fix: coklu monitorde cascade dogru ekrani kullanir, .deb guncellendi

- window_persistence: onceki pencerenin bulundugu monitorun calisma alani kullanilir (getAllDisplays), primary degil
- viewer_screen: catchError donus tipi duzeltildi (analyze warning)
- dist/imajviewer_1.0.0_amd64.deb yeniden derlendi

lib/screens/viewer_screen.dart

@@ -60,7 +60,7 @@ class _ViewerScreenState extends State<ViewerScreen> with WindowListener {
       case 'resize':
       case 'move':
         // Son bilinen konumu hemen güncelle (kapanış senkron kaydı için)
-        windowManager.getBounds().then((b) => _lastBounds = b).catchError((_) {});
+        windowManager.getBounds().then((b) => _lastBounds = b).catchError((_) => _lastBounds);
         _saveDebounce?.cancel();
         _saveDebounce = Timer(const Duration(milliseconds: 300), () {
           _doSave();

lib/services/window_persistence.dart

@@ -61,7 +61,23 @@ class WindowPersistence {
     required Size previousSize,
   }) async {
     try {
-      final display = await screenRetriever.getPrimaryDisplay();
+      final displays = await screenRetriever.getAllDisplays();
+
+      // Önceki pencerenin bulunduğu monitörü bul (çoklu monitör desteği)
+      Display display = await screenRetriever.getPrimaryDisplay();
+      for (final d in displays) {
+        final pos = d.visiblePosition;
+        final size = d.visibleSize ?? d.size;
+        if (pos != null &&
+            previousPosition.dx >= pos.dx &&
+            previousPosition.dx < pos.dx + size.width &&
+            previousPosition.dy >= pos.dy &&
+            previousPosition.dy < pos.dy + size.height) {
+          display = d;
+          break;
+        }
+      }
+
       final workLeft = display.visiblePosition?.dx ?? 0;
       final workTop = display.visiblePosition?.dy ?? 0;
       final workWidth = display.visibleSize?.width ?? display.size.width;