feat: klasor tabanli galeri, brightness efekti (Ctrl+Shift+sag tik), .deb guncellendi

lib/services/image_manager.dart

@@ -6,6 +6,10 @@ class ImageManager extends ChangeNotifier {
   static ImageManager get instance => _instance;
   ImageManager._();
 
+  static const _supportedExtensions = [
+    'png', 'jpg', 'jpeg', 'jfif', 'jpe', 'webp', 'bmp', 'gif', 'wbmp',
+  ];
+
   final List<String> _images = [];
   int _currentIndex = 0;
 
@@ -18,22 +22,47 @@ class ImageManager extends ChangeNotifier {
     return _images[_currentIndex];
   }
 
-  void addImages(List<String> paths) {
-    final validPaths = paths.where((p) {
+  /// Açılan resmin bulunduğu klasörü galeri olarak kurar (en yeni önce).
+  void setGalleryFromPaths(List<String> paths) {
+    String? anchor;
+    for (final p in paths) {
       final ext = p.toLowerCase().split('.').last;
-      const supported = ['png', 'jpg', 'jpeg', 'jfif', 'jpe', 'webp', 'bmp', 'gif', 'wbmp'];
-      return supported.contains(ext) && File(p).existsSync();
-    }).toList();
-
-    if (validPaths.isEmpty) return;
-
-    _images.addAll(validPaths);
-
-    // Precache images
-    for (final path in validPaths) {
-      precacheImage(FileImage(File(path)), context!);
+      if (_supportedExtensions.contains(ext) && File(p).existsSync()) {
+        anchor = p;
+        break;
+      }
     }
+    if (anchor == null) return;
 
+    final dir = File(anchor).parent;
+    if (!dir.existsSync()) return;
+
+    final List<(String, DateTime)> entries = [];
+    for (final entity in dir.listSync()) {
+      if (entity is! File) continue;
+      final p = entity.path;
+      final ext = p.toLowerCase().split('.').last;
+      if (!_supportedExtensions.contains(ext)) continue;
+      try {
+        entries.add((p, entity.lastModifiedSync()));
+      } catch (_) {}
+    }
+    entries.sort((a, b) {
+      final byDate = b.$2.compareTo(a.$2);
+      return byDate != 0 ? byDate : a.$1.compareTo(b.$1);
+    });
+
+    _images
+      ..clear()
+      ..addAll(entries.map((e) => e.$1));
+
+    _currentIndex = _images.indexOf(anchor);
+    if (_currentIndex < 0) {
+      final base = anchor.split(Platform.pathSeparator).last;
+      _currentIndex = _images
+          .indexWhere((p) => p.split(Platform.pathSeparator).last == base);
+    }
+    if (_currentIndex < 0) _currentIndex = 0;
     notifyListeners();
   }
 
@@ -55,19 +84,12 @@ class ImageManager extends ChangeNotifier {
     notifyListeners();
   }
 
-  // Precache needs a BuildContext
-  BuildContext? context;
-
   /// Configure image cache for high-res images
   static void configureCache() {
     PaintingBinding.instance.imageCache.maximumSize = 1000;
     PaintingBinding.instance.imageCache.maximumSizeBytes = 1024 * 1024 * 1024; // 1 GB
   }
 
-  set buildContext(BuildContext ctx) {
-    context = ctx;
-  }
-
   void clear() {
     _images.clear();
     _currentIndex = 0;