feat: ui improvement

flutter 3.7 compatibility
responsive view
beautiful progress bar
select file in treeview
downlading and downloaded page

ui/flutter/lib/util/responsive_builder.dart

@@ -0,0 +1,50 @@
+import 'package:flutter/material.dart';
+
+class ResponsiveBuilder extends StatelessWidget {
+  const ResponsiveBuilder({
+    required this.narrowBuilder,
+    required this.mediumBuilder,
+    required this.wideBuilder,
+    Key? key,
+  }) : super(key: key);
+
+  final Widget Function(
+    BuildContext context,
+    BoxConstraints constraints,
+  ) narrowBuilder;
+
+  final Widget Function(
+    BuildContext context,
+    BoxConstraints constraints,
+  ) mediumBuilder;
+
+  final Widget Function(
+    BuildContext context,
+    BoxConstraints constraints,
+  ) wideBuilder;
+
+  static bool isNarrow(BuildContext context) =>
+      MediaQuery.of(context).size.width < 768;
+
+  static bool isMedium(BuildContext context) =>
+      MediaQuery.of(context).size.width < 992 &&
+      MediaQuery.of(context).size.width >= 768;
+
+  static bool isWide(BuildContext context) =>
+      MediaQuery.of(context).size.width >= 992;
+
+  @override
+  Widget build(BuildContext context) {
+    return LayoutBuilder(
+      builder: (context, constraints) {
+        if (constraints.maxWidth >= 992) {
+          return wideBuilder(context, constraints);
+        } else if (constraints.maxWidth >= 768) {
+          return mediumBuilder(context, constraints);
+        } else {
+          return narrowBuilder(context, constraints);
+        }
+      },
+    );
+  }
+}