diff --git a/app/static/index.html b/app/static/index.html
index 2cd175f..2c27ad5 100644
--- a/app/static/index.html
+++ b/app/static/index.html
@@ -1330,10 +1330,14 @@
 
         // Navigation
         function navigateTo(page) {
+            if (!page) return;
+            const pageEl = document.getElementById(`page-${page}`);
+            if (!pageEl) return;
+            
             document.querySelectorAll('.page').forEach(p => p.classList.remove('active'));
             document.querySelectorAll('.nav-item').forEach(n => n.classList.remove('active'));
 
-            document.getElementById(`page-${page}`).classList.add('active');
+            pageEl.classList.add('active');
             document.querySelector(`.nav-item[data-page="${page}"]`).classList.add('active');
 
             const titles = {
@@ -1347,7 +1351,7 @@
             document.getElementById('pageTitle').textContent = titles[page] || page;
         }
 
-        document.querySelectorAll('.nav-item').forEach(item => {
+        document.querySelectorAll('.nav-item[data-page]').forEach(item => {
             item.addEventListener('click', () => navigateTo(item.dataset.page));
         });
 
@@ -2019,15 +2023,15 @@
 
             const jsonStr = JSON.stringify(exportObj, null, 2);
             const blob = new Blob([jsonStr], { type: 'application/json' });
-            const url = URL.createObjectURL(blob);
+            const downloadUrl = URL.createObjectURL(blob);
             
             const a = document.createElement('a');
-            a.href = url;
+            a.href = downloadUrl;
             a.download = filename;
             document.body.appendChild(a);
             a.click();
             document.body.removeChild(a);
-            URL.revokeObjectURL(url);
+            URL.revokeObjectURL(downloadUrl);
 
             const periodCount = currentQueryData.timeframes.length;
             const totalCandles = currentQueryData.timeframes.reduce((sum, tf) => sum + (tf.candles ? tf.candles.length : 0), 0);
@@ -2096,9 +2100,9 @@
                         }
                         
                         const queryString = params.toString();
-                        const url = `${API}/data/latest/${symbol}${queryString ? '?' + queryString : ''}`;
+                        const fetchUrl = `${API}/data/latest/${symbol}${queryString ? '?' + queryString : ''}`;
                         
-                        const fetchRes = await fetch(url);
+                        const fetchRes = await fetch(fetchUrl);
                         if (!fetchRes.ok) {
                             failedCount++;
                             failedSymbols.push(symbol);
@@ -2133,15 +2137,15 @@
                         
                         const jsonStr = JSON.stringify(exportObj, null, 2);
                         const blob = new Blob([jsonStr], { type: 'application/json' });
-                        const url = URL.createObjectURL(blob);
+                        const downloadUrl = URL.createObjectURL(blob);
                         
                         const a = document.createElement('a');
-                        a.href = url;
+                        a.href = downloadUrl;
                         a.download = filename;
                         document.body.appendChild(a);
                         a.click();
                         document.body.removeChild(a);
-                        URL.revokeObjectURL(url);
+                        URL.revokeObjectURL(downloadUrl);
                         
                         const candleCount = fetchData.timeframes.reduce((sum, tf) => sum + (tf.candles ? tf.candles.length : 0), 0);
                         successCount++;
@@ -2618,51 +2622,6 @@
             }
         }
 
-        // Load Tasks
-        async function loadTasks() {
-            try {
-                const res = await fetch(`${API}/tasks`);
-                const data = await res.json();
-
-                if (!data.tasks.length) {
-                    document.getElementById('taskTable').innerHTML = '<div class="empty-state"><svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><circle cx="12" cy="12" r="10"/><polyline points="12 6 12 12 16 14"/></svg><p>暂无定时任务</p></div>';
-                    return;
-                }
-
-                let html = `<table>
-                    <thead><tr><th>ID</th><th>品种</th><th>周期</th><th>间隔</th><th>状态</th><th>最后执行</th><th>操作</th></tr></thead>
-                    <tbody>`;
-
-                for (const t of data.tasks) {
-                    const statusBadge = t.running
-                        ? '<span class="badge badge-success">运行中</span>'
-                        : t.enabled
-                            ? '<span class="badge badge-warning">已停止</span>'
-                            : '<span class="badge badge-gray">已禁用</span>';
-
-                    html += `<tr>
-                        <td>${t.id}</td>
-                        <td><code style="color: var(--primary);">${t.symbol}</code></td>
-                        <td>${t.periods.join(', ')}</td>
-                        <td>${t.interval_seconds}s</td>
-                        <td>${statusBadge}</td>
-                        <td>${t.last_run ? new Date(t.last_run).toLocaleString() : '-'}</td>
-                        <td>
-                            ${t.running
-                                ? `<button class="btn btn-warning btn-sm" onclick="stopTask(${t.id})">停止</button>`
-                                : `<button class="btn btn-success btn-sm" onclick="startTask(${t.id})">启动</button>`
-                            }
-                            <button class="btn btn-danger btn-sm" onclick="deleteTask(${t.id})">删除</button>
-                        </td>
-                    </tr>`;
-                }
-                html += '</tbody></table>';
-                document.getElementById('taskTable').innerHTML = html;
-            } catch (e) {
-                addLog(`加载任务失败: ${e.message}`, 'error');
-            }
-        }
-
         async function stopTask(id) {
             await fetch(`${API}/tasks/${id}/stop`, { method: 'POST' });
             showToast('任务已停止', 'success');
diff --git a/data/buffer.db b/data/buffer.db
index d71af57..d3fb694 100644
Binary files a/data/buffer.db and b/data/buffer.db differ
diff --git a/data/futures_analysis.db b/data/futures_analysis.db
index 6ff1d2a..df11f42 100644
Binary files a/data/futures_analysis.db and b/data/futures_analysis.db differ