⚡ Allow setting image preview quality

lib/providers/config.dart

@@ -0,0 +1,22 @@
+import 'dart:ui';
+
+import 'package:shared_preferences/shared_preferences.dart';
+
+const Map<String, FilterQuality> kImageQualityLevel = {
+  'settingsImageQualityLowest': FilterQuality.none,
+  'settingsImageQualityLow': FilterQuality.low,
+  'settingsImageQualityMedium': FilterQuality.medium,
+  'settingsImageQualityHigh': FilterQuality.high,
+};
+
+class ConfigProvider {
+  late final SharedPreferences prefs;
+
+  Future<void> initialize() async {
+    prefs = await SharedPreferences.getInstance();
+  }
+
+  FilterQuality get imageQuality {
+    return kImageQualityLevel.values.elementAtOrNull(prefs.getInt('app_image_quality') ?? 3) ?? FilterQuality.high;
+  }
+}