feat: support guest session (#919)

components/chat-header.tsx

@@ -12,17 +12,20 @@ import { useSidebar } from './ui/sidebar';
 import { memo } from 'react';
 import { Tooltip, TooltipContent, TooltipTrigger } from './ui/tooltip';
 import { type VisibilityType, VisibilitySelector } from './visibility-selector';
+import type { Session } from 'next-auth';
 
 function PureChatHeader({
   chatId,
   selectedModelId,
   selectedVisibilityType,
   isReadonly,
+  session,
 }: {
   chatId: string;
   selectedModelId: string;
   selectedVisibilityType: VisibilityType;
   isReadonly: boolean;
+  session: Session;
 }) {
   const router = useRouter();
   const { open } = useSidebar();
@@ -54,6 +57,7 @@ function PureChatHeader({
 
       {!isReadonly && (
         <ModelSelector
+          session={session}
           selectedModelId={selectedModelId}
           className="order-1 md:order-2"
         />