Sort search results by date, newest first

lib/main.dart

@@ -755,6 +755,9 @@ class MainPageState extends State<MainPage> with WindowListener {
                                       .where((note) => note.content.isNotEmpty)
                                       .toList();
 
+                              // Sort by date, newest first
+                              filteredResults.sort((a, b) => b.date.compareTo(a.date));
+
                               // Important: update the dialog state after search completes
                               dialogSetState(() {
                                 _searchResults = filteredResults;