fix(base): stop runaway pagination loop caused by browser scroll anchoring

Browser overflow-anchor silently bumped scrollTop by one page's worth
of pixels every time a new page of rows committed — anchoring on the
AddRowButton that sits below paddingBottom. This kept the near-bottom
threshold satisfied and re-fired onFetchNextPage indefinitely, even
after the user released the scrollbar. Disabling scroll anchoring on
the grid scroll container stops the browser from adjusting scrollTop
in response to content growth.

apps/client/src/features/base/styles/grid.module.css

@@ -1,6 +1,7 @@
 .gridWrapper {
   position: relative;
   overflow: auto;
+  overflow-anchor: none;
   flex: 1;
   min-height: 0;
   padding-left: 6px;