refactor(centralui): AuditResultsGrid adopts KeysetPager + AuditFilterBar adopts DateTimeRangeFilter (T35g)

src/ZB.MOM.WW.ScadaBridge.CentralUI/Components/Audit/AuditResultsGrid.razor

@@ -72,24 +72,20 @@
         </table>
     </div>
 
-    <div class="d-flex justify-content-between align-items-center">
-        <span class="text-muted small">Page @_pageNumber · @_rows.Count rows</span>
-        @* CentralUI-032: keyset paging is naturally forward-only, but the
-           in-component _cursorStack lets the user step back through previous
-           pages by replaying the prior cursor. The Previous button is gated
-           on the stack having at least one prior cursor — i.e. we are not on
-           the first page. *@
-        <div class="btn-group">
-            <button class="btn btn-outline-secondary btn-sm"
-                    data-test="grid-prev-page"
-                    disabled="@(_loading || !CanGoBack)"
-                    @onclick="PrevPage">Previous page</button>
-            <button class="btn btn-outline-secondary btn-sm"
-                    data-test="grid-next-page"
-                    disabled="@(_loading || _rows.Count < _pageSize)"
-                    @onclick="NextPage">Next page</button>
-        </div>
-    </div>
+    @* CentralUI-032: keyset paging is naturally forward-only, but the
+       in-component _cursorStack lets the user step back through previous
+       pages by replaying the prior cursor. The Previous button is gated
+       on CanGoBack (the stack having at least one prior cursor — i.e. we
+       are not on the first page); HasNextPage mirrors the prior "short
+       page = end" signal (a full page suggests more rows may follow). All
+       cursor logic stays page-side; KeysetPager is purely presentational. *@
+    <KeysetPager PageNumber="_pageNumber"
+                 RowCount="_rows.Count"
+                 CanGoBack="CanGoBack"
+                 HasNextPage="@(!_loading && _rows.Count >= _pageSize)"
+                 Disabled="_loading"
+                 OnPrevious="PrevPage"
+                 OnNext="NextPage" />
 </div>
 
 @code {