feat: 添加分页功能和缓存管理，优化问答记录展示

app/stores/answer.ts

@@ -13,6 +13,9 @@ import { AnswerService } from "@/services";
 /** Dashboard 最近记录表格每页数量，组件直接复用，避免多个地方写死 */
 export const DASHBOARD_RECORD_PAGE_SIZE = 10;
 
+/** 分页大小可选列表，与后端白名单保持一致 */
+export const DASHBOARD_PAGE_SIZE_OPTIONS = [10, 50, 100] as const;
+
 /** 题型下拉选项，value 保持 OCS / 旧 Python 服务使用的英文值 */
 export const QUESTION_TYPE_OPTIONS: Array<{
   label: string;
@@ -104,6 +107,13 @@ export const useAnswerStore = defineStore("answer", () => {
     await getRecords(page);
   };
 
+  /** 切换分页大小，重置到第 1 页后重新请求 */
+  const setRecordsPageSize = async (size: number) => {
+    if (recordsLoading.value || size === recordsPageSize.value) return;
+    recordsPageSize.value = size;
+    await getRecords(1);
+  };
+
   /** 调用答题 API，返回 OCS 兼容结构但只在 store 中维护 UI 状态 */
   const searchAnswer = async () => {
     const title = question.value.trim();
@@ -245,6 +255,7 @@ export const useAnswerStore = defineStore("answer", () => {
     loadDashboard,
     clearCache,
     selectRecord,
-    setRecordsPage
+    setRecordsPage,
+    setRecordsPageSize
   };
 });