feat: 服务器资源趋势图表（Chart.js本地化+CPU/内存/磁盘趋势）

static/js/app.js

@@ -1,5 +1,5 @@
 /* vps-manager 前端应用（Vue 3 组件化） */
-const { createApp, reactive, ref, computed, onMounted, watch } = Vue;
+const { createApp, reactive, ref, computed, onMounted, watch, nextTick } = Vue;
 const Api = window.VpsApi;
 const Fmt = window.VpsFmt;
 
@@ -156,7 +156,7 @@ async function viewServer(a) {
   store.view = 'servers';
   try {
     const [metrics, info, checks] = await Promise.all([
-      Api.get('/monitor/' + a.id + '/metrics'),
+      Api.get('/monitor/' + a.id + '/metrics?limit=200'),
       Api.get('/monitor/' + a.id + '/info'),
       Api.get('/monitor/' + a.id + '/security'),
     ]);
@@ -494,6 +494,10 @@ const ServersView = {
           <div>公网 IP：{{ m.info.public_ip || '—' }}</div><div>状态：{{ m.info.status }}</div>
         </div>
       </div>
+      <div v-if="m.metrics && m.metrics.length > 1" class="bg-white dark:bg-slate-900 rounded-xl border border-slate-200 dark:border-slate-800 p-4">
+        <h3 class="font-semibold mb-2 text-sm">资源趋势（最近 {{ m.metrics.length }} 次采样）</h3>
+        <canvas id="metricsChart" height="90"></canvas>
+      </div>
       <div class="bg-white dark:bg-slate-900 rounded-xl border border-slate-200 dark:border-slate-800 p-4">
         <h3 class="font-semibold mb-2 text-sm">安全检查</h3>
         <div class="space-y-2">
@@ -513,6 +517,34 @@ const ServersView = {
   setup() {
     const m = computed(() => store.serverMetrics);
     const latest = computed(() => (m.value.metrics && m.value.metrics.length) ? m.value.metrics[0] : null);
+    let chartInstance = null;
+    function renderChart() {
+      const canvas = document.getElementById('metricsChart');
+      if (!canvas || !window.Chart) return;
+      if (!m.value.metrics || m.value.metrics.length < 2) return;
+      if (chartInstance) { chartInstance.destroy(); chartInstance = null; }
+      const data = [...m.value.metrics].reverse();
+      const labels = data.map(p => new Date(p.ts).toLocaleTimeString('zh-CN', { hour: '2-digit', minute: '2-digit' }));
+      chartInstance = new Chart(canvas, {
+        type: 'line',
+        data: {
+          labels,
+          datasets: [
+            { label: 'CPU %', data: data.map(p => p.cpu_pct), borderColor: '#3b82f6', backgroundColor: 'rgba(59,130,246,0.1)', tension: 0.3, pointRadius: 0 },
+            { label: '内存 %', data: data.map(p => p.mem_pct), borderColor: '#10b981', backgroundColor: 'rgba(16,185,129,0.1)', tension: 0.3, pointRadius: 0 },
+            { label: '磁盘 %', data: data.map(p => p.disk_pct), borderColor: '#f59e0b', backgroundColor: 'rgba(245,158,11,0.1)', tension: 0.3, pointRadius: 0 },
+          ],
+        },
+        options: {
+          responsive: true,
+          interaction: { mode: 'index', intersect: false },
+          scales: { y: { min: 0, max: 100, ticks: { callback: v => v + '%' } } },
+          plugins: { legend: { position: 'top' } },
+        },
+      });
+    }
+    watch(m, () => { nextTick(renderChart); }, { deep: true });
+    onMounted(() => { nextTick(renderChart); });
     return { store, Fmt, m, latest };
   },
 };