🪶 refactor: Chat Input Focus for Conversation Navigations & ChatForm Optimizations (#7100)

* refactor: improve ChatView layout by keeping ChatForm mounted

* feat: implement focusChat functionality for new conversations and navigations

* refactor: reset artifacts when navigating to prevent any from rendering in a conversation when none exist; edge case, artifacts get created by search route (TODO: use a different artifact renderer for Search markdown)

client/src/components/Chat/ChatView.tsx

@@ -2,6 +2,7 @@ import { memo, useCallback } from 'react';
 import { useRecoilValue } from 'recoil';
 import { useForm } from 'react-hook-form';
 import { useParams } from 'react-router-dom';
+import { Constants } from 'librechat-data-provider';
 import { useGetMessagesByConvoId } from 'librechat-data-provider/react-query';
 import type { TMessage } from 'librechat-data-provider';
 import type { ChatFormValues } from '~/common';
@@ -11,8 +12,8 @@ import ConversationStarters from './Input/ConversationStarters';
 import MessagesView from './Messages/MessagesView';
 import { Spinner } from '~/components/svg';
 import Presentation from './Presentation';
+import { buildTree, cn } from '~/utils';
 import ChatForm from './Input/ChatForm';
-import { buildTree } from '~/utils';
 import Landing from './Landing';
 import Header from './Header';
 import Footer from './Footer';
@@ -48,9 +49,11 @@ function ChatView({ index = 0 }: { index?: number }) {
   });
 
   let content: JSX.Element | null | undefined;
-  const isLandingPage = !messagesTree || messagesTree.length === 0;
+  const isLandingPage =
+    (!messagesTree || messagesTree.length === 0) &&
+    (conversationId === Constants.NEW_CONVO || !conversationId);
 
-  if (isLoading && conversationId !== 'new') {
+  if (isLoading && conversationId !== Constants.NEW_CONVO) {
     content = (
       <div className="relative flex-1 overflow-hidden overflow-y-auto">
         <div className="relative flex h-full items-center justify-center">
@@ -71,27 +74,28 @@ function ChatView({ index = 0 }: { index?: number }) {
           <Presentation>
             <div className="flex h-full w-full flex-col">
               {!isLoading && <Header />}
-
-              {isLandingPage ? (
-                <>
-                  <div className="flex flex-1 flex-col items-center justify-end sm:justify-center">
-                    {content}
-                    <div className="w-full max-w-3xl transition-all duration-200 xl:max-w-4xl">
-                      <ChatForm index={index} />
-                      <ConversationStarters />
-                    </div>
-                  </div>
-                  <Footer />
-                </>
-              ) : (
-                <div className="flex h-full flex-col overflow-y-auto">
+              <>
+                <div
+                  className={cn(
+                    'flex flex-col',
+                    isLandingPage
+                      ? 'flex-1 items-center justify-end sm:justify-center'
+                      : 'h-full overflow-y-auto',
+                  )}
+                >
                   {content}
-                  <div className="w-full">
+                  <div
+                    className={cn(
+                      'w-full',
+                      isLandingPage && 'max-w-3xl transition-all duration-200 xl:max-w-4xl',
+                    )}
+                  >
                     <ChatForm index={index} />
-                    <Footer />
+                    {isLandingPage ? <ConversationStarters /> : <Footer />}
                   </div>
                 </div>
-              )}
+                {isLandingPage && <Footer />}
+              </>
             </div>
           </Presentation>
         </AddedChatContext.Provider>