The chat dialog box cannot be fully displayed on a small screen #10034 (#10049)

### What problem does this PR solve?

The chat dialog box cannot be fully displayed on a small screen #10034

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

web/src/pages/agent/chat/box.tsx

@@ -62,7 +62,7 @@ function AgentChatBox() {
 
   return (
     <>
-      <section className="flex flex-1 flex-col px-5 h-[90vh]">
+      <section className="flex flex-1 flex-col px-5 min-h-0 pb-4">
         <div className="flex-1 overflow-auto" ref={messageContainerRef}>
           <div>
             {/* <Spin spinning={sendLoading}> */}

web/src/pages/agent/chat/chat-sheet.tsx

@@ -9,7 +9,7 @@ export function ChatSheet({ hideModal }: IModalProps<any>) {
   return (
     <Sheet open modal={false} onOpenChange={hideModal}>
       <SheetContent
-        className={cn('top-20 p-0')}
+        className={cn('top-20 bottom-0 p-0 flex flex-col h-auto')}
         onInteractOutside={(e) => e.preventDefault()}
       >
         <SheetTitle className="hidden"></SheetTitle>