perf: efekt suruklemesinde kitlenme fix (kare hizi throttle, repaint izolasyonu, downsampling, cache sinirlari), .deb guncellendi

lib/services/image_manager.dart

@@ -63,6 +63,9 @@ class ImageManager extends ChangeNotifier {
           .indexWhere((p) => p.split(Platform.pathSeparator).last == base);
     }
     if (_currentIndex < 0) _currentIndex = 0;
+
+    // Eski klasörün decode edilmiş görsellerini bırak; canlı görsel korunur
+    PaintingBinding.instance.imageCache.clear();
     notifyListeners();
   }
 
@@ -86,8 +89,8 @@ class ImageManager extends ChangeNotifier {
 
   /// Configure image cache for high-res images
   static void configureCache() {
-    PaintingBinding.instance.imageCache.maximumSize = 1000;
-    PaintingBinding.instance.imageCache.maximumSizeBytes = 1024 * 1024 * 1024; // 1 GB
+    PaintingBinding.instance.imageCache.maximumSize = 16;
+    PaintingBinding.instance.imageCache.maximumSizeBytes = 256 * 1024 * 1024; // 256 MB
   }
 
   void clear() {

lib/widgets/image_canvas.dart

@@ -2,6 +2,7 @@ import 'dart:io';
 import 'dart:math' as math;
 import 'package:flutter/material.dart';
 import 'package:flutter/gestures.dart';
+import 'package:flutter/scheduler.dart';
 import 'package:flutter/services.dart';
 
 class ImageCanvas extends StatefulWidget {
@@ -37,6 +38,19 @@ class _ImageCanvasState extends State<ImageCanvas> {
   bool _ctrlPressed = false;
   bool _shiftPressed = false;
 
+  // ── Kare hızına eşitlenmiş render tick ──
+  final ValueNotifier<int> _renderTick = ValueNotifier(0);
+  bool _frameScheduled = false;
+
+  void _markRenderDirty() {
+    if (_frameScheduled) return;
+    _frameScheduled = true;
+    SchedulerBinding.instance.scheduleFrameCallback((_) {
+      _frameScheduled = false;
+      _renderTick.value++;
+    });
+  }
+
   void _clamp() {
     if (_vpSize.width <= 0 || _vpSize.height <= 0) return;
     if (_angle != 0) return; // rotate varsa serbest pan
@@ -107,6 +121,7 @@ class _ImageCanvasState extends State<ImageCanvas> {
   @override
   void dispose() {
     HardwareKeyboard.instance.removeHandler(_onHardwareKey);
+    _renderTick.dispose();
     super.dispose();
   }
 
@@ -139,17 +154,15 @@ class _ImageCanvasState extends State<ImageCanvas> {
   }
 
   void _resetView() {
-    setState(() {
-      _tx = 0; _ty = 0; _sc = 1.0; _isFilled = true; _vpSize = Size.zero;
-      _angle = 0; _contrast = 1.0; _saturation = 1.0; _brightness = 0;
-    });
+    _tx = 0; _ty = 0; _sc = 1.0; _isFilled = true; _vpSize = Size.zero;
+    _angle = 0; _contrast = 1.0; _saturation = 1.0; _brightness = 0;
+    _markRenderDirty();
   }
 
   void _toggleFillFit() {
-    setState(() {
-      _isFilled = !_isFilled; _tx = 0; _ty = 0; _sc = 1.0; _vpSize = Size.zero;
-      _angle = 0; _contrast = 1.0; _saturation = 1.0; _brightness = 0;
-    });
+    _isFilled = !_isFilled; _tx = 0; _ty = 0; _sc = 1.0; _vpSize = Size.zero;
+    _angle = 0; _contrast = 1.0; _saturation = 1.0; _brightness = 0;
+    _markRenderDirty();
   }
 
   void _handleDoubleTap() => _toggleFillFit();
@@ -175,14 +188,14 @@ class _ImageCanvasState extends State<ImageCanvas> {
     }
     _sc = newSc;
     _clamp();
-    setState(() {});
+    _markRenderDirty();
   }
 
   void _onPanUpdate(DragUpdateDetails d) {
     _tx += d.delta.dx;
     _ty += d.delta.dy;
     _clamp();
-    setState(() {});
+    _markRenderDirty();
   }
 
   void _onPointerDown(PointerDownEvent e) {
@@ -194,13 +207,12 @@ class _ImageCanvasState extends State<ImageCanvas> {
     if (_lastRightTapTime != null &&
         now.difference(_lastRightTapTime!) < const Duration(milliseconds: 400) &&
         (e.localPosition - _lastRightTapPos).distance < 20) {
-      setState(() {
-        _angle = 0;
-        _contrast = 1.0;
-        _saturation = 1.0;
-        _brightness = 0;
-        _interactionMode = 'none';
-      });
+      _angle = 0;
+      _contrast = 1.0;
+      _saturation = 1.0;
+      _brightness = 0;
+      _interactionMode = 'none';
+      _markRenderDirty();
       _lastRightTapTime = null;
       return;
     }
@@ -229,26 +241,19 @@ class _ImageCanvasState extends State<ImageCanvas> {
 
     switch (_interactionMode) {
       case 'contrast':
-        setState(() {
-          _contrast = (_startContrast + dy * 0.005).clamp(0.0, 2.0);
-        });
+        _contrast = (_startContrast + dy * 0.005).clamp(0.0, 2.0);
         break;
       case 'rotate':
-        setState(() {
-          _angle = _startAngle + dy * 0.9;
-        });
+        _angle = _startAngle + dy * 0.9;
         break;
       case 'saturation':
-        setState(() {
-          _saturation = (_startSaturation + dy * 0.005).clamp(0.0, 2.0);
-        });
+        _saturation = (_startSaturation + dy * 0.005).clamp(0.0, 2.0);
         break;
       case 'brightness':
-        setState(() {
-          _brightness = (_startBrightness + dy * 0.5).clamp(-100.0, 100.0);
-        });
+        _brightness = (_startBrightness + dy * 0.5).clamp(-100.0, 100.0);
         break;
     }
+    _markRenderDirty();
   }
 
   void _onPointerUp(PointerUpEvent e) {
@@ -334,9 +339,15 @@ class _ImageCanvasState extends State<ImageCanvas> {
   }
 
   Widget _buildImage() {
-    return Image.file(
+    final longest = _vpSize.longestSide;
+    final cacheWidth = longest > 0 ? (longest * 2).round() : null;
+    final ImageProvider<Object> provider = cacheWidth != null
+        ? ResizeImage.resizeIfNeeded(
+            cacheWidth, null, FileImage(File(widget.filePath)))
+        : FileImage(File(widget.filePath));
+    return Image(
       key: _imageKey,
-      File(widget.filePath),
+      image: provider,
       fit: _isFilled ? BoxFit.cover : BoxFit.contain,
       filterQuality: FilterQuality.high,
       errorBuilder: (_, _, _) => _errorWidget(),
@@ -349,65 +360,73 @@ class _ImageCanvasState extends State<ImageCanvas> {
       builder: (context, constraints) {
         _vpSize = constraints.biggest;
         _clamp();
-
-        final vpCenterX = _vpSize.width / 2;
-        final vpCenterY = _vpSize.height / 2;
-        final angleRad = _angle * math.pi / 180;
-
-        Widget imageContent = Builder(
-          builder: (context) {
-            final hasFilter = _saturation != 1.0 || _contrast != 1.0 || _brightness != 0.0;
-            final image = _isFilled
-                ? SizedBox.expand(child: _buildImage())
-                : Center(child: _buildImage());
-            return hasFilter
-                ? ColorFiltered(colorFilter: _buildCombinedFilter(), child: image)
-                : image;
-          },
-        );
-
-        if (_angle != 0) {
-          imageContent = Transform(
-            alignment: Alignment.topLeft,
-            transform: Matrix4.identity()
-              ..translate(vpCenterX, vpCenterY)
-              ..rotateZ(angleRad)
-              ..translate(-vpCenterX, -vpCenterY),
-            child: imageContent,
-          );
-        }
-
-        return SizedBox.expand(
-          child: Stack(
-            children: [
-              ClipRect(
-                child: Listener(
-                  onPointerDown: _onPointerDown,
-                  onPointerMove: _onPointerMove,
-                  onPointerUp: _onPointerUp,
-                  onPointerSignal: (event) {
-                    if (event is PointerScrollEvent) _handleScroll(event);
-                  },
-                  child: GestureDetector(
-                    onDoubleTap: _handleDoubleTap,
-                    onPanUpdate: _onPanUpdate,
-                    child: Transform(
-                      alignment: Alignment.topLeft,
-                      transform: Matrix4.identity()
-                        ..translate(_tx, _ty)
-                        ..scale(_sc),
-                      child: imageContent,
-                    ),
-                  ),
-                ),
-              ),
-            ],
+        return RepaintBoundary(
+          child: ValueListenableBuilder<int>(
+            valueListenable: _renderTick,
+            builder: (context, _, _) => _buildRenderLayer(),
           ),
         );
       },
     );
   }
 
+  Widget _buildRenderLayer() {
+    final vpCenterX = _vpSize.width / 2;
+    final vpCenterY = _vpSize.height / 2;
+    final angleRad = _angle * math.pi / 180;
+
+    Widget imageContent = Builder(
+      builder: (context) {
+        final hasFilter = _saturation != 1.0 || _contrast != 1.0 || _brightness != 0.0;
+        final image = _isFilled
+            ? SizedBox.expand(child: _buildImage())
+            : Center(child: _buildImage());
+        return hasFilter
+            ? ColorFiltered(colorFilter: _buildCombinedFilter(), child: image)
+            : image;
+      },
+    );
+
+    if (_angle != 0) {
+      imageContent = Transform(
+        alignment: Alignment.topLeft,
+        transform: Matrix4.identity()
+          ..translate(vpCenterX, vpCenterY)
+          ..rotateZ(angleRad)
+          ..translate(-vpCenterX, -vpCenterY),
+        child: imageContent,
+      );
+    }
+
+    return SizedBox.expand(
+      child: Stack(
+        children: [
+          ClipRect(
+            child: Listener(
+              onPointerDown: _onPointerDown,
+              onPointerMove: _onPointerMove,
+              onPointerUp: _onPointerUp,
+              onPointerSignal: (event) {
+                if (event is PointerScrollEvent) _handleScroll(event);
+              },
+              child: GestureDetector(
+                onDoubleTap: _handleDoubleTap,
+                onPanUpdate: _onPanUpdate,
+                child: Transform(
+                  alignment: Alignment.topLeft,
+                  transform: Matrix4.identity()
+                    ..translate(_tx, _ty)
+                    ..scale(_sc),
+                  child: imageContent,
+                ),
+              ),
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+
   Widget _errorWidget() {
     return const Center(
       child: Column(