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

lib/features/editor/editor_screen.dart

@@ -78,8 +78,8 @@ class _EditorScreenState extends ConsumerState<EditorScreen> {
         _platTrukCtrl.text = doc.platTruk;
         _namaDriverCtrl.text = doc.namaDriver;
         
-        final lat = doc.latitude ?? pendingDoc.latitude;
-        final lng = doc.longitude ?? pendingDoc.longitude;
+        final lat = pendingDoc.latitude ?? doc.latitude;
+        final lng = pendingDoc.longitude ?? doc.longitude;
         _latitudeCtrl.text = lat != null ? lat.toString() : '-';
         _longitudeCtrl.text = lng != null ? lng.toString() : '-';
         
@@ -228,8 +228,8 @@ class _EditorScreenState extends ConsumerState<EditorScreen> {
       (doc) => doc.id == widget.pendingId, 
       orElse: () => PendingDocument(id: '', imagePath: '')
     );
-    final double? finalLat = _document?.latitude ?? pendingDoc.latitude;
-    final double? finalLng = _document?.longitude ?? pendingDoc.longitude;
+    final double? finalLat = pendingDoc.latitude ?? _document?.latitude;
+    final double? finalLng = pendingDoc.longitude ?? _document?.longitude;
 
     final finalDoc = DocumentModel(
       id: _document?.id ?? DateTime.now().millisecondsSinceEpoch.toString(),
@@ -295,10 +295,12 @@ class _EditorScreenState extends ConsumerState<EditorScreen> {
     }
 
     if (mounted) {
-      context.pop(); // Go back to documents list
+      // Show SnackBar BEFORE pop so context is still valid
       ScaffoldMessenger.of(context).showSnackBar(
         const SnackBar(content: Text('Document Saved Successfully!'), backgroundColor: AppConfig.successColor),
       );
+      // Pass true as result so DocumentsScreen's .then() knows to reload
+      context.pop(true);
     }
   }