refactor: full-stack restructure with multi-tenancy, workspace management, and K8s diagnostics

- Add Workspace domain (entity, repository, service, handler, DTO)
- Add multi-tenant K8s client with tenant binding and quota management
- Add K8s diagnostics client (instance diagnostics)
- Add authorization middleware (authz package)
- Restructure frontend to feature-based architecture (features/)
- Add User Management page in configuration
- Add AccessDenied page and route guards
- Refactor shared components (form inputs, layout, UI)
- Update Tailwind config for new design system
- Add comprehensive documentation (docs/, tasks/, plans)
- Improve cluster service with better kubeconfig handling
- Add tests for crypto, config, helm client, tenant binding

backend/internal/pkg/jwt/jwt.go

@@ -3,13 +3,13 @@ package jwt
 import (
 	"fmt"
 	"time"
-	
+
 	"github.com/golang-jwt/jwt/v5"
 )
 
 const (
-	AccessTokenDuration  = 24 * time.Hour      // Access Token 有效期
-	RefreshTokenDuration = 7 * 24 * time.Hour  // Refresh Token 有效期
+	AccessTokenDuration  = 24 * time.Hour     // Access Token 有效期
+	RefreshTokenDuration = 7 * 24 * time.Hour // Refresh Token 有效期
 )
 
 // JWTManager JWT 管理器
@@ -26,98 +26,133 @@ 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"`
+	TokenType   string `json:"token_type"`
 	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,
+		TokenType:   "access",
 		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,
+		TokenType:   "refresh",
 		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
+	claims, err := m.VerifyClaims(tokenString, "")
+	if err != nil {
+		return "", "", err
+	}
+	return claims.UserID, claims.Username, nil
+}
+
+func (m *JWTManager) VerifyAccess(tokenString string) (*Claims, error) {
+	return m.VerifyClaims(tokenString, "access")
+}
+
+func (m *JWTManager) VerifyRefresh(tokenString string) (*Claims, error) {
+	return m.VerifyClaims(tokenString, "refresh")
 }
 
-// VerifyWithIssuedAt 验证 Token 并返回签发时间
 func (m *JWTManager) VerifyWithIssuedAt(tokenString string) (userID, username string, issuedAt int64, err error) {
+	claims, err := m.VerifyClaims(tokenString, "access")
+	if err != nil {
+		return "", "", 0, err
+	}
+	return claims.UserID, claims.Username, claims.IssuedAt.Unix(), nil
+}
+
+func (m *JWTManager) VerifyClaims(tokenString, expectedType string) (*Claims, 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 nil, 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
+
+	claims, ok := token.Claims.(*Claims)
+	if !ok || !token.Valid {
+		return nil, fmt.Errorf("invalid token")
 	}
-	
-	return "", "", 0, fmt.Errorf("invalid token")
+	if expectedType != "" && claims.TokenType != expectedType {
+		return nil, fmt.Errorf("invalid token type")
+	}
+	if claims.IssuedAt == nil {
+		return nil, fmt.Errorf("token missing issued_at")
+	}
+	return claims, nil
 }
 
 // Refresh 刷新 Token
 func (m *JWTManager) Refresh(refreshToken string) (string, error) {
 	// 验证 Refresh Token
-	userID, username, err := m.Verify(refreshToken)
+	claims, err := m.VerifyRefresh(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:      claims.UserID,
+		Username:    claims.Username,
+		Role:        claims.Role,
+		WorkspaceID: claims.WorkspaceID,
+		TokenType:   "access",
 		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
 }
-