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/pkg/jwt/jwt.go

@@ -26,98 +26,106 @@ func NewJWTManager(secretKey string) *JWTManager {
 
 // Claims JWT Claims
 type Claims struct {
-	UserID   string `json:"user_id"`
-	Username string `json:"username"`
+	UserID      string `json:"user_id"`
+	Username    string `json:"username"`
+	Role        string `json:"role"`
+	WorkspaceID string `json:"workspace_id"`
 	jwt.RegisteredClaims
 }
 
 // Generate 生成 Access Token 和 Refresh Token
-func (m *JWTManager) Generate(userID, username string) (accessToken, refreshToken string, err error) {
+func (m *JWTManager) Generate(userID, username, role, workspaceID string) (accessToken, refreshToken string, err error) {
 	// 生成 Access Token
 	accessClaims := &Claims{
-		UserID:   userID,
-		Username: username,
+		UserID:      userID,
+		Username:    username,
+		Role:        role,
+		WorkspaceID: workspaceID,
 		RegisteredClaims: jwt.RegisteredClaims{
 			ExpiresAt: jwt.NewNumericDate(time.Now().Add(AccessTokenDuration)),
 			IssuedAt:  jwt.NewNumericDate(time.Now()),
 		},
 	}
-	
+
 	accessTokenObj := jwt.NewWithClaims(jwt.SigningMethodHS256, accessClaims)
 	accessToken, err = accessTokenObj.SignedString([]byte(m.secretKey))
 	if err != nil {
 		return "", "", fmt.Errorf("failed to sign access token: %w", err)
 	}
-	
+
 	// 生成 Refresh Token
 	refreshClaims := &Claims{
-		UserID:   userID,
-		Username: username,
+		UserID:      userID,
+		Username:    username,
+		Role:        role,
+		WorkspaceID: workspaceID,
 		RegisteredClaims: jwt.RegisteredClaims{
 			ExpiresAt: jwt.NewNumericDate(time.Now().Add(RefreshTokenDuration)),
 			IssuedAt:  jwt.NewNumericDate(time.Now()),
 		},
 	}
-	
+
 	refreshTokenObj := jwt.NewWithClaims(jwt.SigningMethodHS256, refreshClaims)
 	refreshToken, err = refreshTokenObj.SignedString([]byte(m.secretKey))
 	if err != nil {
 		return "", "", fmt.Errorf("failed to sign refresh token: %w", err)
 	}
-	
+
 	return accessToken, refreshToken, nil
 }
 
 // Verify 验证 Token
-func (m *JWTManager) Verify(tokenString string) (userID, username string, err error) {
-	userID, username, _, err = m.VerifyWithIssuedAt(tokenString)
-	return userID, username, err
+func (m *JWTManager) Verify(tokenString string) (userID, username, role, workspaceID string, err error) {
+	userID, username, role, workspaceID, _, err = m.VerifyWithIssuedAt(tokenString)
+	return userID, username, role, workspaceID, err
 }
 
 // VerifyWithIssuedAt 验证 Token 并返回签发时间
-func (m *JWTManager) VerifyWithIssuedAt(tokenString string) (userID, username string, issuedAt int64, err error) {
+func (m *JWTManager) VerifyWithIssuedAt(tokenString string) (userID, username, role, workspaceID string, issuedAt int64, err error) {
 	token, err := jwt.ParseWithClaims(tokenString, &Claims{}, func(token *jwt.Token) (interface{}, error) {
 		if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
 			return nil, fmt.Errorf("unexpected signing method: %v", token.Header["alg"])
 		}
 		return []byte(m.secretKey), nil
 	})
-	
+
 	if err != nil {
-		return "", "", 0, fmt.Errorf("failed to parse token: %w", err)
+		return "", "", "", "", 0, fmt.Errorf("failed to parse token: %w", err)
 	}
-	
+
 	if claims, ok := token.Claims.(*Claims); ok && token.Valid {
-		return claims.UserID, claims.Username, claims.IssuedAt.Unix(), nil
+		return claims.UserID, claims.Username, claims.Role, claims.WorkspaceID, claims.IssuedAt.Unix(), nil
 	}
-	
-	return "", "", 0, fmt.Errorf("invalid token")
+
+	return "", "", "", "", 0, fmt.Errorf("invalid token")
 }
 
 // Refresh 刷新 Token
 func (m *JWTManager) Refresh(refreshToken string) (string, error) {
 	// 验证 Refresh Token
-	userID, username, err := m.Verify(refreshToken)
+	userID, username, role, workspaceID, err := m.Verify(refreshToken)
 	if err != nil {
 		return "", fmt.Errorf("invalid refresh token: %w", err)
 	}
-	
+
 	// 生成新的 Access Token
 	accessClaims := &Claims{
-		UserID:   userID,
-		Username: username,
+		UserID:      userID,
+		Username:    username,
+		Role:        role,
+		WorkspaceID: workspaceID,
 		RegisteredClaims: jwt.RegisteredClaims{
 			ExpiresAt: jwt.NewNumericDate(time.Now().Add(AccessTokenDuration)),
 			IssuedAt:  jwt.NewNumericDate(time.Now()),
 		},
 	}
-	
+
 	accessTokenObj := jwt.NewWithClaims(jwt.SigningMethodHS256, accessClaims)
 	newAccessToken, err := accessTokenObj.SignedString([]byte(m.secretKey))
 	if err != nil {
 		return "", fmt.Errorf("failed to sign new access token: %w", err)
 	}
-	
+
 	return newAccessToken, nil
 }