Use current DateTime when copying WeightEntry instead of previous.

Increment weight by 0.1 and round to one decimal place to prevent floating point accuracy (rounding) issues.

Author: sizzlesloth

lib/models/body_weight/weight_entry.dart

@@ -43,7 +43,7 @@ class WeightEntry {
   WeightEntry copyWith({int? id, int? weight, DateTime? date}) => WeightEntry(
         id: id,
         weight: weight ?? this.weight,
-        date: date ?? this.date,
+        date: date ?? DateTime.now(),
       );
 
   // Boilerplate

lib/widgets/weight/forms.dart

@@ -110,8 +110,8 @@ class WeightForm extends StatelessWidget {
                     icon: const FaIcon(FontAwesomeIcons.minus),
                     onPressed: () {
                       try {
-                        final num newValue = num.parse(weightController.text) - 0.25;
-                        weightController.text = newValue.toString();
+                        final num newValue = num.parse(weightController.text) - 0.1;
+                        weightController.text = newValue.toStringAsFixed(1);
                       } on FormatException {}
                     },
                   ),
@@ -125,8 +125,8 @@ class WeightForm extends StatelessWidget {
                     icon: const FaIcon(FontAwesomeIcons.plus),
                     onPressed: () {
                       try {
-                        final num newValue = num.parse(weightController.text) + 0.25;
-                        weightController.text = newValue.toString();
+                        final num newValue = num.parse(weightController.text) + 0.1;
+                        weightController.text = newValue.toStringAsFixed(1);
                       } on FormatException {}
                     },
                   ),