fix: ok tuşları + buton hover/siyah border + çift tıklama cover

lib/shortcuts/app_shortcuts.dart

@@ -11,16 +11,28 @@ class AppShortcuts extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return CallbackShortcuts(
+    return Focus(
-      bindings: {
+      autofocus: true,
-        // Navigate images
+      onKeyEvent: (node, event) {
-        const SingleActivator(LogicalKeyboardKey.arrowLeft): () {
+        if (event is KeyDownEvent) {
+          switch (event.logicalKey) {
+            case LogicalKeyboardKey.arrowLeft:
               ImageManager.instance.previousImage();
-        },
+              return KeyEventResult.handled;
-        const SingleActivator(LogicalKeyboardKey.arrowRight): () {
+            case LogicalKeyboardKey.arrowRight:
               ImageManager.instance.nextImage();
+              return KeyEventResult.handled;
+            case LogicalKeyboardKey.escape:
+              windowManager.isFullScreen().then((isFullscreen) {
+                if (isFullscreen) windowManager.setFullScreen(false);
+              });
+              return KeyEventResult.handled;
+          }
+        }
+        return KeyEventResult.ignored;
       },
-
+      child: CallbackShortcuts(
+        bindings: {
           // Open file dialog
           const SingleActivator(
             LogicalKeyboardKey.keyO,
@@ -35,14 +47,6 @@ class AppShortcuts extends StatelessWidget {
             await windowManager.setFullScreen(!isFullscreen);
           },
 
-        // Exit fullscreen
-        const SingleActivator(LogicalKeyboardKey.escape): () async {
-          final isFullscreen = await windowManager.isFullScreen();
-          if (isFullscreen) {
-            await windowManager.setFullScreen(false);
-          }
-        },
-
           // Quit
           const SingleActivator(
             LogicalKeyboardKey.keyQ,
@@ -51,8 +55,6 @@ class AppShortcuts extends StatelessWidget {
             windowManager.close();
           },
         },
-      child: Focus(
-        autofocus: true,
         child: child,
       ),
     );

lib/widgets/custom_title_bar.dart

@@ -41,22 +41,45 @@ class CustomTitleBar extends StatelessWidget {
   }
 }
 
-class _BarButton extends StatelessWidget {
+class _BarButton extends StatefulWidget {
   final IconData icon;
   final VoidCallback onTap;
 
   const _BarButton({required this.icon, required this.onTap});
 
+  @override
+  State<_BarButton> createState() => _BarButtonState();
+}
+
+class _BarButtonState extends State<_BarButton> {
+  bool _hovered = false;
+
   @override
   Widget build(BuildContext context) {
     return GestureDetector(
-      onTap: onTap,
+      onTap: widget.onTap,
       child: MouseRegion(
         cursor: SystemMouseCursors.click,
-        child: SizedBox(
+        onEnter: (_) => setState(() => _hovered = true),
+        onExit: (_) => setState(() => _hovered = false),
+        child: Container(
           width: 36,
           height: 28,
-          child: Icon(icon, color: Colors.white54, size: 16),
+          decoration: BoxDecoration(
+            border: Border.all(
+              color: Colors.black54,
+              width: 1,
+            ),
+            color: _hovered ? Colors.red.withValues(alpha: 0.7) : Colors.transparent,
+            borderRadius: const BorderRadius.only(
+              topRight: Radius.circular(4),
+            ),
+          ),
+          child: Icon(
+            widget.icon,
+            color: Colors.white,
+            size: 14,
+          ),
         ),
       ),
     );

lib/widgets/image_canvas.dart

@@ -112,10 +112,11 @@ class _ImageCanvasState extends State<ImageCanvas> {
               maxScale: 10.0,
               panEnabled: true,
               scaleEnabled: false,
-              child: Center(
+              child: _isFilled
+                  ? SizedBox.expand(
                       child: Image.file(
                         File(widget.filePath),
-                  fit: _isFilled ? BoxFit.cover : BoxFit.contain,
+                        fit: BoxFit.cover,
                         filterQuality: FilterQuality.high,
                         errorBuilder: (context, error, stackTrace) {
                           return const Center(
@@ -124,10 +125,28 @@ class _ImageCanvasState extends State<ImageCanvas> {
                               children: [
                                 Icon(Icons.broken_image, size: 48, color: Colors.white38),
                                 SizedBox(height: 8),
-                          Text(
+                                Text('Resim yüklenemedi',
-                            'Resim yüklenemedi',
+                                    style: TextStyle(color: Colors.white38)),
-                            style: TextStyle(color: Colors.white38),
+                              ],
                             ),
+                          );
+                        },
+                      ),
+                    )
+                  : Center(
+                      child: Image.file(
+                        File(widget.filePath),
+                        fit: BoxFit.contain,
+                        filterQuality: FilterQuality.high,
+                        errorBuilder: (context, error, stackTrace) {
+                          return const Center(
+                            child: Column(
+                              mainAxisSize: MainAxisSize.min,
+                              children: [
+                                Icon(Icons.broken_image, size: 48, color: Colors.white38),
+                                SizedBox(height: 8),
+                                Text('Resim yüklenemedi',
+                                    style: TextStyle(color: Colors.white38)),
                               ],
                             ),
                           );