Autocalibration de la cible sur le centre de la cible ok + petite correction de la distortion mais pas tres fonctionnel

lib/features/capture/capture_screen.dart

@@ -6,7 +6,7 @@
 library;
 
 import 'dart:io';
-import 'package:cunning_document_scanner/cunning_document_scanner.dart';
+import 'package:google_mlkit_document_scanner/google_mlkit_document_scanner.dart';
 import 'package:flutter/material.dart';
 import 'package:image_picker/image_picker.dart';
 import '../../core/constants/app_constants.dart';
@@ -84,8 +84,8 @@ class _CaptureScreenState extends State<CaptureScreen> {
       floatingActionButton: _selectedImagePath != null
           ? FloatingActionButton.extended(
               onPressed: _analyzeImage,
-              icon: const Icon(Icons.analytics),
-              label: const Text('Analyser'),
+              icon: const Icon(Icons.arrow_forward),
+              label: const Text('Suivant'),
             )
           : null,
     );
@@ -205,10 +205,18 @@ class _CaptureScreenState extends State<CaptureScreen> {
     setState(() => _isLoading = true);
 
     try {
-      final List<String>? pictures = await CunningDocumentScanner.getPictures();
+      final options = DocumentScannerOptions(
+        documentFormat: DocumentFormat.jpeg,
+        mode: ScannerMode.base,
+        pageLimit: 1,
+        isGalleryImport: false,
+      );
 
-      if (pictures != null && pictures.isNotEmpty) {
-        setState(() => _selectedImagePath = pictures.first);
+      final scanner = DocumentScanner(options: options);
+      final documents = await scanner.scanDocument();
+
+      if (documents.images.isNotEmpty) {
+        setState(() => _selectedImagePath = documents.images.first);
       }
     } catch (e) {
       if (mounted) {

lib/features/crop/widgets/crop_overlay.dart

@@ -13,20 +13,13 @@ class CropOverlay extends StatelessWidget {
   /// Afficher la grille des tiers
   final bool showGrid;
 
-  const CropOverlay({
-    super.key,
-    required this.cropSize,
-    this.showGrid = true,
-  });
+  const CropOverlay({super.key, required this.cropSize, this.showGrid = true});
 
   @override
   Widget build(BuildContext context) {
     return CustomPaint(
       size: Size.infinite,
-      painter: _CropOverlayPainter(
-        cropSize: cropSize,
-        showGrid: showGrid,
-      ),
+      painter: _CropOverlayPainter(cropSize: cropSize, showGrid: showGrid),
     );
   }
 }
@@ -35,10 +28,7 @@ class _CropOverlayPainter extends CustomPainter {
   final double cropSize;
   final bool showGrid;
 
-  _CropOverlayPainter({
-    required this.cropSize,
-    required this.showGrid,
-  });
+  _CropOverlayPainter({required this.cropSize, required this.showGrid});
 
   @override
   void paint(Canvas canvas, Size size) {
@@ -77,6 +67,9 @@ class _CropOverlayPainter extends CustomPainter {
     if (showGrid) {
       _drawGrid(canvas, cropRect);
     }
+
+    // Dessiner le point central (croix)
+    _drawCenterPoint(canvas, cropRect);
   }
 
   void _drawCorners(Canvas canvas, Rect rect) {
@@ -171,6 +164,38 @@ class _CropOverlayPainter extends CustomPainter {
     );
   }
 
+  void _drawCenterPoint(Canvas canvas, Rect rect) {
+    final centerPaint = Paint()
+      ..color = Colors.white.withValues(alpha: 0.8)
+      ..style = PaintingStyle.stroke
+      ..strokeWidth = 2;
+
+    const size = 10.0;
+    final centerX = rect.center.dx;
+    final centerY = rect.center.dy;
+
+    // Ligne horizontale
+    canvas.drawLine(
+      Offset(centerX - size, centerY),
+      Offset(centerX + size, centerY),
+      centerPaint,
+    );
+
+    // Ligne verticale
+    canvas.drawLine(
+      Offset(centerX, centerY - size),
+      Offset(centerX, centerY + size),
+      centerPaint,
+    );
+
+    // Petit cercle central pour précision (optionnel, mais aide à viser)
+    canvas.drawCircle(
+      rect.center,
+      2,
+      Paint()..color = Colors.red.withValues(alpha: 0.6),
+    );
+  }
+
   @override
   bool shouldRepaint(covariant _CropOverlayPainter oldDelegate) {
     return cropSize != oldDelegate.cropSize || showGrid != oldDelegate.showGrid;