enhance(ui): forced colors mode enhancements (#38991)

Improve various UI elements while in [forced color
mode](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/At-rules/@media/forced-colors).

web_src/css/base.css

@@ -224,6 +224,16 @@ progress::-moz-progress-bar {
   background-color: var(--color-accent);
 }
 
+@media (forced-colors: active) {
+  progress {
+    outline: 1px solid CanvasText;
+    outline-offset: -1px;
+  }
+  progress::-webkit-progress-value {
+    background: CanvasText;
+  }
+}
+
 * {
   caret-color: var(--color-caret);
 }