Browse: no vertical scrollbar on the root shelves

The three shelf rows fit the screen, and each scrolls sideways on its own, so the
page around them no longer scrolls vertically.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

web/src/components/BrowseView.tsx

@@ -192,10 +192,12 @@ function BrowseViewImpl({
           ref={scroller}
           className={ANIMATE_VIEW_TRANSITIONS ? "view-enter" : undefined}
           // Right padding reserves room for the tab rail's own glass bar (see
-          // TAB_RAIL_CLEARANCE) so a full-width shelf row never renders under it.
+          // TAB_RAIL_CLEARANCE) so a full-width shelf row never renders under it. The
+          // three rows fit the screen, so no vertical scrollbar: each row scrolls
+          // sideways on its own.
           style={{
             flex: 1,
-            overflow: "auto",
+            overflow: "hidden",
             minHeight: 0,
             padding: `14px ${TAB_RAIL_CLEARANCE}px 250px 32px`,
           }}