refactor: unify device analysis and performance testing logic for improved module consistency

siro_driver/lib/controller/functions/performance_test.dart

@@ -1,40 +1,59 @@
 import 'dart:io';
+import 'dart:isolate';
 
 class PerformanceTester {
   /// ✅ فحص سرعة الكتابة إلى التخزين (Storage Write Speed) بوحدة MB/s
-  static Future<double> testStorageWriteSpeed() async {
-    try {
-      final tempDir = Directory.systemTemp;
-      final testFile = File('${tempDir.path}/speed_test.txt');
-      final data = List<int>.filled(1024 * 1024 * 5, 0); // 5MB
+  /// يكرر القياس عدة مرات ويأخذ المتوسط الوسيط لتقليل تأثير الحمل العرضي على الجهاز.
+  static Future<double> testStorageWriteSpeed({int samples = 3}) async {
+    final List<double> speeds = [];
+    for (int i = 0; i < samples; i++) {
+      try {
+        final tempDir = Directory.systemTemp;
+        final testFile = File('${tempDir.path}/speed_test_$i.txt');
+        final data = List<int>.filled(1024 * 1024 * 5, 0); // 5MB
 
-      final stopwatch = Stopwatch()..start();
-      await testFile.writeAsBytes(data, flush: true);
-      stopwatch.stop();
+        final stopwatch = Stopwatch()..start();
+        await testFile.writeAsBytes(data, flush: true);
+        stopwatch.stop();
 
-      await testFile.delete();
+        await testFile.delete();
 
-      double seconds = stopwatch.elapsedMilliseconds / 1000;
-      if (seconds == 0) seconds = 0.001;
+        double seconds = stopwatch.elapsedMilliseconds / 1000;
+        if (seconds == 0) seconds = 0.001;
 
-      final speed = 5 / seconds;
-      return double.parse(speed.toStringAsFixed(2));
-    } catch (e) {
-      print("❌ Storage write error: $e");
-      return 0.0;
+        speeds.add(5 / seconds);
+      } catch (e) {
+        print("❌ Storage write error: $e");
+      }
     }
+    if (speeds.isEmpty) return 0.0;
+    speeds.sort();
+    final median = speeds[speeds.length ~/ 2];
+    return double.parse(median.toStringAsFixed(2));
+  }
+
+  /// عملية حسابية مكثفة تُنفَّذ داخل isolate منفصل حتى لا تجمّد واجهة المستخدم.
+  static double _cpuBurn(int iterations) {
+    double x = 0;
+    for (int i = 0; i < iterations; i++) {
+      x += i * 0.000001;
+    }
+    return x;
   }
 
   /// ✅ فحص سرعة المعالج (CPU Compute Speed) بوحدة الثواني
-  static Future<double> testCPUSpeed() async {
+  /// يعمل في isolate منفصل (لا يجمّد الواجهة) ويكرر القياس ويأخذ الوسيط.
+  static Future<double> testCPUSpeed({int samples = 3}) async {
     try {
-      final stopwatch = Stopwatch()..start();
-      double x = 0;
-      for (int i = 0; i < 100000000; i++) {
-        x += i * 0.000001;
+      final List<double> times = [];
+      for (int i = 0; i < samples; i++) {
+        final stopwatch = Stopwatch()..start();
+        await Isolate.run(() => _cpuBurn(100000000));
+        stopwatch.stop();
+        times.add(stopwatch.elapsedMilliseconds / 1000.0);
       }
-      stopwatch.stop();
-      return stopwatch.elapsedMilliseconds / 1000.0;
+      times.sort();
+      return times[times.length ~/ 2];
     } catch (e) {
       print("❌ CPU compute error: $e");
       return 999.0;