fix(lint): resolve data management staticcheck warnings

backend/internal/handler/admin/data_management_handler.go

 package admin
 
 import (
+	"context"
 	"strconv"
 	"strings"
 
@@ -13,13 +14,34 @@ import (
 )
 
 type DataManagementHandler struct {
-	dataManagementService *service.DataManagementService
+	dataManagementService dataManagementService
 }
 
 func NewDataManagementHandler(dataManagementService *service.DataManagementService) *DataManagementHandler {
 	return &DataManagementHandler{dataManagementService: dataManagementService}
 }
 
+type dataManagementService interface {
+	GetConfig(ctx context.Context) (service.DataManagementConfig, error)
+	UpdateConfig(ctx context.Context, cfg service.DataManagementConfig) (service.DataManagementConfig, error)
+	ValidateS3(ctx context.Context, cfg service.DataManagementS3Config) (service.DataManagementTestS3Result, error)
+	CreateBackupJob(ctx context.Context, input service.DataManagementCreateBackupJobInput) (service.DataManagementBackupJob, error)
+	ListSourceProfiles(ctx context.Context, sourceType string) ([]service.DataManagementSourceProfile, error)
+	CreateSourceProfile(ctx context.Context, input service.DataManagementCreateSourceProfileInput) (service.DataManagementSourceProfile, error)
+	UpdateSourceProfile(ctx context.Context, input service.DataManagementUpdateSourceProfileInput) (service.DataManagementSourceProfile, error)
+	DeleteSourceProfile(ctx context.Context, sourceType, profileID string) error
+	SetActiveSourceProfile(ctx context.Context, sourceType, profileID string) (service.DataManagementSourceProfile, error)
+	ListS3Profiles(ctx context.Context) ([]service.DataManagementS3Profile, error)
+	CreateS3Profile(ctx context.Context, input service.DataManagementCreateS3ProfileInput) (service.DataManagementS3Profile, error)
+	UpdateS3Profile(ctx context.Context, input service.DataManagementUpdateS3ProfileInput) (service.DataManagementS3Profile, error)
+	DeleteS3Profile(ctx context.Context, profileID string) error
+	SetActiveS3Profile(ctx context.Context, profileID string) (service.DataManagementS3Profile, error)
+	ListBackupJobs(ctx context.Context, input service.DataManagementListBackupJobsInput) (service.DataManagementListBackupJobsResult, error)
+	GetBackupJob(ctx context.Context, jobID string) (service.DataManagementBackupJob, error)
+	EnsureAgentEnabled(ctx context.Context) error
+	GetAgentHealth(ctx context.Context) service.DataManagementAgentHealth
+}
+
 type TestS3ConnectionRequest struct {
 	Endpoint        string `json:"endpoint"`
 	Region          string `json:"region" binding:"required"`

backend/internal/service/data_management_service.go

@@ -55,8 +55,7 @@ type DataManagementAgentInfo struct {
 }
 
 type DataManagementService struct {
-	socketPath  string
-	dialTimeout time.Duration
+	socketPath string
 }
 
 func NewDataManagementService() *DataManagementService {
@@ -64,16 +63,13 @@ func NewDataManagementService() *DataManagementService {
 }
 
 func NewDataManagementServiceWithOptions(socketPath string, dialTimeout time.Duration) *DataManagementService {
+	_ = dialTimeout
 	path := strings.TrimSpace(socketPath)
 	if path == "" {
 		path = DefaultDataManagementAgentSocketPath
 	}
-	if dialTimeout <= 0 {
-		dialTimeout = 500 * time.Millisecond
-	}
 	return &DataManagementService{
-		socketPath:  path,
-		dialTimeout: dialTimeout,
+		socketPath: path,
 	}
 }