diff --git a/src/components/StartTask.vue b/src/components/StartTask.vue
index e4ec0e7..f42a092 100644
--- a/src/components/StartTask.vue
+++ b/src/components/StartTask.vue
@@ -15,10 +15,12 @@ import {
 } from "@/api/studySessions";
 import { useStudyFragment } from "@/components/composables/fragment";
 import { getFragmentsBySession, updateFragments } from "@/api/reportFragments";
-import { getExpectation, getReportDraft, getTaskFragments, getTaskReports, upsertExpectation } from "@/api/studySessions";
 import router from "@/router";
 import MarkdownRenderer from "@/components/MarkdownRenderer.vue";
 import { renderMarkdown } from "@/utils/markdown";
+import { useSessionHistory } from "@/components/composables/useSessionHistory";
+import { useSummaryReport } from "@/components/composables/useSummaryReport";
+import { useSessionExpectation } from "@/components/composables/useSessionExpectation";
 
 const {
   fragmentsDialogVisible,
@@ -41,18 +43,29 @@ const canAbortSession = computed(
   () => taskInfo.value.sessionState !== "ENDED" && fragmentsList.value.length === 0,
 );
 
-const summaryDialogVisible = ref(false);
-const summaryContent = ref("");
-const summaryPreview = ref(false);
-const summaryLoading = ref(false);
-const summaryLoadingSeconds = ref(0);
-let summaryLoadingTimer: ReturnType<typeof setInterval> | null = null;
+// 结束会话总结弹窗（有残片时先取 AI 草稿，等待期间展示已等待秒数）
+const {
+  summaryDialogVisible,
+  summaryContent,
+  summaryPreview,
+  summaryLoading,
+  summaryLoadingSeconds,
+  openSummaryDialog,
+  closeSummaryDialog,
+} = useSummaryReport({
+  getSessionNum: () => taskInfo.value.sessionNum,
+  hasFragments: () => fragmentsList.value.length > 0,
+});
 
-// 学习预期
-const expectationDialogVisible = ref(false);
-const expectationContent = ref("");
-const expectationSaved = ref("");
-const savingExpectation = ref(false);
+// 学习预期：会话必须有预期才能开始计时
+const {
+  expectationDialogVisible,
+  expectationContent,
+  expectationSaved,
+  savingExpectation,
+  loadExpectation,
+  saveExpectation,
+} = useSessionExpectation(() => taskInfo.value.sessionNum);
 
 // 当前会话碎片列表
 interface FragmentItem {
@@ -64,88 +77,27 @@ const editingFragmentId = ref<number | null>(null);
 const editFragmentContent = ref("");
 const savingFragment = ref(false);
 
-// 历史学习记录
-const showHistory = ref(false);
-const historyTab = ref("fragments");
-const historyKeyword = ref("");
-let historyDebounce: ReturnType<typeof setTimeout> | null = null;
-const loadingHistory = ref(false);
-const historyFragments = ref<any[]>([]);
-const fragmentsTotal = ref(0);
-const fragmentsPage = ref(1);
-const historyReports = ref<any[]>([]);
-const reportsTotal = ref(0);
-const reportsPage = ref(1);
-const PAGE_SIZE = 10;
-
-watch(showHistory, (val) => {
-  if (val) {
-    // 展开时立即加载当前 tab 的数据
-    if (historyTab.value === "fragments") loadHistoryFragments();
-    else loadHistoryReports();
-  }
-});
-
-const loadHistoryFragments = async () => {
-  loadingHistory.value = true;
-  try {
-    const res = await getTaskFragments(taskNum, fragmentsPage.value, PAGE_SIZE, historyKeyword.value || undefined);
-    const data = res?.data;
-    historyFragments.value = data?.records || [];
-    fragmentsTotal.value = data?.total || 0;
-  } catch {
-    historyFragments.value = [];
-    fragmentsTotal.value = 0;
-  } finally {
-    loadingHistory.value = false;
-  }
-};
-
-const loadHistoryReports = async () => {
-  loadingHistory.value = true;
-  try {
-    const res = await getTaskReports(taskNum, reportsPage.value, PAGE_SIZE, historyKeyword.value || undefined);
-    const data = res?.data;
-    historyReports.value = data?.records || [];
-    reportsTotal.value = data?.total || 0;
-  } catch {
-    historyReports.value = [];
-    reportsTotal.value = 0;
-  } finally {
-    loadingHistory.value = false;
-  }
-};
-
-const searchHistory = () => {
-  if (historyDebounce) clearTimeout(historyDebounce);
-  historyDebounce = setTimeout(() => {
-    fragmentsPage.value = 1;
-    reportsPage.value = 1;
-    if (historyTab.value === "fragments") loadHistoryFragments();
-    else loadHistoryReports();
-  }, 300);
-};
-
-const onHistoryTabChange = () => {
-  fragmentsPage.value = 1;
-  reportsPage.value = 1;
-  if (historyTab.value === "fragments") loadHistoryFragments();
-  else loadHistoryReports();
-};
-
-const onFragmentsPageChange = (p: number) => {
-  fragmentsPage.value = p;
-  loadHistoryFragments();
-};
-
-const onReportsPageChange = (p: number) => {
-  reportsPage.value = p;
-  loadHistoryReports();
-};
-
 const route = useRoute();
 const taskNum = route.params.taskNum as string;
 
+// 历史学习记录面板（分页查询、搜索防抖、tab 切换）
+const {
+  showHistory,
+  historyTab,
+  historyKeyword,
+  loadingHistory,
+  historyFragments,
+  fragmentsTotal,
+  fragmentsPage,
+  historyReports,
+  reportsTotal,
+  reportsPage,
+  searchHistory,
+  onHistoryTabChange,
+  onFragmentsPageChange,
+  onReportsPageChange,
+} = useSessionHistory(taskNum);
+
 const taskInfo = ref({
   sessionNum: "",
   sessionState: "--",
@@ -416,31 +368,6 @@ const endTimer = async (content: string) => {
   }
 };
 
-const openSummaryDialog = async () => {
-  summaryDialogVisible.value = true;
-  // 有残片且未填写过总结时，用 AI 聚合草稿作为编辑起点
-  if (!summaryContent.value.trim() && fragmentsList.value.length > 0) {
-    summaryLoading.value = true;
-    summaryLoadingSeconds.value = 0;
-    summaryLoadingTimer = setInterval(() => { summaryLoadingSeconds.value++; }, 1000);
-    try {
-      const res = await getReportDraft(taskInfo.value.sessionNum);
-      if (res?.code === 200 && res.data) {
-        summaryContent.value = res.data;
-      }
-    } catch {
-      // 草稿失败不阻塞手写
-    } finally {
-      summaryLoading.value = false;
-      if (summaryLoadingTimer) { clearInterval(summaryLoadingTimer); summaryLoadingTimer = null; }
-    }
-  }
-};
-
-const closeSummaryDialog = () => {
-  summaryDialogVisible.value = false;
-  if (summaryLoadingTimer) { clearInterval(summaryLoadingTimer); summaryLoadingTimer = null; }
-};
 const openAbortDialog = () => {
   abortConfirmation.value = "";
   abortDialogVisible.value = true;
@@ -570,41 +497,6 @@ const loadTaskSession = async () => {
   }
 };
 
-// 学习预期：会话必须有预期才能开始计时
-const loadExpectation = async () => {
-  if (!taskInfo.value.sessionNum) return;
-  try {
-    const res = await getExpectation(taskInfo.value.sessionNum);
-    expectationSaved.value = res?.data?.description || "";
-  } catch {
-    expectationSaved.value = "";
-  }
-  if (!expectationSaved.value) {
-    expectationDialogVisible.value = true;
-  }
-};
-
-const saveExpectation = async () => {
-  if (!expectationContent.value.trim()) {
-    ElMessage.warning("学习预期不可为空");
-    return;
-  }
-  savingExpectation.value = true;
-  try {
-    const res = await upsertExpectation(taskInfo.value.sessionNum, expectationContent.value);
-    if (res?.code === 200) {
-      expectationSaved.value = expectationContent.value;
-      expectationDialogVisible.value = false;
-    } else {
-      ElMessage.error(res?.message || "保存失败");
-    }
-  } catch (e: any) {
-    ElMessage.error(e.message || "请求失败");
-  } finally {
-    savingExpectation.value = false;
-  }
-};
-
 const initPage = async () => {
   try {
     const hasPermission = await checkAudioPermission();
diff --git a/src/components/composables/useSessionExpectation.ts b/src/components/composables/useSessionExpectation.ts
new file mode 100644
index 0000000..06cbd74
--- /dev/null
+++ b/src/components/composables/useSessionExpectation.ts
@@ -0,0 +1,58 @@
+import { ref } from 'vue';
+import { ElMessage } from 'element-plus';
+import { getExpectation, upsertExpectation } from '@/api/studySessions';
+
+/**
+ * 学习会话的学习预期：会话必须有预期才能开始计时。
+ * - loadExpectation：读取已保存预期，无预期时自动弹出填写弹窗
+ * - saveExpectation：保存预期并关闭弹窗
+ */
+export function useSessionExpectation(getSessionNum: () => string) {
+    const expectationDialogVisible = ref(false);
+    const expectationContent = ref("");
+    const expectationSaved = ref("");
+    const savingExpectation = ref(false);
+
+    const loadExpectation = async () => {
+        if (!getSessionNum()) return;
+        try {
+            const res = await getExpectation(getSessionNum());
+            expectationSaved.value = res?.data?.description || "";
+        } catch {
+            expectationSaved.value = "";
+        }
+        if (!expectationSaved.value) {
+            expectationDialogVisible.value = true;
+        }
+    };
+
+    const saveExpectation = async () => {
+        if (!expectationContent.value.trim()) {
+            ElMessage.warning("学习预期不可为空");
+            return;
+        }
+        savingExpectation.value = true;
+        try {
+            const res = await upsertExpectation(getSessionNum(), expectationContent.value);
+            if (res?.code === 200) {
+                expectationSaved.value = expectationContent.value;
+                expectationDialogVisible.value = false;
+            } else {
+                ElMessage.error(res?.message || "保存失败");
+            }
+        } catch (e: any) {
+            ElMessage.error(e.message || "请求失败");
+        } finally {
+            savingExpectation.value = false;
+        }
+    };
+
+    return {
+        expectationDialogVisible,
+        expectationContent,
+        expectationSaved,
+        savingExpectation,
+        loadExpectation,
+        saveExpectation,
+    };
+}
diff --git a/src/components/composables/useSessionHistory.ts b/src/components/composables/useSessionHistory.ts
new file mode 100644
index 0000000..81fe8db
--- /dev/null
+++ b/src/components/composables/useSessionHistory.ts
@@ -0,0 +1,113 @@
+import { ref, watch } from 'vue';
+import { getTaskFragments, getTaskReports } from '@/api/studySessions';
+
+/** 历史残片 / 历史报告共用的列表项形状（模板只消费这些字段） */
+export interface SessionHistoryRecord {
+    id: number;
+    sessionNum: string;
+    content: string;
+    sessionExpectation?: string;
+}
+
+/**
+ * 学习会话页的“历史学习记录”面板：按任务分页查询历史残片与报告，
+ * 支持关键字搜索（300ms 防抖）与 tab 切换。
+ */
+export function useSessionHistory(taskNum: string) {
+    const PAGE_SIZE = 10;
+
+    const showHistory = ref(false);
+    const historyTab = ref("fragments");
+    const historyKeyword = ref("");
+    let historyDebounce: ReturnType<typeof setTimeout> | null = null;
+    const loadingHistory = ref(false);
+    const historyFragments = ref<SessionHistoryRecord[]>([]);
+    const fragmentsTotal = ref(0);
+    const fragmentsPage = ref(1);
+    const historyReports = ref<SessionHistoryRecord[]>([]);
+    const reportsTotal = ref(0);
+    const reportsPage = ref(1);
+
+    watch(showHistory, (val) => {
+        if (val) {
+            // 展开时立即加载当前 tab 的数据
+            if (historyTab.value === "fragments") loadHistoryFragments();
+            else loadHistoryReports();
+        }
+    });
+
+    const loadHistoryFragments = async () => {
+        loadingHistory.value = true;
+        try {
+            const res = await getTaskFragments(taskNum, fragmentsPage.value, PAGE_SIZE, historyKeyword.value || undefined);
+            const data = res?.data;
+            historyFragments.value = data?.records || [];
+            fragmentsTotal.value = data?.total || 0;
+        } catch {
+            historyFragments.value = [];
+            fragmentsTotal.value = 0;
+        } finally {
+            loadingHistory.value = false;
+        }
+    };
+
+    const loadHistoryReports = async () => {
+        loadingHistory.value = true;
+        try {
+            const res = await getTaskReports(taskNum, reportsPage.value, PAGE_SIZE, historyKeyword.value || undefined);
+            const data = res?.data;
+            historyReports.value = data?.records || [];
+            reportsTotal.value = data?.total || 0;
+        } catch {
+            historyReports.value = [];
+            reportsTotal.value = 0;
+        } finally {
+            loadingHistory.value = false;
+        }
+    };
+
+    const searchHistory = () => {
+        if (historyDebounce) clearTimeout(historyDebounce);
+        historyDebounce = setTimeout(() => {
+            fragmentsPage.value = 1;
+            reportsPage.value = 1;
+            if (historyTab.value === "fragments") loadHistoryFragments();
+            else loadHistoryReports();
+        }, 300);
+    };
+
+    const onHistoryTabChange = () => {
+        fragmentsPage.value = 1;
+        reportsPage.value = 1;
+        if (historyTab.value === "fragments") loadHistoryFragments();
+        else loadHistoryReports();
+    };
+
+    const onFragmentsPageChange = (p: number) => {
+        fragmentsPage.value = p;
+        loadHistoryFragments();
+    };
+
+    const onReportsPageChange = (p: number) => {
+        reportsPage.value = p;
+        loadHistoryReports();
+    };
+
+    return {
+        PAGE_SIZE,
+        showHistory,
+        historyTab,
+        historyKeyword,
+        loadingHistory,
+        historyFragments,
+        fragmentsTotal,
+        fragmentsPage,
+        historyReports,
+        reportsTotal,
+        reportsPage,
+        searchHistory,
+        onHistoryTabChange,
+        onFragmentsPageChange,
+        onReportsPageChange,
+    };
+}
diff --git a/src/components/composables/useSummaryReport.ts b/src/components/composables/useSummaryReport.ts
new file mode 100644
index 0000000..3d29c93
--- /dev/null
+++ b/src/components/composables/useSummaryReport.ts
@@ -0,0 +1,54 @@
+import { ref } from 'vue';
+import { getReportDraft } from '@/api/studySessions';
+import { useElapsedSeconds } from './useElapsedSeconds';
+
+/**
+ * “结束会话总结”弹窗：编辑/预览总结内容。
+ * 有学习残片且尚未填写内容时，先取 AI 聚合草稿作为编辑起点（失败不阻塞手写），
+ * 等待期间展示“已等待 N 秒”提示。
+ */
+export function useSummaryReport(options: {
+    getSessionNum: () => string;
+    hasFragments: () => boolean;
+}) {
+    const summaryDialogVisible = ref(false);
+    const summaryContent = ref("");
+    const summaryPreview = ref(false);
+    const summaryLoading = ref(false);
+    const { seconds: summaryLoadingSeconds, start: startLoadingTimer, stop: stopLoadingTimer } = useElapsedSeconds();
+
+    const openSummaryDialog = async () => {
+        summaryDialogVisible.value = true;
+        // 有残片且未填写过总结时，用 AI 聚合草稿作为编辑起点
+        if (!summaryContent.value.trim() && options.hasFragments()) {
+            summaryLoading.value = true;
+            startLoadingTimer();
+            try {
+                const res = await getReportDraft(options.getSessionNum());
+                if (res?.code === 200 && res.data) {
+                    summaryContent.value = res.data;
+                }
+            } catch {
+                // 草稿失败不阻塞手写
+            } finally {
+                summaryLoading.value = false;
+                stopLoadingTimer();
+            }
+        }
+    };
+
+    const closeSummaryDialog = () => {
+        summaryDialogVisible.value = false;
+        stopLoadingTimer();
+    };
+
+    return {
+        summaryDialogVisible,
+        summaryContent,
+        summaryPreview,
+        summaryLoading,
+        summaryLoadingSeconds,
+        openSummaryDialog,
+        closeSummaryDialog,
+    };
+}