fix(ui): change read-only comment popover border-radius to 8px

packages/ui/src/components/line-comment.css

@@ -36,7 +36,7 @@
   z-index: var(--line-comment-popover-z, 40);
   min-width: 200px;
   max-width: min(320px, calc(100vw - 48px));
-  border-radius: 14px;
+  border-radius: 8px;
   background: var(--surface-raised-stronger-non-alpha);
   box-shadow: var(--shadow-lg-border-base);
   padding: 12px;