refactor: 全局重命名 k8s → kubernetes (前后端+路由+表名+文件)

后端:
  - pkg/k8sclient → pkg/kubernetesclient
  - models/k8s.go → models/kubernetes.go
  - handlers/k8s.go → handlers/kubernetes.go
  - K8sCluster/K8sNode/.. → KubernetesCluster/KubernetesNode/..
  - K8sHandler → KubernetesHandler
  - 路由: /k8s-clusters → /kubernetes-clusters
  - 路由: /k8s/:code/namespace/:ns/... → /kubernetes/:code/namespace/:ns/... (Kuboard风格)
  - 表前缀: container_k8s_ → container_kubernetes_

前端:
  - components/k8s/ → components/kubernetes/
  - K8sClusters → KubernetesClusters
  - K8sWorkloads → KubernetesWorkloads
  - K8sNodes → KubernetesNodes
  - k8sApi → kubernetesApi
  - 路由前缀: /k8s/ → /kubernetes/

测试验证:
✅ /kubernetes/k8s-cluster-liren/namespace/kube-system/deployments → 3 items
✅ /kubernetes/k8s-cluster-liren/namespace/kube-system/pods → 7 items
✅ /kubernetes/k8s-cluster-liren/namespace/kube-system/services → 4 items
✅ /kubernetes/k8s-cluster-liren/namespace/kube-system/configmaps → 6 items
✅ /kubernetes/k8s-cluster-liren/namespace/kube-system/secrets → 1 item
✅ /kubernetes/k8s-cluster-liren/namespaces → 4 items

backend/pkg/database/database.go

@@ -66,12 +66,12 @@ func AutoMigrate(db *gorm.DB) error {
 		&models.CloudAccount{},
 		&models.Region{},
 		&models.Domain{},
-		&models.K8sCluster{},
-		&models.K8sNode{},
-		&models.K8sPod{},
-		&models.K8sDeployment{},
-		&models.K8sService{},
-		&models.K8sIngress{},
+		&models.KubernetesCluster{},
+		&models.KubernetesNode{},
+		&models.KubernetesPod{},
+		&models.KubernetesDeployment{},
+		&models.KubernetesService{},
+		&models.KubernetesIngress{},
 		&models.AlertRule{},
 		&models.AlertEvent{},
 		&models.NotifyChannel{},

backend/pkg/kubernetesclient/client.go

@@ -880,3 +880,68 @@ func (c *Client) ListNamespaces() ([]string, error) {
 	}
 	return names, nil
 }
+
+// --- ConfigMap ---
+
+// ConfigMapList response
+type ConfigMapList struct {
+	Items []ConfigMapItem `json:"items"`
+}
+
+// ConfigMapItem represents a ConfigMap
+type ConfigMapItem struct {
+	Metadata ObjectMeta        `json:"metadata"`
+	Data     map[string]string `json:"data"`
+}
+
+// ListConfigMaps fetches ConfigMaps in a namespace
+func (c *Client) ListConfigMaps(namespace string) (*ConfigMapList, error) {
+	var result ConfigMapList
+	path := fmt.Sprintf("/api/v1/namespaces/%s/configmaps", namespace)
+	if err := c.get(path, &result); err != nil {
+		return nil, err
+	}
+	return &result, nil
+}
+
+// --- Secret ---
+
+// SecretList response
+type SecretList struct {
+	Items []SecretItem `json:"items"`
+}
+
+// SecretItem represents a Secret (return keys only, not values)
+type SecretItem struct {
+	Metadata ObjectMeta  `json:"metadata"`
+	Type     string      `json:"type"`
+	DataKeys []string    `json:"-"`
+}
+
+// ListSecrets fetches Secrets in a namespace (names+types only, no data)
+func (c *Client) ListSecrets(namespace string) (*SecretList, error) {
+	var result struct {
+		Items []struct {
+			Metadata ObjectMeta       `json:"metadata"`
+			Type     string           `json:"type"`
+			Data     map[string]string `json:"data"`
+		} `json:"items"`
+	}
+	path := fmt.Sprintf("/api/v1/namespaces/%s/secrets", namespace)
+	if err := c.get(path, &result); err != nil {
+		return nil, err
+	}
+	items := make([]SecretItem, len(result.Items))
+	for i, item := range result.Items {
+		keys := make([]string, 0, len(item.Data))
+		for k := range item.Data {
+			keys = append(keys, k)
+		}
+		items[i] = SecretItem{
+			Metadata: item.Metadata,
+			Type:     item.Type,
+			DataKeys: keys,
+		}
+	}
+	return &SecretList{Items: items}, nil
+}