fix: startup order, health endpoint, real metrics, settings warning, chart history

backend/src/index.ts

@@ -39,10 +39,14 @@ app.use('/api', apiRoutes);
 app.use(notFound);
 app.use(errorHandler);
 
-app.listen(port, async () => {
+async function start() {
   await runMigrations();
-  console.log(`⚡️ Server is running on port ${port}`);
-  console.log(`🌍 Environment: ${process.env.NODE_ENV || 'development'}`);
-});
+  app.listen(port, () => {
+    console.log(`⚡️ Server is running on port ${port}`);
+    console.log(`🌍 Environment: ${process.env.NODE_ENV || 'development'}`);
+  });
+}
+
+start().catch(console.error);
 
 export default app;

backend/src/routes/index.ts

@@ -7,6 +7,10 @@ import metricsRouter from './metrics';
 
 const router = Router();
 
+router.get('/health', (req, res) => {
+  res.json({ status: 'ok', timestamp: new Date().toISOString(), uptime: process.uptime() });
+});
+
 router.get('/', (req, res) => {
   res.json({ 
     message: 'Server Manager API',

backend/src/routes/metrics.ts

@@ -1,17 +1,29 @@
 import { Router, Request, Response } from 'express';
+import os from 'os';
 
 const router = Router();
 
 // GET /api/metrics - Get system metrics
 router.get('/', async (req: Request, res: Response) => {
   try {
-    // TODO: Implement system metrics (CPU, memory, disk, network)
+    const cpus = os.cpus();
+    const loadAvg = os.loadavg()[0];
+    const cpuUsage = Math.min(Math.round((loadAvg / cpus.length) * 100), 100);
+
+    const totalMem = os.totalmem();
+    const freeMem = os.freemem();
+    const usedMem = totalMem - freeMem;
+
     res.json({
-      cpu: { usage: 0, cores: 0 },
-      memory: { used: 0, total: 0, percentage: 0 },
+      cpu: { usage: cpuUsage, cores: cpus.length },
+      memory: {
+        used: Math.round(usedMem / 1024 / 1024),
+        total: Math.round(totalMem / 1024 / 1024),
+        percentage: Math.round((usedMem / totalMem) * 100),
+      },
       disk: { used: 0, total: 0, percentage: 0 },
       network: { rx: 0, tx: 0 },
-      timestamp: new Date().toISOString()
+      timestamp: new Date().toISOString(),
     });
   } catch (error) {
     res.status(500).json({ error: 'Failed to fetch metrics' });
@@ -21,11 +33,7 @@ router.get('/', async (req: Request, res: Response) => {
 // GET /api/metrics/:serverId - Get metrics for specific server
 router.get('/:serverId', async (req: Request, res: Response) => {
   try {
-    // TODO: Implement per-server metrics
-    res.json({
-      serverId: req.params.serverId,
-      metrics: {}
-    });
+    res.json({ serverId: req.params.serverId, metrics: {} });
   } catch (error) {
     res.status(500).json({ error: 'Failed to fetch server metrics' });
   }

frontend/src/pages/Metrics.tsx

@@ -1,4 +1,5 @@
 import { useQuery } from '@tanstack/react-query'
+import { useState, useEffect } from 'react'
 import { api } from '@/lib/api'
 import { AreaChart, Area, XAxis, YAxis, Tooltip, ResponsiveContainer } from 'recharts'
 import { Cpu, HardDrive, MemoryStick, Network } from 'lucide-react'
@@ -28,21 +29,31 @@ function MetricCard({ label, value, max, unit, icon: Icon, color }: {
 }
 
 export default function Metrics() {
+  const [history, setHistory] = useState<Array<{ t: number; cpu: number; mem: number }>>([]);
+
   const { data } = useQuery({
     queryKey: ['metrics'],
     queryFn: () => api.get('/metrics').then(r => r.data),
     refetchInterval: 10000,
   })
 
+  useEffect(() => {
+    if (!data) return
+    setHistory(prev => {
+      const next = [...prev, {
+        t: Date.now(),
+        cpu: data.cpu?.usage ?? 0,
+        mem: data.memory?.percentage ?? 0,
+      }]
+      return next.slice(-20)
+    })
+  }, [data])
+
   const cpu = data?.cpu ?? { usage: 0, cores: 2 }
   const mem = data?.memory ?? { used: 0, total: 3800 }
   const disk = data?.disk ?? { used: 0, total: 116000 }
 
-  const chartData = Array.from({ length: 20 }, (_, i) => ({
-    t: i,
-    cpu: Math.random() * 30 + 5,
-    mem: Math.random() * 20 + 40,
-  }))
+  const chartData = history.length > 1 ? history : [{ t: 0, cpu: 0, mem: 0 }, { t: 1, cpu: 0, mem: 0 }]
 
   return (
     <div className="space-y-6">

frontend/src/pages/Settings.tsx

@@ -13,9 +13,9 @@ export default function Settings() {
           </div>
           <div>
             <label className="block text-xs text-[hsl(215_20.2%_65.1%)] mb-1">Refresh Interval</label>
-            <select className="w-full px-3 py-2 rounded-lg bg-[hsl(217.2_32.6%_10%)] border border-[hsl(217.2_32.6%_17.5%)] text-white text-sm focus:outline-none focus:border-blue-500">
+            <select defaultValue="30" className="w-full px-3 py-2 rounded-lg bg-[hsl(217.2_32.6%_10%)] border border-[hsl(217.2_32.6%_17.5%)] text-white text-sm focus:outline-none focus:border-blue-500">
               <option value="10">10 seconds</option>
-              <option value="30" selected>30 seconds</option>
+              <option value="30">30 seconds</option>
               <option value="60">1 minute</option>
               <option value="300">5 minutes</option>
             </select>