feat: chat table support copy value via right click

Author: ulleo

frontend/src/views/chat/component/charts/Table.ts

@@ -109,10 +109,11 @@ function copyData(event: any, s2?: TableSheet) {
     const cellMeta = s2.facet.getCellMeta(c.rowIndex, c.colIndex)
     console.log(cellMeta)
     if (cellMeta) {
-      let value = cellMeta.fieldValue as string
+      let value = cellMeta.fieldValue
       if (value === null || value === undefined) {
         value = ''
       }
+      value = value + ''
       copyToClipboard(value).finally(() => {
         ElMessage.success(t('qa.copied'))
         console.debug('copied:', cellMeta.fieldValue)