fix(fe): KsDataGrid - add missing redrawRows method

Problem: DataGridShell expects gridRef to have redrawRows() method
but KsDataGrid.vue only exposed focusRow and gridApi

Fixed:
1. Added redrawRows() function that calls gridApi.redrawRows()
2. Updated defineExpose to include redrawRows
3. Removed unused CellEditingStoppedEvent import

Result: CommonCodeManagementPage.redrawRows() calls now work

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

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

@@ -181,8 +181,11 @@ function focusRow(rowIndex: number, colKey?: string): void {
   setTimeout(attempt, 150)
 }
 
+function redrawRows(): void {
+  gridApi.value?.redrawRows()
+}
 
-import type { NavigateToNextCellParams, CellPosition, CellEditingStoppedEvent } from 'ag-grid-community'
+import type { NavigateToNextCellParams, CellPosition } from 'ag-grid-community'
 
 
 
@@ -231,7 +234,7 @@ function navigateToNextCell(params: NavigateToNextCellParams): CellPosition | nu
   return suggestedNextCell
 }
 
-defineExpose({ focusRow, gridApi })
+defineExpose({ focusRow, redrawRows, gridApi })
 </script>
 
 <template>