优化banner逻辑

src/main_pages/index.tsx

@@ -13,6 +13,7 @@ import MessagePageContent from "./components/MessagePageContent";
 import MyselfPageContent from "./components/MyselfPageContent";
 import "./index.scss";
 import FamilyContext from "@/context";
+import { useDictionaryStore } from "@/store/dictionaryStore";
 
 type TabType = "list" | "message" | "personal";
 
@@ -66,6 +67,12 @@ const MainPage: React.FC = () => {
         try {
           await fetchUserInfo();
           await checkNicknameChangeStatus();
+          // 启动时预取 Banner 字典（与业务无强依赖，失败不影响主流程）
+          try {
+            await useDictionaryStore.getState().fetchBannerDictionary();
+          } catch (e) {
+            console.error("预取 Banner 字典失败:", e);
+          }
         } catch (error) {
           console.error("获取用户信息失败:", error);
         }