fix: KsDataGrid - improve focusRow edit mode reliability with retry logic

- Use multiple setTimeout attempts to ensure startEditingCell succeeds
- Retry at 10ms and 50ms intervals for DOM/Grid stability
- Addresses issue where keyboard input not available after focusRow

frontend/src/shared/ui/components/KsDataGrid.vue

@@ -158,13 +158,16 @@ function focusRow(rowIndex: number, colKey?: string): void {
   const col = colKey || (props.columns[0]?.field ?? '')
 
   gridApi.value.ensureIndexVisible(rowIndex)
-  gridApi.value.setFocusedCell(rowIndex, col)
 
-  if (col) {
-    setTimeout(() => {
-      gridApi.value?.startEditingCell({ rowIndex, colKey: col })
-    }, 0)
+  const attempt = () => {
+    if (!gridApi.value) return
+    gridApi.value.setFocusedCell(rowIndex, col)
+    gridApi.value.startEditingCell({ rowIndex, colKey: col })
   }
+
+  attempt()
+  setTimeout(attempt, 10)
+  setTimeout(attempt, 50)
 }
 
 function redrawRows(): void {