fix bug

Author: maguikai11

src/frontend/platform/src/pages/Dashboard/components/config/DatasetSelector.tsx

@@ -243,7 +243,7 @@ export function DatasetSelector({ selectedDatasetCode, onDatasetChange, onDragSt
                                             key={dimension.field}
                                             className="flex items-center gap-2 p-2 rounded hover:bg-accent/30 cursor-move transition-colors"
                                             draggable
-                                            onDragStart={(e) => handleDragStart(e, dimension, 'dimension')}
+                                            onDragStart={(e) => handleDragStart(e, field, 'dimension')}
                                             onClick={(e) => { e.stopPropagation(); onFieldClick?.(field) }}
                                         >
                                             {getFieldTypeIcon(field.fieldType)}
@@ -284,7 +284,7 @@ export function DatasetSelector({ selectedDatasetCode, onDatasetChange, onDragSt
                                             key={index}
                                             className="flex items-center gap-2 p-2 rounded hover:bg-accent/30 cursor-move transition-colors"
                                             draggable
-                                            onDragStart={(e) => handleDragStart(e, metric, 'metric')}
+                                            onDragStart={(e) => handleDragStart(e, field, 'metric')}
                                             onClick={(e) => {
                                                 e.stopPropagation()
                                                 onFieldClick?.(field)

src/frontend/platform/src/pages/KnowledgePage/components/MetadataDialog.tsx

@@ -169,7 +169,7 @@ export const MetadataRow = React.memo(({
                         {item.type === 'Time' && (
                             <DatePicker
                                 disabled={!isKnowledgeAdmin}
-                                value={item.value ? new Date(item.value) : undefined}
+                                value={item.updated_at ? new Date(item.updated_at) : undefined}
                                 placeholder={t('metadatainfor.selectTime')}
                                 showTime={true}
                                 onChange={(selectedDate: Date | undefined) => {