style(chat): adjust spacing and margins in chat components

- Reduce gap between elements in BaseChat component from `gap-4` to `gap-2`
- Remove bottom margin from AssistantMessage component for cleaner layout
- Add expo.svg icon to the icons directory for future use

app/components/chat/AssistantMessage.tsx

@@ -104,7 +104,7 @@ export const AssistantMessage = memo(({ content, annotations, messageId, onRewin
               <div className="context"></div>
             </Popover>
           )}
-          <div className="flex w-full items-center justify-between mb-2">
+          <div className="flex w-full items-center justify-between">
             {usage && (
               <div>
                 Tokens: {usage.totalTokens} (prompt: {usage.promptTokens}, completion: {usage.completionTokens})

app/components/chat/BaseChat.tsx

@@ -375,7 +375,7 @@ export const BaseChat = React.forwardRef<HTMLDivElement, BaseChatProps>(
                 />
               )}
               <div
-                className={classNames('flex flex-col gap-4 w-full max-w-chat mx-auto z-prompt mb-6', {
+                className={classNames('flex flex-col gap-2 w-full max-w-chat mx-auto z-prompt mb-6', {
                   'sticky bottom-2': chatStarted,
                 })}
               >

icons/expo.svg

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?><!-- Uploaded to: SVG Repo, www.svgrepo.com, Generator: SVG Repo Mixer Tools -->
+<svg fill="none" width="800px" height="800px" viewBox="0 0 32 32" xmlns="http://www.w3.org/2000/svg">
+  <path fill='#7B7B7B' d="M24.292 15.547c1.968 0.131 3.729-1.213 4.115-3.145-0.475-0.735-1.287-1.177-2.161-1.177-2.272-0.052-3.491 2.651-1.953 4.323zM15.115 4.697l5.359-3.104-1.708-0.963-7.391 4.281 0.589 0.328 1.119 0.629 2.032-1.176zM21.161 1.307c0.089 0.027 0.161 0.1 0.188 0.188l2.484 7.593c0.047 0.131-0.005 0.272-0.125 0.344-1.968 1.156-2.916 3.489-2.317 5.693 0.656 2.391 2.937 3.953 5.401 3.703 0.135-0.011 0.265 0.073 0.307 0.203l2.563 7.803c0.041 0.131-0.011 0.271-0.125 0.344l-7.859 4.771c-0.037 0.021-0.084 0.036-0.131 0.036-0.068 0.016-0.14 0-0.203-0.041l-2.765-1.797c-0.048-0.031-0.084-0.077-0.109-0.129l-5.396-12.896-8.219 4.875c-0.016 0.011-0.037 0.021-0.052 0.032-0.084 0.036-0.183 0.025-0.261-0.021l-1.859-1.093c-0.136-0.073-0.188-0.245-0.115-0.381l7.953-15.749c0.025-0.057 0.077-0.104 0.135-0.131l7.959-4.609c0.088-0.052 0.197-0.057 0.292-0.005zM12.839 6.407l-1.932-1.089-7.693 15.229 1.396 0.823 6.631-9.015c0.063-0.089 0.167-0.136 0.271-0.12 0.104 0.011 0.192 0.077 0.235 0.177l7.228 17.296 1.933 1.251-8.063-24.552zM26.245 16.964c-2.256 0-3.787-2.292-2.923-4.376 0.86-2.083 3.563-2.619 5.156-1.025 0.595 0.593 0.928 1.396 0.928 2.235 0.005 1.749-1.412 3.167-3.161 3.167z"/>
+</svg>