Add OnRowClick EventCallback to QuickGrid (#64606)

* Initial plan

* Fix RowClassApplied test and consolidate RenderRow logic

Co-authored-by: javiercn <6995051+javiercn@users.noreply.github.com>

* Fix trailing space in combinedClass when rowClass is null

Co-authored-by: javiercn <6995051+javiercn@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: javiercn <6995051+javiercn@users.noreply.github.com>

Author: Copilot

src/Components/QuickGrid/Microsoft.AspNetCore.Components.QuickGrid/src/QuickGrid.razor

@@ -66,9 +66,16 @@
     private void RenderRow(RenderTreeBuilder __builder, int rowIndex, TGridItem item)
     {
         var rowClass = RowClass?.Invoke(item);
+        var combinedClass = OnRowClick.HasDelegate
+            ? string.IsNullOrEmpty(rowClass) ? "row-clickable" : $"row-clickable {rowClass}"
+            : rowClass;
+
         if (OnRowClick.HasDelegate)
         {
-            <tr @key="@(ItemKey(item))" aria-rowindex="@rowIndex" class="row-clickable @rowClass" @onclick="@(() => OnRowClick.InvokeAsync(item))">
+            <tr @key="@(ItemKey(item))"
+                aria-rowindex="@rowIndex"
+                class="@combinedClass"
+                @onclick="@(() => OnRowClick.InvokeAsync(item))">
                 @foreach (var col in _columns)
                 {
                     <td class="@ColumnClass(col)" @key="@col">@{ col.CellContent(__builder, item); }</td>
@@ -77,7 +84,9 @@
         }
         else
         {
-            <tr @key="@(ItemKey(item))" aria-rowindex="@rowIndex" class="@rowClass">
+            <tr @key="@(ItemKey(item))"
+                aria-rowindex="@rowIndex"
+                class="@combinedClass">
                 @foreach (var col in _columns)
                 {
                     <td class="@ColumnClass(col)" @key="@col">@{ col.CellContent(__builder, item); }</td>

src/Components/test/E2ETest/Tests/QuickGridTest.cs

@@ -136,11 +136,11 @@ public void RowClassApplied()
             if (firstName == "Julie")
             {
                 isJulieRowFound = true;
-                Assert.Equal("highlight", row.GetDomAttribute("class"));
+                Assert.Equal("row-clickable highlight", row.GetDomAttribute("class"));
             }
             else
             {
-                Assert.Null(row.GetDomAttribute("class"));
+                Assert.Equal("row-clickable", row.GetDomAttribute("class"));
             }
         }