fix: KsDataGrid - ensure edit mode starts after focusing and Enter key navigation

- Add setTimeout in focusRow to ensure DOM updates before startEditingCell
- Add startEditingCell after tabToNextCell in Enter key handler
- Ensures smooth edit mode transition: focus → edit mode immediately

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

@@ -117,6 +117,13 @@ function onCellKeyDown(event: any): void {
     event.event.preventDefault()
     event.api.stopEditing(false)
     event.api.tabToNextCell(false)
+
+    setTimeout(() => {
+      const focusedCell = event.api.getFocusedCell()
+      if (focusedCell && focusedCell.rowIndex !== null) {
+        event.api.startEditingCell({ rowIndex: focusedCell.rowIndex, colKey: focusedCell.column.getColId() })
+      }
+    }, 0)
   }
 }
 
@@ -152,8 +159,11 @@ function focusRow(rowIndex: number, colKey?: string): void {
 
   gridApi.value.ensureIndexVisible(rowIndex)
   gridApi.value.setFocusedCell(rowIndex, col)
+
   if (col) {
-    gridApi.value.startEditingCell({ rowIndex, colKey: col })
+    setTimeout(() => {
+      gridApi.value?.startEditingCell({ rowIndex, colKey: col })
+    }, 0)
   }
 }