fix(pc-client,account-service): B-61 试用前小修 - 头像取首字/群头像拼格/近似灰Token收敛/重置密码踢下线，构建 v1.0.1 安装包

Co-authored-by: multica-agent <github@multica.ai>

pc-client/src/pages/chat/EmptyChat.tsx

@@ -5,7 +5,7 @@ export const EmptyChat = () => {
   const { t } = useTranslation();
 
   return (
-    <Layout className="no-mobile flex items-center justify-center !bg-[#F3F5F7]">
+    <Layout className="no-mobile flex items-center justify-center !bg-[var(--chat-bg)]">
       <div className="flex flex-col items-center">
         <div className="flex h-16 w-16 items-center justify-center rounded-2xl bg-[var(--primary)]">
           <svg width="34" height="34" viewBox="0 0 24 24" fill="none">