feat: update backend OCR parser, web app, mobile app camera/preview UI, tests, and documentation with sample images

lib/features/camera/image_preview_screen.dart

@@ -2,7 +2,6 @@ import 'dart:io';
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:go_router/go_router.dart';
-import 'package:image/image.dart' as img;
 import '../../config/app_config.dart';
 import '../documents/pending_documents_provider.dart';
 import 'blur_detector.dart';
@@ -162,51 +161,7 @@ class _ImagePreviewScreenState extends ConsumerState<ImagePreviewScreen> {
     }
   }
 
-  Future<void> _rotateImage() async {
-    showDialog(
-      context: context,
-      barrierDismissible: false,
-      builder: (context) => const Center(
-        child: CircularProgressIndicator(color: AppConfig.primaryColor),
-      ),
-    );
 
-    try {
-      final bytes = await File(_currentImagePath).readAsBytes();
-      final decoded = img.decodeImage(bytes);
-      if (decoded != null) {
-        // Rotate 90 degrees clockwise
-        final rotated = img.copyRotate(decoded, angle: 90);
-        final encoded = img.encodeJpg(rotated);
-
-        final dir = Directory(_currentImagePath).parent.path;
-        final name = _currentImagePath.split('/').last.split('\\').last;
-        final newPath = '$dir/rotated_${DateTime.now().millisecondsSinceEpoch}_$name';
-
-        await File(newPath).writeAsBytes(encoded);
-
-        // Delete old rotated files to prevent memory leaks/leftovers
-        if (_currentImagePath.contains('rotated_')) {
-          try {
-            await File(_currentImagePath).delete();
-          } catch (_) {}
-        }
-
-        if (mounted) {
-          setState(() {
-            _currentImagePath = newPath;
-            _analyzing = true;
-          });
-          Navigator.pop(context); // Close loading dialog
-          _detectBlur(); // Re-run blur analysis
-        }
-      } else {
-        if (mounted) Navigator.pop(context);
-      }
-    } catch (e) {
-      if (mounted) Navigator.pop(context);
-    }
-  }
 
   @override
   Widget build(BuildContext context) {
@@ -214,13 +169,6 @@ class _ImagePreviewScreenState extends ConsumerState<ImagePreviewScreen> {
       backgroundColor: AppConfig.backgroundColor,
       appBar: AppBar(
         title: const Text('Konfirmasi Foto'),
-        actions: [
-          IconButton(
-            icon: const Icon(Icons.rotate_right),
-            onPressed: _rotateImage,
-            tooltip: 'Putar 90°',
-          ),
-        ],
       ),
       body: SafeArea(
         child: Column(
@@ -259,17 +207,6 @@ class _ImagePreviewScreenState extends ConsumerState<ImagePreviewScreen> {
                       ),
                     ),
                   ),
-                  Positioned(
-                    bottom: 24,
-                    right: 24,
-                    child: FloatingActionButton.small(
-                      heroTag: 'rotate_button',
-                      backgroundColor: Colors.white.withOpacity(0.9),
-                      foregroundColor: AppConfig.primaryColor,
-                      onPressed: _rotateImage,
-                      child: const Icon(Icons.rotate_right),
-                    ),
-                  ),
                 ],
               ),
             ),
@@ -346,7 +283,7 @@ class _ImagePreviewScreenState extends ConsumerState<ImagePreviewScreen> {
                       // Confirm & Sync Button
                       Expanded(
                         child: ElevatedButton(
-                          onPressed: (!_analyzing && _blurResult != null && !_blurResult!.isBlur) ? () {
+                          onPressed: !_analyzing ? () {
                             ref.read(pendingDocumentsProvider.notifier).addDocument(
                               _currentImagePath,
                               latitude: widget.latitude,