add service for appwrite

lib/widgets/add_weight_dialog.dart

@@ -6,6 +6,7 @@ import 'package:intl/intl.dart';
 import '../models/home_model.dart';
 
 class AddWeightDialog extends StatefulWidget {
+  final String userId;
   final String personName;
 
   /// Letztes bekanntes Gewicht dieser Person – wird für weightChange benötigt.
@@ -16,6 +17,7 @@ class AddWeightDialog extends StatefulWidget {
 
   const AddWeightDialog({
     super.key,
+    required this.userId,
     required this.personName,
     required this.lastWeight,
     this.existingEntry,
@@ -23,11 +25,16 @@ class AddWeightDialog extends StatefulWidget {
 
   /// Öffnet den Dialog zum Hinzufügen eines neuen Eintrags.
   static Future<WeightModel?> show({
+    required String userId,
     required String personName,
     required double lastWeight,
   }) {
     return Get.dialog<WeightModel>(
-      AddWeightDialog(personName: personName, lastWeight: lastWeight),
+      AddWeightDialog(
+        userId: userId,
+        personName: personName,
+        lastWeight: lastWeight,
+      ),
       barrierColor: Colors.black.withValues(alpha: 0.55),
     );
   }
@@ -40,6 +47,7 @@ class AddWeightDialog extends StatefulWidget {
   }) {
     return Get.dialog<WeightModel>(
       AddWeightDialog(
+        userId: entry.documentId,
         personName: entry.name,
         lastWeight: previousWeight,
         existingEntry: entry,
@@ -135,9 +143,10 @@ class _AddWeightDialogState extends State<AddWeightDialog>
     final name = _nameController.text.trim();
     final entry = WeightModel(
       // Im Edit-Modus dieselbe ID behalten
-      id:
-          widget.existingEntry?.id ??
+      documentId:
+          widget.existingEntry?.documentId ??
           DateTime.now().millisecondsSinceEpoch.toString(),
+
       name: name,
       weight: _parsedWeight!,
       date: _selectedDate,