feat: Ctrl+Shift+Q ile tum pencereleri kapat

lib/shortcuts/app_shortcuts.dart

@@ -1,3 +1,4 @@
+import 'dart:io';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:window_manager/window_manager.dart';
@@ -49,6 +50,14 @@ class AppShortcuts extends StatelessWidget {
           ): () {
             windowManager.close();
           },
+          // Tüm imajviewer pencerelerini kapat
+          const SingleActivator(
+            LogicalKeyboardKey.keyQ,
+            control: true,
+            shift: true,
+          ): () {
+            Process.run('pkill', ['imajviewer']);
+          },
         },
         child: child,
       ),