mod: member archive: show progress

Closes #225

Signed-off-by: bggRGjQaUbCoE <githubaccount56556@proton.me>

lib/common/widgets/video_progress_indicator.dart

@@ -0,0 +1,27 @@
+import 'package:flutter/material.dart';
+
+Widget videoProgressIndicator(double progress) => ClipRect(
+      clipper: ProgressClipper(),
+      child: ClipRRect(
+        borderRadius: BorderRadius.only(
+          bottomLeft: Radius.circular(12),
+          bottomRight: Radius.circular(12),
+        ),
+        child: LinearProgressIndicator(
+          minHeight: 12,
+          value: progress,
+        ),
+      ),
+    );
+
+class ProgressClipper extends CustomClipper<Rect> {
+  @override
+  Rect getClip(Size size) {
+    return Rect.fromLTWH(0, 8, size.width, size.height - 8);
+  }
+
+  @override
+  bool shouldReclip(CustomClipper<Rect> oldClipper) {
+    return false;
+  }
+}