feat: jfif/jpe/wbmp format destegi, pencere cascade yerlesimi, konum kaydi duzeltmesi

- file_handler/image_manager: jfif, jpe, wbmp uzantilari
- .desktop + install.sh MimeType: image/vnd.wap.wbmp eklendi
- main.dart: yeni pencere oncekinin saginda acilir (screen_retriever ile ekran tespiti)
- viewer_screen: 2sn polling kaldirildi, konum kaydi tek akisa oturtuldu (acilis + move/resize debounce + close senkron)
- dist/rebuild-deb.sh: .desktop kaynaktan kopyalanir (MimeType/StartupWMClass guncel kalir)
- .deb guncellendi, docs: session-2026-08-03 + plan dokumanlari

lib/main.dart

@@ -25,7 +25,11 @@ void main(List<String> args) async {
 
   await windowManager.waitUntilReadyToShow(windowOptions, () async {
     if (saved != null) {
-      await windowManager.setPosition(saved.position);
+      final position = await WindowPersistence.cascadePosition(
+        previousPosition: saved.position,
+        previousSize: saved.size,
+      );
+      await windowManager.setPosition(position);
       await windowManager.setSize(saved.size);
     } else {
       await windowManager.center();
@@ -33,6 +37,11 @@ void main(List<String> args) async {
     await windowManager.setResizable(true);
     await windowManager.show();
     await windowManager.focus();
+
+    // Açılış konumunu hemen kaydet — sıradaki pencere güncel referans okusun
+    final pos = await windowManager.getPosition();
+    final size = await windowManager.getSize();
+    WindowPersistence.saveSync(position: pos, size: size);
   });
 
   // Extract file paths from command-line arguments

lib/screens/viewer_screen.dart

@@ -21,7 +21,6 @@ class _ViewerScreenState extends State<ViewerScreen> with WindowListener {
   bool _hasImages = false;
   bool _isDragging = false;
   Timer? _saveDebounce;
-  Timer? _pollTimer;
   Rect _lastBounds = Rect.zero;
 
   @override
@@ -35,29 +34,6 @@ class _ViewerScreenState extends State<ViewerScreen> with WindowListener {
         FileHandler.loadImagesFromPaths(widget.initialFiles);
       });
     }
-
-    // İlk kayıt + periyodik polling başlat
-    WidgetsBinding.instance.addPostFrameCallback((_) async {
-      await Future.delayed(const Duration(milliseconds: 200));
-      await _doSave();
-      _startPolling();
-    });
-  }
-
-  void _startPolling() {
-    _pollTimer?.cancel();
-    _pollTimer = Timer.periodic(const Duration(seconds: 2), (_) async {
-      try {
-        final bounds = await windowManager.getBounds();
-        if (bounds != _lastBounds) {
-          _lastBounds = bounds;
-          WindowPersistence.saveSync(
-            position: bounds.topLeft,
-            size: bounds.size,
-          );
-        }
-      } catch (_) {}
-    });
   }
 
   @override
@@ -65,7 +41,6 @@ class _ViewerScreenState extends State<ViewerScreen> with WindowListener {
     windowManager.removeListener(this);
     ImageManager.instance.removeListener(_onImageManagerChanged);
     _saveDebounce?.cancel();
-    _pollTimer?.cancel();
     super.dispose();
   }
 
@@ -74,10 +49,18 @@ class _ViewerScreenState extends State<ViewerScreen> with WindowListener {
   void onWindowEvent(String eventName) {
     switch (eventName) {
       case 'close':
-        _doSave();
+        // Senkron kayıt — async çağrı kapanışta tamamlanmayabilir
+        if (_lastBounds != Rect.zero) {
+          WindowPersistence.saveSync(
+            position: _lastBounds.topLeft,
+            size: _lastBounds.size,
+          );
+        }
         break;
       case 'resize':
       case 'move':
+        // Son bilinen konumu hemen güncelle (kapanış senkron kaydı için)
+        windowManager.getBounds().then((b) => _lastBounds = b).catchError((_) {});
         _saveDebounce?.cancel();
         _saveDebounce = Timer(const Duration(milliseconds: 300), () {
           _doSave();

lib/services/file_handler.dart

@@ -6,7 +6,7 @@ class FileHandler {
   static Future<void> openFileDialog() async {
     final result = await FilePicker.platform.pickFiles(
       type: FileType.custom,
-      allowedExtensions: ['png', 'jpg', 'jpeg', 'webp', 'bmp', 'gif'],
+      allowedExtensions: ['png', 'jpg', 'jpeg', 'jfif', 'jpe', 'webp', 'bmp', 'gif', 'wbmp'],
       allowMultiple: true,
     );
 

lib/services/image_manager.dart

@@ -21,7 +21,7 @@ class ImageManager extends ChangeNotifier {
   void addImages(List<String> paths) {
     final validPaths = paths.where((p) {
       final ext = p.toLowerCase().split('.').last;
-      const supported = ['png', 'jpg', 'jpeg', 'webp', 'bmp', 'gif'];
+      const supported = ['png', 'jpg', 'jpeg', 'jfif', 'jpe', 'webp', 'bmp', 'gif', 'wbmp'];
       return supported.contains(ext) && File(p).existsSync();
     }).toList();
 

lib/services/window_persistence.dart

@@ -1,6 +1,7 @@
 import 'dart:convert';
 import 'dart:io';
 import 'package:flutter/material.dart';
+import 'package:screen_retriever/screen_retriever.dart';
 
 /// Persists and restores window position and size.
 class WindowPersistence {
@@ -51,4 +52,38 @@ class WindowPersistence {
       return null;
     }
   }
+
+  /// Cascade: place new window to the right of the previous one.
+  /// Falls to the next row (row start) when it would overflow the screen,
+  /// and wraps to the top-left if the next row also overflows.
+  static Future<Offset> cascadePosition({
+    required Offset previousPosition,
+    required Size previousSize,
+  }) async {
+    try {
+      final display = await screenRetriever.getPrimaryDisplay();
+      final workLeft = display.visiblePosition?.dx ?? 0;
+      final workTop = display.visiblePosition?.dy ?? 0;
+      final workWidth = display.visibleSize?.width ?? display.size.width;
+      final workHeight = display.visibleSize?.height ?? display.size.height;
+
+      var x = previousPosition.dx + previousSize.width;
+      var y = previousPosition.dy;
+
+      if (x + previousSize.width > workLeft + workWidth) {
+        x = workLeft;
+        y = previousPosition.dy + previousSize.height;
+      }
+
+      if (y + previousSize.height > workTop + workHeight) {
+        x = workLeft;
+        y = workTop;
+      }
+
+      return Offset(x, y);
+    } catch (_) {
+      // Fallback: keep previous position if screen info is unavailable.
+      return previousPosition;
+    }
+  }
 }