update edit and list and detail view

lib/model/filament_model.dart

@@ -11,7 +11,7 @@ class FilamentModel {
   final String? manufacturer;
   final String? purchaseDate;
   final String? notes;
-  final int? pices;
+  final int pices;
   final int? printingTemp;
   final int? bedTemp;
 
@@ -26,9 +26,9 @@ class FilamentModel {
     this.manufacturer,
     this.purchaseDate,
     this.notes,
-    this.pices,
+    required this.pices,
     this.printingTemp,
-    this.bedTemp
+    this.bedTemp,
   });
 
   // JSON Serialisierung
@@ -46,7 +46,7 @@ class FilamentModel {
       'pices': pices,
       'printingTemp': printingTemp,
       'bedTemp': bedTemp,
-      'printWeightUsed': weightUsed,
+      'weightUsed': weightUsed,
     };
   }
 
@@ -57,13 +57,13 @@ class FilamentModel {
       name: json['name'] as String,
       type: json['type'] as String,
       color: json['color'] as String,
-      weight: (json['weight'] as num).toDouble(),
-      weightUsed: (json['weightUsed'] as num).toDouble(),
+      weight: (json['weight'] as num?)?.toDouble() ?? 0.0,
+      weightUsed: (json['weightUsed'] as num?)?.toDouble() ?? 0.0,
       price: (json['price'] as num).toDouble(),
       manufacturer: json['manufacturer'] as String?,
       purchaseDate: json['purchaseDate'] as String?,
       notes: json['notes'] as String?,
-      pices: json['pices'] as int?,
+      pices: json['pices'] as int,
       printingTemp: json['printingTemp'] as int?,
       bedTemp: json['bedTemp'] as int?,
     );