Features: Memory page rendering and other bug fixes (#11784)

### What problem does this PR solve?

Features: Memory page rendering and other bug fixes
- Rendering of the Memory list page
- Rendering of the message list page in Memory
- Fixed an issue where the empty state was incorrectly displayed when
search criteria were applied
- Added a web link for the API-Key
- modifying the index_mode attribute of the Confluence data source.

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)
- [x] New Feature (non-breaking change which adds functionality)

web/src/pages/datasets/index.tsx

@@ -70,18 +70,19 @@ export default function Datasets() {
   return (
     <>
       <section className="py-4 flex-1 flex flex-col">
-        {(!kbs?.length || kbs?.length <= 0) && (
+        {(!kbs?.length || kbs?.length <= 0) && !searchString && (
           <div className="flex w-full items-center justify-center h-[calc(100vh-164px)]">
             <EmptyAppCard
               showIcon
               size="large"
               className="w-[480px] p-14"
+              isSearch={!!searchString}
               type={EmptyCardType.Dataset}
               onClick={() => showModal()}
             />
           </div>
         )}
-        {!!kbs?.length && (
+        {(!!kbs?.length || searchString) && (
           <>
             <ListFilterBar
               title={t('header.dataset')}
@@ -98,6 +99,18 @@ export default function Datasets() {
                 {t('knowledgeList.createKnowledgeBase')}
               </Button>
             </ListFilterBar>
+            {(!kbs?.length || kbs?.length <= 0) && searchString && (
+              <div className="flex w-full items-center justify-center h-[calc(100vh-164px)]">
+                <EmptyAppCard
+                  showIcon
+                  size="large"
+                  className="w-[480px] p-14"
+                  isSearch={!!searchString}
+                  type={EmptyCardType.Dataset}
+                  onClick={() => showModal()}
+                />
+              </div>
+            )}
             <div className="flex-1">
               <CardContainer className="max-h-[calc(100dvh-280px)] overflow-auto px-8">
                 {kbs.map((dataset) => {