优化时间范围选择

server/index.js

@@ -626,6 +626,26 @@ app.get('/api/metrics/server-details', async (req, res) => {
   }
 });
 
+// Get historical metrics for a specific server
+app.get('/api/metrics/server-history', async (req, res) => {
+  const { instance, job, source, metric, range, start, end } = req.query;
+  
+  if (!instance || !job || !source || !metric) {
+    return res.status(400).json({ error: 'instance, job, source, and metric are required' });
+  }
+
+  try {
+    const [rows] = await db.query('SELECT url FROM prometheus_sources WHERE name = ?', [source]);
+    if (rows.length === 0) return res.status(404).json({ error: 'Source not found' });
+    const sourceUrl = rows[0].url;
+
+    const data = await prometheusService.getServerHistory(sourceUrl, instance, job, metric, range, start, end);
+    res.json(data);
+  } catch (err) {
+    res.status(500).json({ error: err.message });
+  }
+});
+
 // SPA fallback
 app.get('*', (req, res, next) => {
   if (req.path.startsWith('/api/') || req.path.includes('.')) return next();