🎨 Fix https://github.com/siyuan-note/siyuan/issues/17078

Signed-off-by: Daniel <845765@qq.com>

kernel/model/conf.go

@@ -1008,8 +1008,6 @@ func IsSubscriber() bool {
 }
 
 func IsPaidUser() bool {
-	// S3/WebDAV data sync and backup are available for a fee https://github.com/siyuan-note/siyuan/issues/8780
-
 	if IsSubscriber() {
 		return true
 	}

kernel/model/sync.go

@@ -250,10 +250,14 @@ func checkSync(boot, exit, byHand bool) bool {
 	switch Conf.Sync.Provider {
 	case conf.ProviderSiYuan:
 		if !IsSubscriber() {
+			Conf.Sync.Enabled = false
+			Conf.Save()
 			return false
 		}
 	case conf.ProviderWebDAV, conf.ProviderS3, conf.ProviderLocal:
 		if !IsPaidUser() {
+			Conf.Sync.Enabled = false
+			Conf.Save()
 			return false
 		}
 	}