fix: Optimize internationalization configuration #3221 (#9924)

### What problem does this PR solve?

fix: Optimize internationalization configuration

- Update multi-language options, adding general translations for
functions like Select All and Clear
- Add internationalization support for modules like Chat, Search, and
Datasets

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

web/src/pages/home/applications.tsx

@@ -26,8 +26,8 @@ export function Applications() {
 
   const options = useMemo(
     () => [
-      { value: Routes.Chats, label: t('header.chat') },
-      { value: Routes.Searches, label: t('header.search') },
+      { value: Routes.Chats, label: t('chat.chatApps') },
+      { value: Routes.Searches, label: t('search.searchApps') },
       { value: Routes.Agents, label: t('header.flow') },
     ],
     [t],

web/src/pages/home/datasets.tsx

@@ -22,7 +22,7 @@ export function Datasets() {
     <section>
       <h2 className="text-2xl font-bold mb-6 flex gap-2.5 items-center">
         <IconFont name="data" className="size-8"></IconFont>
-        {t('header.knowledgeBase')}
+        {t('header.dataset')}
       </h2>
       <div className="flex gap-6">
         {loading ? (