refactor(dashboard): 移除时间范围和自动刷新功能，简化控制面板

删除时间范围选择器和自动刷新功能，仅保留币对选择和刷新按钮
更新相关数据加载逻辑，默认使用24小时时间范围

src/dashboard/static/index.html

@@ -233,34 +233,14 @@
 
         <div class="controls">
             <div class="control-group">
-                <div class="control-item">
-                    <label for="symbolSelect">选择币对:</label>
-                    <select id="symbolSelect">
-                        <option value="">请选择币对...</option>
-                    </select>
-                </div>
-                <div class="control-item">
-                    <label for="timeRange">时间范围:</label>
-                    <select id="timeRange">
-                        <option value="1">1小时</option>
-                        <option value="6">6小时</option>
-                        <option value="24" selected>24小时</option>
-                        <option value="72">3天</option>
-                        <option value="168">7天</option>
-                    </select>
-                </div>
-                <div class="control-item">
-                    <label for="autoRefresh">自动刷新:</label>
-                    <select id="autoRefresh">
-                        <option value="0">关闭</option>
-                        <option value="5">5秒</option>
-                        <option value="10" selected>10秒</option>
-                        <option value="30">30秒</option>
-                        <option value="60">1分钟</option>
-                    </select>
-                </div>
-                <button class="btn" onclick="loadData()">刷新数据</button>
+            <div class="control-item">
+                <label for="symbolSelect">选择币对:</label>
+                <select id="symbolSelect">
+                    <option value="">请选择币对...</option>
+                </select>
             </div>
+            <button class="btn" onclick="loadData()">刷新数据</button>
+        </div>
         </div>
 
         <div class="content">
@@ -329,17 +309,6 @@
                     loadData();
                 }
             });
-
-            document.getElementById('timeRange').addEventListener('change', function() {
-                const symbol = document.getElementById('symbolSelect').value;
-                if (symbol) {
-                    loadData();
-                }
-            });
-
-            document.getElementById('autoRefresh').addEventListener('change', function() {
-                setupAutoRefresh();
-            });
         }
 
         async function loadSymbols() {
@@ -363,7 +332,6 @@
 
         async function loadData() {
             const symbol = document.getElementById('symbolSelect').value;
-            const hours = document.getElementById('timeRange').value;
             
             if (!symbol) {
                 showError('请先选择币对');
@@ -375,8 +343,8 @@
             try {
                 // 并行加载数据、统计信息和24小时缩略图
                 const [dataResponse, statsResponse, latestResponse, thumbnailResponse] = await Promise.all([
-                    axios.get(`${API_BASE}/data/${symbol}?hours=${hours}&limit=1000`),
-                    axios.get(`${API_BASE}/stats/${symbol}?hours=${hours}`),
+                    axios.get(`${API_BASE}/data/${symbol}?hours=24&limit=1000`),
+                    axios.get(`${API_BASE}/stats/${symbol}?hours=24`),
                     axios.get(`${API_BASE}/latest/${symbol}`),
                     axios.get(`${API_BASE}/thumbnail/${symbol}`)
                 ]);