Track original scratch content to only write scratch when modified

lib/main.dart

@@ -313,6 +313,7 @@ class MainPageState extends State<MainPage> with WindowListener {
   Note? _currentlyDisplayedNote;
   Duration _currentPopupInterval = _defaultPopupInterval;
   String _currentNotificationSound = _defaultNotificationSound;
+  String? _originalScratchContent; // Track original scratch content
 
   bool _canGoPrevious = false;
   bool _canGoNext = false;
@@ -562,6 +563,7 @@ class MainPageState extends State<MainPage> with WindowListener {
 
     final scratch = await getLatestScratch();
     _scratchController.text = scratch?.content ?? "";
+    _originalScratchContent = scratch?.content; // Store original content
 
     await _checkNavigation();
 
@@ -596,9 +598,10 @@ class MainPageState extends State<MainPage> with WindowListener {
       _currentEntryController.clear(); // Clear the input field after saving
     }
 
-    if (scratchContent != _scratchController.text) {
-      // Was modified
+    // Only create new scratch if content has changed
+    if (scratchContent != _originalScratchContent) {
       await createScratch(scratchContent);
+      _originalScratchContent = scratchContent; // Update original content
     }
 
     // Handle previous/currently displayed note