feat: persist diff file review checkmarks

src/editor_review.rs

@@ -264,6 +264,7 @@ impl Editor {
         state.selected = None;
         state.pending_navigation = None;
         state.dirty = dirty;
+        self.review_diff_mut().unwrap().restore_reviewed_files();
         // Persistence failure leaves the identity change applied and unsaved.
         self.autosave_local_review()?;
         self.open_review_overview()