fix: 集群表单简化 + CPU/内存显示优化

- 移除独立 code 字段，名称即 code（正则校验英文/数字/连字符）
- 名称输入实时校验 + 红色边框提示，首尾不允许连字符
- CPU/内存使用率：有数据时正常显示，无 metrics 时显示「已接入 N 节点 · N Pod · 资源使用率待采集」

frontend/src/components/kubernetes/KubernetesClusterDialog.tsx

@@ -15,9 +15,11 @@ import {
 import { kubernetesApi } from '@/services/api';
 import { toast } from 'sonner';
 
+// 名称即 code，只允许英文/数字/连字符
+const NAME_RE = /^[a-zA-Z0-9]([a-zA-Z0-9-]*[a-zA-Z0-9])?$/;
+
 const emptyForm = {
   name: '',
-  code: '',
   version: '',
   description: '',
   config_type: 1, // 0=Token, 1=Kubeconfig
@@ -39,33 +41,30 @@ export function KubernetesClusterDialog({
 }) {
   const [formData, setFormData] = useState({ ...emptyForm });
   const [submitting, setSubmitting] = useState(false);
-  const [hasToken, setHasToken] = useState(false);   // 已配置 Token 标记 // Logan.Li
-  const [hasKubeConfig, setHasKubeConfig] = useState(false); // 已配置 Kubeconfig 标记
+  const [hasToken, setHasToken] = useState(false);
+  const [hasKubeConfig, setHasKubeConfig] = useState(false);
+  const [nameError, setNameError] = useState('');
 
-  // 打开时同步表单（编辑时拉取详情，新建时重置）
   useEffect(() => {
     if (!open) return;
     if (editingCluster && editingCluster.id) {
-      // 编辑模式：拉取详情获取 has_token/has_kube_config 标记 // Logan.Li
       kubernetesApi.getClusterDetail(editingCluster.id).then((res: any) => {
         const d = res || {};
         setHasToken(!!d.has_token);
         setHasKubeConfig(!!d.has_kube_config);
         setFormData({
           name: d.name || '',
-          code: d.code || d.name?.toLowerCase().replace(/[^a-z0-9-]/g, '-').replace(/^-+|-+$/g, '') || '',
           version: d.version || '',
           description: d.description || '',
           config_type: Number(d.config_type ?? 1),
           api_server: d.api_server || '',
-          token: '',         // 不回填原文，留空不修改
-          kube_config: '',   // 不回填原文，留空不修改
+          token: '',
+          kube_config: '',
         });
+        setNameError('');
       }).catch(() => {
-        // 降级：用列表数据
         setFormData({
           name: editingCluster.name || '',
-          code: editingCluster.code || editingCluster.name?.toLowerCase().replace(/[^a-z0-9-]/g, '-').replace(/^-+|-+$/g, '') || '',
           version: editingCluster.version || '',
           description: editingCluster.description || '',
           config_type: Number(editingCluster.config_type ?? 1),
@@ -73,15 +72,27 @@ export function KubernetesClusterDialog({
           token: '',
           kube_config: '',
         });
+        setNameError('');
       });
     } else {
       setHasToken(false);
       setHasKubeConfig(false);
       setFormData({ ...emptyForm });
+      setNameError('');
     }
   }, [open, editingCluster]);
 
-  // 从 kubeconfig YAML 中解析 server 地址
+  const handleNameChange = (value: string) => {
+    setFormData({ ...formData, name: value });
+    if (!value.trim()) {
+      setNameError('');
+    } else if (!NAME_RE.test(value)) {
+      setNameError('只允许英文、数字和连字符(-)，首尾不能是连字符');
+    } else {
+      setNameError('');
+    }
+  };
+
   const parseApiServer = (yaml: string): string => {
     const match = yaml.match(/^\s*server:\s*(\S+)\s*$/m);
     return match ? match[1] : '';
@@ -97,12 +108,14 @@ export function KubernetesClusterDialog({
   };
 
   const handleSubmit = async () => {
-    if (!formData.name.trim() || !formData.code.trim()) { toast.error('请填写集群名称和代码'); return; }
+    if (!formData.name.trim() || !NAME_RE.test(formData.name.trim())) {
+      toast.error('请输入有效的集群名称（英文/数字/连字符）'); return;
+    }
     try {
       setSubmitting(true);
       const payload = {
-        name: formData.name,
-        code: formData.code,
+        name: formData.name.trim(),
+        code: formData.name.trim(),  // 名称即 code
         version: formData.version,
         description: formData.description,
         config_type: formData.config_type,
@@ -124,6 +137,8 @@ export function KubernetesClusterDialog({
     }
   };
 
+  const canSubmit = submitting || !formData.name.trim() || !!nameError;
+
   return (
     <Dialog open={open} onOpenChange={onOpenChange}>
       <DialogContent className="bg-[var(--dg-bg-secondary)] border-[var(--dg-border)] max-w-2xl">
@@ -141,30 +156,21 @@ export function KubernetesClusterDialog({
               <Label className="text-[var(--dg-text-secondary)]">集群名称</Label>
               <Input
                 value={formData.name}
-                onChange={(e) => {
-                  const name = e.target.value;
-                  const code = name.toLowerCase().replace(/[^a-z0-9-]/g, '-').replace(/^-+|-+$/g, '');
-                  setFormData({ ...formData, name, code: formData.code || code });
-                }}
-                placeholder="例如：prod-cluster"
-                className="bg-[var(--dg-bg-tertiary)] border-[var(--dg-border)] text-[var(--dg-text-primary)] placeholder:text-[var(--dg-text-muted)]"
-              />
-            </div>
-            <div className="space-y-2">
-              <Label className="text-[var(--dg-text-secondary)]">集群代码 (Code)</Label>
-              <Input
-                value={formData.code}
-                onChange={(e) => setFormData({ ...formData, code: e.target.value })}
+                onChange={(e) => handleNameChange(e.target.value)}
                 placeholder="如: prod-cluster"
-                className="bg-[var(--dg-bg-tertiary)] border-[var(--dg-border)] text-[var(--dg-text-primary)] placeholder:text-[var(--dg-text-muted)] font-mono text-sm"
+                className={`bg-[var(--dg-bg-tertiary)] border-[var(--dg-border)] text-[var(--dg-text-primary)] placeholder:text-[var(--dg-text-muted)] ${nameError ? 'border-red-500' : ''}`}
               />
+              {nameError && <p className="text-xs text-red-400">{nameError}</p>}
+              <p className="text-xs text-[var(--dg-text-muted)]">
+                只允许英文、数字和连字符(-)，首尾不能是连字符。名称将作为集群唯一标识。
+              </p>
             </div>
             <div className="space-y-2">
               <Label className="text-[var(--dg-text-secondary)]">版本（可选）</Label>
               <Input
                 value={formData.version}
                 onChange={(e) => setFormData({ ...formData, version: e.target.value })}
-                placeholder="例如：1.28.0"
+                placeholder="如: 1.28.0"
                 className="bg-[var(--dg-bg-tertiary)] border-[var(--dg-border)] text-[var(--dg-text-primary)] placeholder:text-[var(--dg-text-muted)]"
               />
             </div>
@@ -251,7 +257,7 @@ export function KubernetesClusterDialog({
           </Button>
           <Button
             onClick={handleSubmit}
-            disabled={submitting || !formData.name.trim() || !formData.code.trim()}
+            disabled={canSubmit}
             className="bg-[var(--dg-blue)] hover:opacity-90 text-white"
           >
             {submitting ? '保存中...' : editingCluster ? '保存' : '添加'}

frontend/src/components/kubernetes/KubernetesClusters.tsx

@@ -226,6 +226,7 @@ export function KubernetesClusters() {
           filteredClusters.map((cluster) => {
             const cpuUsage = Number(cluster.cpu_usage || 0);
             const memoryUsage = Number(cluster.memory_usage || 0);
+            const hasMetrics = cpuUsage > 0 || memoryUsage > 0;
             return (
               <Card
                 key={cluster.id}
@@ -326,32 +327,38 @@ export function KubernetesClusters() {
                     </div>
                   </div>
                   <div className="space-y-2">
-                    <div className="flex items-center gap-2">
-                      <span className="text-xs text-slate-500 w-10">CPU</span>
-                      <div className="flex-1 h-1.5 bg-slate-800 rounded-full overflow-hidden">
-                        <div
-                          className={cn(
-                            'h-full rounded-full',
-                            cpuUsage > 80 ? 'bg-red-400' : cpuUsage > 60 ? 'bg-amber-400' : 'bg-emerald-400'
-                          )}
-                          style={{ width: `${cpuUsage}%` }}
-                        />
-                      </div>
-                      <span className="text-xs text-slate-400 w-10 text-right">{cpuUsage.toFixed(1)}%</span>
-                    </div>
-                    <div className="flex items-center gap-2">
-                      <span className="text-xs text-slate-500 w-10">内存</span>
-                      <div className="flex-1 h-1.5 bg-slate-800 rounded-full overflow-hidden">
-                        <div
-                          className={cn(
-                            'h-full rounded-full',
-                            memoryUsage > 80 ? 'bg-red-400' : memoryUsage > 60 ? 'bg-amber-400' : 'bg-emerald-400'
-                          )}
-                          style={{ width: `${memoryUsage}%` }}
-                        />
-                      </div>
-                      <span className="text-xs text-slate-400 w-10 text-right">{memoryUsage.toFixed(1)}%</span>
-                    </div>
+                    {hasMetrics ? (
+                      <>
+                        <div className="flex items-center gap-2">
+                          <span className="text-xs text-slate-500 w-10">CPU</span>
+                          <div className="flex-1 h-1.5 bg-slate-800 rounded-full overflow-hidden">
+                            <div
+                              className={cn(
+                                'h-full rounded-full',
+                                cpuUsage > 80 ? 'bg-red-400' : cpuUsage > 60 ? 'bg-amber-400' : 'bg-emerald-400'
+                              )}
+                              style={{ width: `${Math.min(cpuUsage, 100)}%` }}
+                            />
+                          </div>
+                          <span className="text-xs text-slate-400 w-10 text-right">{cpuUsage.toFixed(1)}%</span>
+                        </div>
+                        <div className="flex items-center gap-2">
+                          <span className="text-xs text-slate-500 w-10">内存</span>
+                          <div className="flex-1 h-1.5 bg-slate-800 rounded-full overflow-hidden">
+                            <div
+                              className={cn(
+                                'h-full rounded-full',
+                                memoryUsage > 80 ? 'bg-red-400' : memoryUsage > 60 ? 'bg-amber-400' : 'bg-emerald-400'
+                              )}
+                              style={{ width: `${Math.min(memoryUsage, 100)}%` }}
+                            />
+                          </div>
+                          <span className="text-xs text-slate-400 w-10 text-right">{memoryUsage.toFixed(1)}%</span>
+                        </div>
+                      </>
+                    ) : (
+                      <div className="text-xs text-slate-600 text-center">已接入 {cluster.node_count || 0} 节点 · {cluster.pod_count || 0} Pod · 资源使用率待采集</div>
+                    )}
                   </div>
                 </CardContent>
               </Card>