Fix prediction units and stabilize tests

lib/screens/prediction/prediction_controller.dart

@@ -387,8 +387,8 @@ class PredictionController extends ChangeNotifier {
   }
 
   String formatQuantityWithUnit(double amount, String unit) {
-    final displayUnit = _displayUnitLabel(unit);
-    return '${formatQuantity(amount)} $displayUnit';
+    final display = _displayQuantity(amount, unit);
+    return '${formatQuantity(display['value'] as double)} ${display['unit'] as String}';
   }
 
   String formatStockQuantity(String ingredient, double value) {
@@ -415,14 +415,46 @@ class PredictionController extends ChangeNotifier {
 
   String _displayUnitLabel(String unit) {
     final normalized = _normalizeUnit(unit);
-    if (normalized == 'gr') return 'kg';
-    if (normalized == 'ml') return 'L';
+    if (normalized == 'gr') return 'gr';
+    if (normalized == 'ml') return 'ml';
     if (normalized == 'l') return 'L';
     if (normalized == 'kg') return 'kg';
     if (normalized == 'butir') return 'butir';
     return unit.trim().isEmpty ? 'unit' : unit.trim();
   }
 
+  Map<String, dynamic> _displayQuantity(double amount, String unit) {
+    final normalized = _normalizeUnit(unit);
+
+    if (normalized == 'gr') {
+      if (amount >= 1000) {
+        return {'value': amount / 1000, 'unit': 'kg'};
+      }
+      return {'value': amount, 'unit': 'gr'};
+    }
+
+    if (normalized == 'ml') {
+      if (amount >= 1000) {
+        return {'value': amount / 1000, 'unit': 'L'};
+      }
+      return {'value': amount, 'unit': 'ml'};
+    }
+
+    if (normalized == 'l') {
+      return {'value': amount, 'unit': 'L'};
+    }
+
+    if (normalized == 'butir') {
+      return {'value': amount, 'unit': 'butir'};
+    }
+
+    if (normalized == 'kg') {
+      return {'value': amount, 'unit': 'kg'};
+    }
+
+    return {'value': amount, 'unit': _displayUnitLabel(unit)};
+  }
+
   double _toDouble(dynamic value) {
     if (value is num) return value.toDouble();
     return double.tryParse(value?.toString() ?? '') ?? 0;

lib/screens/products/product_list_controller.dart

@@ -156,20 +156,52 @@ class ProductListController extends ChangeNotifier {
   }
 
   String formatQuantityWithUnit(double amount, String rawUnit) {
-    final displayUnit = _displayUnitLabel(rawUnit);
-    return '${formatStock(amount)} $displayUnit';
+    final display = _displayQuantity(amount, rawUnit);
+    return '${formatStock(display['value'] as double)} ${display['unit'] as String}';
   }
 
   String _displayUnitLabel(String unit) {
     final normalized = _normalizeUnit(unit);
     if (normalized == 'pcs' || normalized == 'butir') return 'pcs';
-    if (normalized == 'gr') return 'kg';
-    if (normalized == 'ml') return 'L';
+    if (normalized == 'gr') return 'gr';
+    if (normalized == 'ml') return 'ml';
     if (normalized == 'l') return 'L';
     if (normalized == 'kg') return 'kg';
     return unit.trim().isEmpty ? 'kg' : unit.trim();
   }
 
+  Map<String, dynamic> _displayQuantity(double amount, String unit) {
+    final normalized = _normalizeUnit(unit);
+
+    if (normalized == 'gr') {
+      if (amount >= 1000) {
+        return {'value': amount / 1000, 'unit': 'kg'};
+      }
+      return {'value': amount, 'unit': 'gr'};
+    }
+
+    if (normalized == 'ml') {
+      if (amount >= 1000) {
+        return {'value': amount / 1000, 'unit': 'L'};
+      }
+      return {'value': amount, 'unit': 'ml'};
+    }
+
+    if (normalized == 'l') {
+      return {'value': amount, 'unit': 'L'};
+    }
+
+    if (normalized == 'pcs' || normalized == 'butir') {
+      return {'value': amount, 'unit': 'pcs'};
+    }
+
+    if (normalized == 'kg') {
+      return {'value': amount, 'unit': 'kg'};
+    }
+
+    return {'value': amount, 'unit': _displayUnitLabel(unit)};
+  }
+
   String _normalizeUnit(String unit) {
     final normalized = unit.trim().toLowerCase();
     if (['g', 'gr', 'gram', 'grams'].contains(normalized)) return 'gr';

test/widget_test.dart

@@ -1,30 +1,18 @@
-// This is a basic Flutter widget test.
-//
-// To perform an interaction with a widget in your test, use the WidgetTester
-// utility in the flutter_test package. For example, you can send tap and scroll
-// gestures. You can also use WidgetTester to find child widgets in the widget
-// tree, read text, and verify that the values of widget properties are correct.
-
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 
-import 'package:finalproject/main.dart';
+import 'package:finalproject/theme/app_theme.dart';
 
 void main() {
-  testWidgets('Counter increments smoke test', (WidgetTester tester) async {
-    // Build our app and trigger a frame.
-    await tester.pumpWidget(const MyApp());
+  testWidgets('App theme builds', (WidgetTester tester) async {
+    await tester.pumpWidget(
+      MaterialApp(
+        theme: AppTheme.lightTheme(),
+        home: const Scaffold(body: Center(child: Text('ok'))),
+      ),
+    );
 
-    // Verify that our counter starts at 0.
-    expect(find.text('0'), findsOneWidget);
-    expect(find.text('1'), findsNothing);
-
-    // Tap the '+' icon and trigger a frame.
-    await tester.tap(find.byIcon(Icons.add));
-    await tester.pump();
-
-    // Verify that our counter has incremented.
-    expect(find.text('0'), findsNothing);
-    expect(find.text('1'), findsOneWidget);
+    expect(find.text('ok'), findsOneWidget);
+    expect(find.byType(Scaffold), findsOneWidget);
   });
 }