fix: display updated timestamp when available in knowledge base (#7453)

* fix: display updated timestamp when available in knowledge base

- Add updated_at field when creating knowledge items
- Show updated_at timestamp if it's newer than created_at
- Fallback to created_at if updated_at is not available or older

Fixes #4587

Signed-off-by: Ying-xi <62348590+Ying-xi@users.noreply.github.com>

* refactor(knowledge): extract display time logic into a reusable function

Signed-off-by: Ying-xi <62348590+Ying-xi@users.noreply.github.com>

---------

Signed-off-by: Ying-xi <62348590+Ying-xi@users.noreply.github.com>

src/renderer/src/hooks/useKnowledge.ts

@@ -169,7 +169,8 @@ export const useKnowledge = (baseId: string) => {
         processingStatus: 'pending',
         processingProgress: 0,
         processingError: '',
-        uniqueId: undefined
+        uniqueId: undefined,
+        updated_at: Date.now()
       })
       setTimeout(() => KnowledgeQueue.checkAllBases(), 0)
     }

src/renderer/src/pages/knowledge/KnowledgeContent.tsx

@@ -35,6 +35,11 @@ interface KnowledgeContentProps {
 
 const fileTypes = [...bookExts, ...thirdPartyApplicationExts, ...documentExts, ...textExts]
 
+const getDisplayTime = (item: KnowledgeItem) => {
+  const timestamp = item.updated_at && item.updated_at > item.created_at ? item.updated_at : item.created_at
+  return dayjs(timestamp).format('MM-DD HH:mm')
+}
+
 const KnowledgeContent: FC<KnowledgeContentProps> = ({ selectedBase }) => {
   const { t } = useTranslation()
   const [expandAll, setExpandAll] = useState(false)
@@ -335,7 +340,7 @@ const KnowledgeContent: FC<KnowledgeContentProps> = ({ selectedBase }) => {
                             </ClickableSpan>
                           ),
                           ext: file.ext,
-                          extra: `${dayjs(file.created_at).format('MM-DD HH:mm')} · ${formatFileSize(file.size)}`,
+                          extra: `${getDisplayTime(item)} · ${formatFileSize(file.size)}`,
                           actions: (
                             <FlexAlignCenter>
                               {item.uniqueId && (
@@ -392,7 +397,7 @@ const KnowledgeContent: FC<KnowledgeContentProps> = ({ selectedBase }) => {
                     </ClickableSpan>
                   ),
                   ext: '.folder',
-                  extra: `${dayjs(item.created_at).format('MM-DD HH:mm')}`,
+                  extra: getDisplayTime(item),
                   actions: (
                     <FlexAlignCenter>
                       {item.uniqueId && <Button type="text" icon={<RefreshIcon />} onClick={() => refreshItem(item)} />}
@@ -470,7 +475,7 @@ const KnowledgeContent: FC<KnowledgeContentProps> = ({ selectedBase }) => {
                     </Dropdown>
                   ),
                   ext: '.url',
-                  extra: `${dayjs(item.created_at).format('MM-DD HH:mm')}`,
+                  extra: getDisplayTime(item),
                   actions: (
                     <FlexAlignCenter>
                       {item.uniqueId && <Button type="text" icon={<RefreshIcon />} onClick={() => refreshItem(item)} />}
@@ -525,7 +530,7 @@ const KnowledgeContent: FC<KnowledgeContentProps> = ({ selectedBase }) => {
                     </ClickableSpan>
                   ),
                   ext: '.sitemap',
-                  extra: `${dayjs(item.created_at).format('MM-DD HH:mm')}`,
+                  extra: getDisplayTime(item),
                   actions: (
                     <FlexAlignCenter>
                       {item.uniqueId && <Button type="text" icon={<RefreshIcon />} onClick={() => refreshItem(item)} />}
@@ -570,7 +575,7 @@ const KnowledgeContent: FC<KnowledgeContentProps> = ({ selectedBase }) => {
                 fileInfo={{
                   name: <span onClick={() => handleEditNote(note)}>{(note.content as string).slice(0, 50)}...</span>,
                   ext: '.txt',
-                  extra: `${dayjs(note.created_at).format('MM-DD HH:mm')}`,
+                  extra: getDisplayTime(note),
                   actions: (
                     <FlexAlignCenter>
                       <Button type="text" onClick={() => handleEditNote(note)} icon={<EditOutlined />} />