diff --git a/src/mcp_feedback_enhanced/web/locales/en/translation.json b/src/mcp_feedback_enhanced/web/locales/en/translation.json
index 0ccc010..b3d4f88 100644
--- a/src/mcp_feedback_enhanced/web/locales/en/translation.json
+++ b/src/mcp_feedback_enhanced/web/locales/en/translation.json
@@ -224,6 +224,28 @@
             "unknown": "Unknown"
         }
     },
+    "sessionHistory": {
+        "management": {
+            "title": "Session History Management",
+            "retentionPeriod": "Retention Period",
+            "retentionHours": "hours",
+            "export": "Export",
+            "clear": "Clear",
+            "exportAll": "Export All",
+            "exportSingle": "Export This Session",
+            "confirmClear": "Are you sure you want to clear all session history?",
+            "exportSuccess": "Session history exported successfully",
+            "clearSuccess": "Session history cleared successfully",
+            "description": "Manage locally stored session history records, including retention period settings and data export functionality"
+        },
+        "retention": {
+            "24hours": "24 hours",
+            "72hours": "72 hours",
+            "168hours": "7 days",
+            "720hours": "30 days",
+            "custom": "Custom"
+        }
+    },
     "connectionMonitor": {
         "connecting": "Connecting...",
         "connected": "Connected",
diff --git a/src/mcp_feedback_enhanced/web/locales/zh-CN/translation.json b/src/mcp_feedback_enhanced/web/locales/zh-CN/translation.json
index 5f8a3ea..0724442 100644
--- a/src/mcp_feedback_enhanced/web/locales/zh-CN/translation.json
+++ b/src/mcp_feedback_enhanced/web/locales/zh-CN/translation.json
@@ -224,6 +224,28 @@
             "unknown": "未知"
         }
     },
+    "sessionHistory": {
+        "management": {
+            "title": "会话历史管理",
+            "retentionPeriod": "保存期限",
+            "retentionHours": "小时",
+            "export": "导出",
+            "clear": "清空",
+            "exportAll": "导出全部",
+            "exportSingle": "导出此会话",
+            "confirmClear": "确定要清空所有会话历史吗？",
+            "exportSuccess": "会话历史已导出",
+            "clearSuccess": "会话历史已清空",
+            "description": "管理本地存储的会话历史记录，包括保存期限设定和数据导出功能"
+        },
+        "retention": {
+            "24hours": "24 小时",
+            "72hours": "72 小时",
+            "168hours": "7 天",
+            "720hours": "30 天",
+            "custom": "自定义"
+        }
+    },
     "connectionMonitor": {
         "connecting": "连接中...",
         "connected": "已连接",
diff --git a/src/mcp_feedback_enhanced/web/locales/zh-TW/translation.json b/src/mcp_feedback_enhanced/web/locales/zh-TW/translation.json
index 64d8995..559800a 100644
--- a/src/mcp_feedback_enhanced/web/locales/zh-TW/translation.json
+++ b/src/mcp_feedback_enhanced/web/locales/zh-TW/translation.json
@@ -229,6 +229,28 @@
         },
         "noSummary": "無摘要"
     },
+    "sessionHistory": {
+        "management": {
+            "title": "會話歷史管理",
+            "retentionPeriod": "保存期限",
+            "retentionHours": "小時",
+            "export": "匯出",
+            "clear": "清空",
+            "exportAll": "匯出全部",
+            "exportSingle": "匯出此會話",
+            "confirmClear": "確定要清空所有會話歷史嗎？",
+            "exportSuccess": "會話歷史已匯出",
+            "clearSuccess": "會話歷史已清空",
+            "description": "管理本地儲存的會話歷史記錄，包括保存期限設定和資料匯出功能"
+        },
+        "retention": {
+            "24hours": "24 小時",
+            "72hours": "72 小時",
+            "168hours": "7 天",
+            "720hours": "30 天",
+            "custom": "自訂"
+        }
+    },
     "connectionMonitor": {
         "connecting": "連接中...",
         "connected": "已連接",
diff --git a/src/mcp_feedback_enhanced/web/static/css/session-management.css b/src/mcp_feedback_enhanced/web/static/css/session-management.css
index 5af885a..ee81708 100644
--- a/src/mcp_feedback_enhanced/web/static/css/session-management.css
+++ b/src/mcp_feedback_enhanced/web/static/css/session-management.css
@@ -539,6 +539,40 @@
   border-color: var(--accent-color);
 }
 
+/* 匯出按鈕樣式 */
+.btn-export {
+  background: var(--bg-primary) !important;
+  border-color: var(--success-color) !important;
+  color: var(--success-color) !important;
+}
+
+.btn-export:hover {
+  background: var(--success-color) !important;
+  color: white !important;
+  border-color: var(--success-color) !important;
+}
+
+/* 會話歷史管理按鈕樣式 */
+#exportSessionHistoryBtn {
+  background: var(--success-color);
+  border-color: var(--success-color);
+  color: white;
+}
+
+#exportSessionHistoryBtn:hover {
+  background: var(--success-color-dark, #28a745);
+  border-color: var(--success-color-dark, #28a745);
+}
+
+#clearSessionHistoryBtn {
+  background: var(--bg-primary);
+}
+
+#clearSessionHistoryBtn:hover {
+  background: var(--error-color);
+  color: white;
+}
+
 /* ===== 會話統計 ===== */
 .session-stats-section {
   margin-top: 16px;
diff --git a/src/mcp_feedback_enhanced/web/static/js/modules/session-manager.js b/src/mcp_feedback_enhanced/web/static/js/modules/session-manager.js
index 76b3219..c4befb7 100644
--- a/src/mcp_feedback_enhanced/web/static/js/modules/session-manager.js
+++ b/src/mcp_feedback_enhanced/web/static/js/modules/session-manager.js
@@ -73,6 +73,7 @@
 
         // 最後初始化數據管理器（確保 UI 組件已準備好接收回調）
         this.dataManager = new window.MCPFeedback.Session.DataManager({
+            settingsManager: this.settingsManager,
             onSessionChange: function(sessionData) {
                 self.handleSessionChange(sessionData);
             },
@@ -569,6 +570,97 @@
         this.uiRenderer.renderStats(stats);
     };
 
+    /**
+     * 匯出會話歷史
+     */
+    SessionManager.prototype.exportSessionHistory = function() {
+        if (!this.dataManager) {
+            console.error('📋 DataManager 未初始化');
+            return;
+        }
+
+        try {
+            const filename = this.dataManager.exportSessionHistory();
+
+            // 顯示成功訊息
+            if (window.MCPFeedback && window.MCPFeedback.Utils && window.MCPFeedback.Utils.showMessage) {
+                const message = window.i18nManager ?
+                    window.i18nManager.t('sessionHistory.management.exportSuccess') :
+                    '會話歷史已匯出';
+                window.MCPFeedback.Utils.showMessage(message + ': ' + filename, 'success');
+            }
+        } catch (error) {
+            console.error('📋 匯出會話歷史失敗:', error);
+            if (window.MCPFeedback && window.MCPFeedback.Utils && window.MCPFeedback.Utils.showMessage) {
+                window.MCPFeedback.Utils.showMessage('匯出失敗: ' + error.message, 'error');
+            }
+        }
+    };
+
+    /**
+     * 匯出單一會話
+     */
+    SessionManager.prototype.exportSingleSession = function(sessionId) {
+        if (!this.dataManager) {
+            console.error('📋 DataManager 未初始化');
+            return;
+        }
+
+        try {
+            const filename = this.dataManager.exportSingleSession(sessionId);
+            if (filename) {
+                // 顯示成功訊息
+                if (window.MCPFeedback && window.MCPFeedback.Utils && window.MCPFeedback.Utils.showMessage) {
+                    const message = window.i18nManager ?
+                        window.i18nManager.t('sessionHistory.management.exportSuccess') :
+                        '會話已匯出';
+                    window.MCPFeedback.Utils.showMessage(message + ': ' + filename, 'success');
+                }
+            }
+        } catch (error) {
+            console.error('📋 匯出單一會話失敗:', error);
+            if (window.MCPFeedback && window.MCPFeedback.Utils && window.MCPFeedback.Utils.showMessage) {
+                window.MCPFeedback.Utils.showMessage('匯出失敗: ' + error.message, 'error');
+            }
+        }
+    };
+
+    /**
+     * 清空會話歷史
+     */
+    SessionManager.prototype.clearSessionHistory = function() {
+        if (!this.dataManager) {
+            console.error('📋 DataManager 未初始化');
+            return;
+        }
+
+        // 確認對話框
+        const confirmMessage = window.i18nManager ?
+            window.i18nManager.t('sessionHistory.management.confirmClear') :
+            '確定要清空所有會話歷史嗎？';
+
+        if (!confirm(confirmMessage)) {
+            return;
+        }
+
+        try {
+            this.dataManager.clearHistory();
+
+            // 顯示成功訊息
+            if (window.MCPFeedback && window.MCPFeedback.Utils && window.MCPFeedback.Utils.showMessage) {
+                const message = window.i18nManager ?
+                    window.i18nManager.t('sessionHistory.management.clearSuccess') :
+                    '會話歷史已清空';
+                window.MCPFeedback.Utils.showMessage(message, 'success');
+            }
+        } catch (error) {
+            console.error('📋 清空會話歷史失敗:', error);
+            if (window.MCPFeedback && window.MCPFeedback.Utils && window.MCPFeedback.Utils.showMessage) {
+                window.MCPFeedback.Utils.showMessage('清空失敗: ' + error.message, 'error');
+            }
+        }
+    };
+
     /**
      * 清理資源
      */
@@ -618,6 +710,33 @@
         }
     };
 
+    // 全域匯出會話歷史方法
+    window.MCPFeedback.SessionManager.exportSessionHistory = function() {
+        if (window.MCPFeedback && window.MCPFeedback.app && window.MCPFeedback.app.sessionManager) {
+            window.MCPFeedback.app.sessionManager.exportSessionHistory();
+        } else {
+            console.warn('找不到 SessionManager 實例');
+        }
+    };
+
+    // 全域匯出單一會話方法
+    window.MCPFeedback.SessionManager.exportSingleSession = function(sessionId) {
+        if (window.MCPFeedback && window.MCPFeedback.app && window.MCPFeedback.app.sessionManager) {
+            window.MCPFeedback.app.sessionManager.exportSingleSession(sessionId);
+        } else {
+            console.warn('找不到 SessionManager 實例');
+        }
+    };
+
+    // 全域清空會話歷史方法
+    window.MCPFeedback.SessionManager.clearSessionHistory = function() {
+        if (window.MCPFeedback && window.MCPFeedback.app && window.MCPFeedback.app.sessionManager) {
+            window.MCPFeedback.app.sessionManager.clearSessionHistory();
+        } else {
+            console.warn('找不到 SessionManager 實例');
+        }
+    };
+
     console.log('✅ SessionManager (重構版) 模組載入完成');
 
 })();
diff --git a/src/mcp_feedback_enhanced/web/static/js/modules/session/session-data-manager.js b/src/mcp_feedback_enhanced/web/static/js/modules/session/session-data-manager.js
index 7e94977..ffc6d66 100644
--- a/src/mcp_feedback_enhanced/web/static/js/modules/session/session-data-manager.js
+++ b/src/mcp_feedback_enhanced/web/static/js/modules/session/session-data-manager.js
@@ -33,12 +33,18 @@
             totalSessions: 0
         };
 
+        // localStorage 相關設定
+        this.localStorageKey = 'mcp-session-history';
+        this.settingsManager = options.settingsManager || null;
+
         // 回調函數
         this.onSessionChange = options.onSessionChange || null;
         this.onHistoryChange = options.onHistoryChange || null;
         this.onStatsChange = options.onStatsChange || null;
 
-        // 初始化統計資訊
+        // 初始化：載入歷史記錄並清理過期資料
+        this.loadFromLocalStorage();
+        this.cleanupExpiredSessions();
         this.updateStats();
 
         console.log('📊 SessionDataManager 初始化完成');
@@ -196,6 +202,9 @@
             return false;
         }
 
+        // 新增儲存時間戳記
+        sessionData.saved_at = TimeUtils.getCurrentTimestamp();
+
         // 避免重複新增
         const existingIndex = this.sessionHistory.findIndex(s => s.session_id === sessionData.session_id);
         if (existingIndex !== -1) {
@@ -209,6 +218,9 @@
             this.sessionHistory = this.sessionHistory.slice(0, 10);
         }
 
+        // 保存到 localStorage
+        this.saveToLocalStorage();
+
         this.updateStats();
 
         // 觸發回調
@@ -295,6 +307,10 @@
      */
     SessionDataManager.prototype.clearHistory = function() {
         this.sessionHistory = [];
+
+        // 清空 localStorage
+        this.clearLocalStorage();
+
         this.updateStats();
         if (this.onHistoryChange) {
             this.onHistoryChange(this.sessionHistory);
@@ -358,6 +374,191 @@
         return '暫無摘要';
     };
 
+    /**
+     * 從 localStorage 載入會話歷史
+     */
+    SessionDataManager.prototype.loadFromLocalStorage = function() {
+        if (!window.localStorage) {
+            console.warn('📊 localStorage 不可用');
+            return;
+        }
+
+        try {
+            const stored = localStorage.getItem(this.localStorageKey);
+            if (stored) {
+                const data = JSON.parse(stored);
+                if (data && Array.isArray(data.sessions)) {
+                    this.sessionHistory = data.sessions;
+                    console.log('📊 從 localStorage 載入', this.sessionHistory.length, '個會話');
+                }
+            }
+        } catch (error) {
+            console.error('📊 從 localStorage 載入會話歷史失敗:', error);
+        }
+    };
+
+    /**
+     * 保存會話歷史到 localStorage
+     */
+    SessionDataManager.prototype.saveToLocalStorage = function() {
+        if (!window.localStorage) {
+            console.warn('📊 localStorage 不可用');
+            return;
+        }
+
+        try {
+            const data = {
+                sessions: this.sessionHistory,
+                lastCleanup: TimeUtils.getCurrentTimestamp()
+            };
+            localStorage.setItem(this.localStorageKey, JSON.stringify(data));
+            console.log('📊 已保存', this.sessionHistory.length, '個會話到 localStorage');
+        } catch (error) {
+            console.error('📊 保存會話歷史到 localStorage 失敗:', error);
+        }
+    };
+
+    /**
+     * 清空 localStorage 中的會話歷史
+     */
+    SessionDataManager.prototype.clearLocalStorage = function() {
+        if (!window.localStorage) {
+            return;
+        }
+
+        try {
+            localStorage.removeItem(this.localStorageKey);
+            console.log('📊 已清空 localStorage 中的會話歷史');
+        } catch (error) {
+            console.error('📊 清空 localStorage 失敗:', error);
+        }
+    };
+
+    /**
+     * 清理過期的會話
+     */
+    SessionDataManager.prototype.cleanupExpiredSessions = function() {
+        if (!this.settingsManager) {
+            return;
+        }
+
+        const retentionHours = this.settingsManager.get('sessionHistoryRetentionHours', 72);
+        const retentionMs = retentionHours * 60 * 60 * 1000;
+        const now = TimeUtils.getCurrentTimestamp();
+
+        const originalCount = this.sessionHistory.length;
+        this.sessionHistory = this.sessionHistory.filter(function(session) {
+            const sessionAge = now - (session.saved_at || session.completed_at || session.created_at || 0);
+            return sessionAge < retentionMs;
+        });
+
+        const cleanedCount = originalCount - this.sessionHistory.length;
+        if (cleanedCount > 0) {
+            console.log('📊 清理了', cleanedCount, '個過期會話');
+            this.saveToLocalStorage();
+        }
+    };
+
+    /**
+     * 檢查會話是否過期
+     */
+    SessionDataManager.prototype.isSessionExpired = function(session) {
+        if (!this.settingsManager) {
+            return false;
+        }
+
+        const retentionHours = this.settingsManager.get('sessionHistoryRetentionHours', 72);
+        const retentionMs = retentionHours * 60 * 60 * 1000;
+        const now = TimeUtils.getCurrentTimestamp();
+        const sessionTime = session.saved_at || session.completed_at || session.created_at || 0;
+
+        return (now - sessionTime) > retentionMs;
+    };
+
+    /**
+     * 匯出會話歷史
+     */
+    SessionDataManager.prototype.exportSessionHistory = function() {
+        const exportData = {
+            exportedAt: new Date().toISOString(),
+            totalSessions: this.sessionHistory.length,
+            sessions: this.sessionHistory.map(function(session) {
+                return {
+                    session_id: session.session_id,
+                    created_at: session.created_at,
+                    completed_at: session.completed_at,
+                    duration: session.duration,
+                    status: session.status,
+                    project_directory: session.project_directory,
+                    ai_summary: session.summary || session.ai_summary,
+                    saved_at: session.saved_at
+                };
+            })
+        };
+
+        const filename = 'session-history-' + new Date().toISOString().split('T')[0] + '.json';
+        this.downloadJSON(exportData, filename);
+
+        console.log('📊 匯出了', this.sessionHistory.length, '個會話');
+        return filename;
+    };
+
+    /**
+     * 匯出單一會話
+     */
+    SessionDataManager.prototype.exportSingleSession = function(sessionId) {
+        const session = this.sessionHistory.find(function(s) {
+            return s.session_id === sessionId;
+        });
+
+        if (!session) {
+            console.error('📊 找不到會話:', sessionId);
+            return null;
+        }
+
+        const exportData = {
+            exportedAt: new Date().toISOString(),
+            session: {
+                session_id: session.session_id,
+                created_at: session.created_at,
+                completed_at: session.completed_at,
+                duration: session.duration,
+                status: session.status,
+                project_directory: session.project_directory,
+                ai_summary: session.summary || session.ai_summary,
+                saved_at: session.saved_at
+            }
+        };
+
+        const shortId = sessionId.substring(0, 8);
+        const filename = 'session-' + shortId + '-' + new Date().toISOString().split('T')[0] + '.json';
+        this.downloadJSON(exportData, filename);
+
+        console.log('📊 匯出會話:', sessionId);
+        return filename;
+    };
+
+    /**
+     * 下載 JSON 檔案
+     */
+    SessionDataManager.prototype.downloadJSON = function(data, filename) {
+        try {
+            const jsonString = JSON.stringify(data, null, 2);
+            const blob = new Blob([jsonString], { type: 'application/json' });
+            const url = URL.createObjectURL(blob);
+
+            const a = document.createElement('a');
+            a.href = url;
+            a.download = filename;
+            document.body.appendChild(a);
+            a.click();
+            document.body.removeChild(a);
+            URL.revokeObjectURL(url);
+        } catch (error) {
+            console.error('📊 下載檔案失敗:', error);
+        }
+    };
+
     /**
      * 清理資源
      */
diff --git a/src/mcp_feedback_enhanced/web/static/js/modules/session/session-ui-renderer.js b/src/mcp_feedback_enhanced/web/static/js/modules/session/session-ui-renderer.js
index 076e277..a1a21f6 100644
--- a/src/mcp_feedback_enhanced/web/static/js/modules/session/session-ui-renderer.js
+++ b/src/mcp_feedback_enhanced/web/static/js/modules/session/session-ui-renderer.js
@@ -328,19 +328,39 @@
             (window.i18nManager ? window.i18nManager.t('sessionManagement.viewDetails') : '查看') :
             (window.i18nManager ? window.i18nManager.t('sessionManagement.viewDetails') : '詳細資訊');
 
-        const button = DOMUtils.createElement('button', {
+        const viewButton = DOMUtils.createElement('button', {
             className: 'btn-small',
             textContent: buttonText
         });
 
-        // 添加點擊事件
-        DOMUtils.addEventListener(button, 'click', function() {
+        // 添加查看詳情點擊事件
+        DOMUtils.addEventListener(viewButton, 'click', function() {
             if (window.MCPFeedback && window.MCPFeedback.SessionManager) {
                 window.MCPFeedback.SessionManager.viewSessionDetails(sessionData.session_id);
             }
         });
 
-        actions.appendChild(button);
+        actions.appendChild(viewButton);
+
+        // 如果是歷史會話，新增匯出按鈕
+        if (isHistory) {
+            const exportButton = DOMUtils.createElement('button', {
+                className: 'btn-small btn-export',
+                textContent: window.i18nManager ? window.i18nManager.t('sessionHistory.management.exportSingle') : '匯出',
+                style: 'margin-left: 4px; font-size: 11px; padding: 2px 6px;'
+            });
+
+            // 添加匯出點擊事件
+            DOMUtils.addEventListener(exportButton, 'click', function(e) {
+                e.stopPropagation(); // 防止觸發父元素事件
+                if (window.MCPFeedback && window.MCPFeedback.SessionManager) {
+                    window.MCPFeedback.SessionManager.exportSingleSession(sessionData.session_id);
+                }
+            });
+
+            actions.appendChild(exportButton);
+        }
+
         return actions;
     };
 
diff --git a/src/mcp_feedback_enhanced/web/static/js/modules/settings-manager.js b/src/mcp_feedback_enhanced/web/static/js/modules/settings-manager.js
index 37b7bf8..94be7ef 100644
--- a/src/mcp_feedback_enhanced/web/static/js/modules/settings-manager.js
+++ b/src/mcp_feedback_enhanced/web/static/js/modules/settings-manager.js
@@ -35,7 +35,9 @@
             audioNotificationEnabled: false,
             audioNotificationVolume: 50,
             selectedAudioId: 'default-beep',
-            customAudios: []
+            customAudios: [],
+            // 會話歷史設定
+            sessionHistoryRetentionHours: 72
         };
         
         // 當前設定
@@ -407,6 +409,9 @@
 
         // 應用自動提交設定
         this.applyAutoSubmitSettingsToUI();
+
+        // 應用會話歷史設定
+        this.applySessionHistorySettings();
     };
 
     /**
@@ -549,7 +554,20 @@
         }
     };
 
+    /**
+     * 應用會話歷史設定
+     */
+    SettingsManager.prototype.applySessionHistorySettings = function() {
+        // 更新會話歷史保存期限選擇器
+        const sessionHistoryRetentionSelect = Utils.safeQuerySelector('#sessionHistoryRetentionHours');
+        if (sessionHistoryRetentionSelect) {
+            sessionHistoryRetentionSelect.value = this.currentSettings.sessionHistoryRetentionHours.toString();
+        }
 
+        console.log('會話歷史設定已應用到 UI:', {
+            retentionHours: this.currentSettings.sessionHistoryRetentionHours
+        });
+    };
 
     /**
      * 設置事件監聽器
@@ -731,6 +749,44 @@
             });
         }
 
+        // 會話歷史保存期限設定
+        const sessionHistoryRetentionSelect = Utils.safeQuerySelector('#sessionHistoryRetentionHours');
+        if (sessionHistoryRetentionSelect) {
+            sessionHistoryRetentionSelect.addEventListener('change', function(e) {
+                const hours = parseInt(e.target.value);
+                self.set('sessionHistoryRetentionHours', hours);
+                console.log('會話歷史保存期限已更新:', hours, '小時');
+
+                // 觸發清理過期會話
+                if (window.MCPFeedback && window.MCPFeedback.app && window.MCPFeedback.app.sessionManager) {
+                    const sessionManager = window.MCPFeedback.app.sessionManager;
+                    if (sessionManager.dataManager && sessionManager.dataManager.cleanupExpiredSessions) {
+                        sessionManager.dataManager.cleanupExpiredSessions();
+                    }
+                }
+            });
+        }
+
+        // 會話歷史匯出按鈕
+        const exportHistoryBtn = Utils.safeQuerySelector('#exportSessionHistoryBtn');
+        if (exportHistoryBtn) {
+            exportHistoryBtn.addEventListener('click', function() {
+                if (window.MCPFeedback && window.MCPFeedback.SessionManager) {
+                    window.MCPFeedback.SessionManager.exportSessionHistory();
+                }
+            });
+        }
+
+        // 會話歷史清空按鈕
+        const clearHistoryBtn = Utils.safeQuerySelector('#clearSessionHistoryBtn');
+        if (clearHistoryBtn) {
+            clearHistoryBtn.addEventListener('click', function() {
+                if (window.MCPFeedback && window.MCPFeedback.SessionManager) {
+                    window.MCPFeedback.SessionManager.clearSessionHistory();
+                }
+            });
+        }
+
         // 重置設定
         const resetBtn = Utils.safeQuerySelector('#resetSettingsBtn');
         if (resetBtn) {
diff --git a/src/mcp_feedback_enhanced/web/templates/feedback.html b/src/mcp_feedback_enhanced/web/templates/feedback.html
index 65261b0..f99df32 100644
--- a/src/mcp_feedback_enhanced/web/templates/feedback.html
+++ b/src/mcp_feedback_enhanced/web/templates/feedback.html
@@ -884,6 +884,48 @@
                     </div>
                 </div>
 
+                <!-- 會話歷史管理卡片 -->
+                <div class="settings-card">
+                    <div class="settings-card-header">
+                        <h3 class="settings-card-title" data-i18n="sessionHistory.management.title">📚 會話歷史管理</h3>
+                    </div>
+                    <div class="settings-card-body">
+                        <div class="setting-item">
+                            <div class="setting-info">
+                                <div class="setting-label" data-i18n="sessionHistory.management.retentionPeriod">保存期限</div>
+                                <div class="setting-description" data-i18n="sessionHistory.management.description">
+                                    管理本地儲存的會話歷史記錄，包括保存期限設定和資料匯出功能
+                                </div>
+                            </div>
+                            <div class="setting-control">
+                                <select id="sessionHistoryRetentionHours" class="form-select" style="width: 150px;">
+                                    <option value="24" data-i18n="sessionHistory.retention.24hours">24 小時</option>
+                                    <option value="72" data-i18n="sessionHistory.retention.72hours">72 小時</option>
+                                    <option value="168" data-i18n="sessionHistory.retention.168hours">7 天</option>
+                                    <option value="720" data-i18n="sessionHistory.retention.720hours">30 天</option>
+                                </select>
+                            </div>
+                        </div>
+
+                        <div class="setting-item" style="border-bottom: none;">
+                            <div class="setting-info">
+                                <div class="setting-label" data-i18n="sessionHistory.management.export">資料管理</div>
+                                <div class="setting-description">
+                                    匯出或清空本地儲存的會話歷史記錄
+                                </div>
+                            </div>
+                            <div class="setting-control" style="display: flex; gap: 8px;">
+                                <button id="exportSessionHistoryBtn" class="btn btn-secondary" style="font-size: 12px; padding: 6px 12px;">
+                                    <span data-i18n="sessionHistory.management.exportAll">匯出全部</span>
+                                </button>
+                                <button id="clearSessionHistoryBtn" class="btn btn-secondary" style="font-size: 12px; padding: 6px 12px; color: var(--error-color); border-color: var(--error-color);">
+                                    <span data-i18n="sessionHistory.management.clear">清空</span>
+                                </button>
+                            </div>
+                        </div>
+                    </div>
+                </div>
+
                 <!-- 提示詞管理卡片 -->
                 <div class="settings-card">
                     <div class="settings-card-header">