feat(frontend): add Helm chart browser, monitoring, chart-references and values templates pages

Add new frontend pages for the multi-tenant OCDP platform:

- Charts page (/charts): Browse Harbor OCI registries to list Helm chart repositories
  and versions, with deploy modal to launch charts on selected clusters
- Monitoring page (/monitoring): Display cluster metrics (CPU/Memory/GPU usage)
  and per-node details with resource utilization bars
- Chart References page (/chart-references): CRUD for chart metadata references
- Values Templates page (/templates): CRUD for Helm values templates with version
  history and rollback support
- Sidebar: Add Charts navigation, update Storage and Templates links
- api.ts: Add all API client functions (clusterApi, registryApi, instanceApi,
  monitoringApi, storageApi, chartReferenceApi, valuesTemplateApi,
  workspaceApi, userApi) with full TypeScript types

Note: deploy flow and values template rollback not yet end-to-end tested.

backend/internal/domain/entity/instance.go

@@ -1,7 +1,9 @@
 package entity
 
 import (
+	"strings"
 	"time"
+	"unicode"
 )
 
 // InstanceStatus 实例状态
@@ -33,43 +35,65 @@ const (
 
 // Instance Helm 应用实例领域实体
 type Instance struct {
-	ID            string
-	ClusterID     string
-	Name          string // Helm Release Name
-	Namespace     string
-	RegistryID    string
-	Repository    string // OCI Repository (e.g., charts/app)
-	Chart         string // Chart Name
-	Version       string // Chart Version
-	Description   string
-	Values        map[string]interface{} // Helm Values (JSON)
-	ValuesYAML    string                 // Helm Values (YAML format)
-	Status        InstanceStatus
-	StatusReason  string
-	LastOperation InstanceOperation
-	LastError     string
-	Revision      int // Helm Release Revision
-	CreatedAt     time.Time
-	UpdatedAt     time.Time
+	ID                string
+	WorkspaceID       string // 所属 workspace
+	OwnerID           string // 创建者用户 ID
+	ClusterID         string
+	RegistryID        string
+	ChartReferenceID  string  // 引用的 Chart 引用
+	ValuesTemplateID  string  // 使用的 Values 模板
+
+	Name              string // Helm Release Name
+	Namespace         string
+	Repository        string // OCI Repository (e.g., charts/app)
+	Chart             string // Chart Name
+	Version           string // Chart Version
+	Description       string
+	Values            map[string]interface{} // Helm Values (JSON)
+	ValuesYAML        string                 // Helm Values (YAML format)
+	UserOverrideYAML  string                 // 用户额外覆盖的配置
+
+	Status            InstanceStatus
+	StatusReason      string
+	LastOperation     InstanceOperation
+	LastError         string
+	Revision          int // Helm Release Revision
+
+	// 资源使用统计（Helm 安装时从集群获取并更新）
+	CPURequested       float64 // CPU 请求量 (cores)
+	MemoryRequested    string   // 内存请求量 (e.g., "2Gi")
+	GPURequested       float64 // GPU 请求量 (cards)
+	GPUMemoryRequested string   // GPU 内存请求量 (e.g., "16Gi")
+
+	CreatedAt time.Time
+	UpdatedAt time.Time
 }
 
 // NewInstance 创建新实例
-func NewInstance(clusterID, name, namespace, registryID, repository, chart, version string) *Instance {
+func NewInstance(workspaceID, ownerID, clusterID, registryID, chartReferenceID, valuesTemplateID, name, namespace, repository, chart, version string) *Instance {
 	now := time.Now()
 	return &Instance{
-		ClusterID:     clusterID,
-		Name:          name,
-		Namespace:     namespace,
-		RegistryID:    registryID,
-		Repository:    repository,
-		Chart:         chart,
-		Version:       version,
-		Status:        StatusPending,
-		StatusReason:  "Pending install",
-		LastOperation: OperationInstall,
-		Revision:      1,
-		CreatedAt:     now,
-		UpdatedAt:     now,
+		WorkspaceID:      workspaceID,
+		OwnerID:          ownerID,
+		ClusterID:        clusterID,
+		RegistryID:       registryID,
+		ChartReferenceID: chartReferenceID,
+		ValuesTemplateID: valuesTemplateID,
+		Name:             name,
+		Namespace:        namespace,
+		Repository:       repository,
+		Chart:            chart,
+		Version:          version,
+		Status:           StatusPending,
+		StatusReason:     "Pending install",
+		LastOperation:    OperationInstall,
+		Revision:         1,
+		CPURequested:     0,
+		MemoryRequested:  "0Mi",
+		GPURequested:     0,
+		GPUMemoryRequested: "0Mi",
+		CreatedAt:        now,
+		UpdatedAt:        now,
 	}
 }
 
@@ -154,13 +178,43 @@ func (i *Instance) Upgrade(version string, values map[string]interface{}) {
 	i.BeginOperation(OperationUpgrade, "Pending upgrade")
 }
 
+// ValidateReleaseName 验证 Helm Release 名称是否符合 RFC 1123 DNS 子域名规范
+// Helm release 名称必须：
+// - 只能包含小写字母（a-z）、数字（0-9）和连字符（-）
+// - 不能以连字符开头或结尾
+// - 长度不超过 53 个字符
+func ValidateReleaseName(name string) error {
+	if name == "" {
+		return ErrInvalidInstanceName
+	}
+
+	// 检查长度（RFC 1123 DNS 子域名最大长度为 63，但 Helm 限制为 53）
+	if len(name) > 53 {
+		return ErrInvalidInstanceName
+	}
+
+	// 不能以连字符开头或结尾
+	if strings.HasPrefix(name, "-") || strings.HasSuffix(name, "-") {
+		return ErrInvalidInstanceName
+	}
+
+	// 只能包含小写字母、数字和连字符
+	for _, r := range name {
+		if !(unicode.IsLower(r) || unicode.IsDigit(r) || r == '-') {
+			return ErrInvalidInstanceName
+		}
+	}
+
+	return nil
+}
+
 // Validate 验证实例配置
 func (i *Instance) Validate() error {
 	if i.ClusterID == "" {
 		return ErrInvalidClusterID
 	}
-	if i.Name == "" {
-		return ErrInvalidInstanceName
+	if err := ValidateReleaseName(i.Name); err != nil {
+		return err
 	}
 	if i.Namespace == "" {
 		return ErrInvalidNamespace