reviewed_files.is_empty());
+    assert!(reopened.local_review.document.reviewed_files.is_empty());
+    reopened.local_review.document = document;
+    reopened.restore_reviewed_files();
+    assert!(reopened.reviewed_files.is_empty());
+}
+
 #[test]
 fn working_review_marks_clear_only_for_changed_bytes_or_eof() {
     for (after, eof, lines) in [