fix(frontend): minor copilot UI fixes

autogpt_platform/frontend/src/app/(platform)/copilot/CopilotPage.tsx

@@ -1,11 +1,11 @@
 "use client";
 
-import { LoadingSpinner } from "@/components/atoms/LoadingSpinner/LoadingSpinner";
 import { SidebarProvider } from "@/components/ui/sidebar";
 import { ChatContainer } from "./components/ChatContainer/ChatContainer";
 import { ChatSidebar } from "./components/ChatSidebar/ChatSidebar";
 import { MobileDrawer } from "./components/MobileDrawer/MobileDrawer";
 import { MobileHeader } from "./components/MobileHeader/MobileHeader";
+import { ScaleLoader } from "./components/ScaleLoader/ScaleLoader";
 import { useCopilotPage } from "./useCopilotPage";
 
 export function CopilotPage() {
@@ -34,7 +34,11 @@ export function CopilotPage() {
   } = useCopilotPage();
 
   if (isUserLoading || !isLoggedIn) {
-    return <LoadingSpinner size="large" cover />;
+    return (
+      <div className="fixed inset-0 z-50 flex items-center justify-center bg-[#f8f8f9]">
+        <ScaleLoader className="text-neutral-400" />
+      </div>
+    );
   }
 
   return (

autogpt_platform/frontend/src/app/(platform)/copilot/components/ChatMessagesContainer/ChatMessagesContainer.tsx

@@ -143,10 +143,10 @@ export const ChatMessagesContainer = ({
 
   return (
     <Conversation className="min-h-0 flex-1">
-      <ConversationContent className="gap-6 px-3 py-6">
+      <ConversationContent className="flex min-h-screen flex-1 flex-col gap-6 px-3 py-6">
         {isLoading && messages.length === 0 && (
-          <div className="flex flex-1 items-center justify-center">
-            <LoadingSpinner size="large" className="text-neutral-400" />
+          <div className="flex min-h-full flex-1 items-center justify-center">
+            <LoadingSpinner className="text-neutral-600" />
           </div>
         )}
         {messages.map((message, messageIndex) => {

autogpt_platform/frontend/src/app/(platform)/copilot/components/ChatSidebar/ChatSidebar.tsx

@@ -121,8 +121,8 @@ export function ChatSidebar() {
             className="mt-4 flex flex-col gap-1"
           >
             {isLoadingSessions ? (
-              <div className="flex items-center justify-center py-4">
-                <LoadingSpinner size="small" className="text-neutral-400" />
+              <div className="flex min-h-[30rem] items-center justify-center py-4">
+                <LoadingSpinner size="small" className="text-neutral-600" />
               </div>
             ) : sessions.length === 0 ? (
               <p className="py-4 text-center text-sm text-neutral-500">

autogpt_platform/frontend/src/app/(platform)/copilot/components/ScaleLoader/ScaleLoader.module.css

@@ -0,0 +1,35 @@
+.loader {
+  width: 48px;
+  height: 48px;
+  display: inline-block;
+  position: relative;
+}
+
+.loader::after,
+.loader::before {
+  content: "";
+  box-sizing: border-box;
+  width: 100%;
+  height: 100%;
+  border-radius: 50%;
+  background: currentColor;
+  position: absolute;
+  left: 0;
+  top: 0;
+  animation: animloader 2s linear infinite;
+}
+
+.loader::after {
+  animation-delay: 1s;
+}
+
+@keyframes animloader {
+  0% {
+    transform: scale(0);
+    opacity: 1;
+  }
+  100% {
+    transform: scale(1);
+    opacity: 0;
+  }
+}

autogpt_platform/frontend/src/app/(platform)/copilot/components/ScaleLoader/ScaleLoader.tsx

@@ -0,0 +1,16 @@
+import { cn } from "@/lib/utils";
+import styles from "./ScaleLoader.module.css";
+
+interface Props {
+  size?: number;
+  className?: string;
+}
+
+export function ScaleLoader({ size = 48, className }: Props) {
+  return (
+    <div
+      className={cn(styles.loader, className)}
+      style={{ width: size, height: size }}
+    />
+  );
+}

autogpt_platform/frontend/src/app/(platform)/copilot/tools/CreateAgent/CreateAgent.tsx

@@ -155,7 +155,7 @@ export function CreateAgentTool({ part }: Props) {
         >
           {isOperating && (
             <ContentGrid>
-              <ProgressBar value={progress} className="max-w-[280px]" />
+              <ProgressBar value={progress} />
               <ContentHint>
                 This could take a few minutes, grab a coffee ☕
               </ContentHint>