feat: enhance MessageBubble with custom Markdown rendering, update Navbar layout, and integrate Search component in App

src/pages/Chatbox.tsx

@@ -224,7 +224,7 @@ export default function ChatBOX() {
       token: data.usage?.completion_tokens_details
         ? data.usage.completion_tokens -
           data.usage.completion_tokens_details.reasoning_tokens
-        : (data.usage.completion_tokens ?? calculate_token_length(msg.content)),
+        : data.usage.completion_tokens ?? calculate_token_length(msg.content),
       example: false,
       audio: null,
       logprobs: data.choices[0]?.logprobs,
@@ -414,7 +414,6 @@ export default function ChatBOX() {
 
   return (
     <>
-      <APIListMenu />
       <div className="grow flex flex-col p-2 w-full">
         <ChatMessageList>
           {chatStore.history.length === 0 && (