diff --git a/app/src/config/bazaar.ts b/app/src/config/bazaar.ts
index 7a3ff4121..d85bcfd6e 100644
--- a/app/src/config/bazaar.ts
+++ b/app/src/config/bazaar.ts
@@ -246,11 +246,11 @@ export const bazaar = {
         let themeMode = "";
         if (bazaarType === "themes") {
             const themeValue = (bazaar.element.querySelector("#bazaarSelect") as HTMLSelectElement).value;
-            if ((themeValue === "0" && item.modes.includes("dark")) ||
-                themeValue === "1" && item.modes.includes("light")) {
+            if ((themeValue === "0" && item.modes?.includes("dark")) ||
+                themeValue === "1" && item.modes?.includes("light")) {
                 hide = true;
             }
-            themeMode = item.modes.toString();
+            themeMode = item.modes?.toString() || "";
         }
         let showSwitch = false;
         if (["icons", "themes"].includes(bazaarType)) {
diff --git a/kernel/bazaar/readme.go b/kernel/bazaar/readme.go
index e69821d00..1a1bc036f 100644
--- a/kernel/bazaar/readme.go
+++ b/kernel/bazaar/readme.go
@@ -142,7 +142,7 @@ func addClassToKramdownIAL(ial [][]string, class string) [][]string {
 		if len(attr) < 2 || attr[0] != "class" {
 			continue
 		}
-		for _, item := range strings.Fields(attr[1]) {
+		for item := range strings.FieldsSeq(attr[1]) {
 			if item == class {
 				return ial
 			}
diff --git a/kernel/bazaar/stage.go b/kernel/bazaar/stage.go
index 0477dcbbe..be09e6518 100644
--- a/kernel/bazaar/stage.go
+++ b/kernel/bazaar/stage.go
@@ -40,6 +40,7 @@ type StageBazaarResult struct {
 }
 
 var stageBazaarFlight singleflight.Group
+var onlineCheckFlight singleflight.Group
 var bazaarStatsFlight singleflight.Group
 
 // getStageAndBazaar 获取 stage 索引和 bazaar 索引，相同 pkgType 的并发调用会合并为一次实际请求 (single-flight)
@@ -112,6 +113,25 @@ func getStageAndBazaar0(pkgType string) (result StageBazaarResult) {
 	}
 }
 
+func isBazaarOnline() bool {
+	v, err, _ := onlineCheckFlight.Do("bazaarOnline", func() (interface{}, error) {
+		return isBazaarOnline0(), nil
+	})
+	if err != nil {
+		return false
+	}
+	return v.(bool)
+}
+
+func isBazaarOnline0() (ret bool) {
+	// Improve marketplace loading when offline https://github.com/siyuan-note/siyuan/issues/12050
+	ret = util.IsOnline(util.BazaarOSSServer+"/204", true, 3000)
+	if !ret {
+		util.PushErrMsg(util.Langs[util.Lang][24], 5000)
+	}
+	return
+}
+
 // getStageIndexFromCache 仅从缓存获取 stage 索引，过期或无缓存时返回 nil
 func getStageIndexFromCache(pkgType string) (ret *StageIndex, err error) {
 	if val, found := cachedStageIndex.Get(pkgType); found {
@@ -169,15 +189,6 @@ func getStageRepoByURL(ctx context.Context, pkgType, url string) *StageRepo {
 	return stageIndex.reposByURL[url]
 }
 
-func isBazaarOnline() (ret bool) {
-	// Improve marketplace loading when offline https://github.com/siyuan-note/siyuan/issues/12050
-	ret = util.IsOnline(util.BazaarOSSServer+"/204", true, 3000)
-	if !ret {
-		util.PushErrMsg(util.Langs[util.Lang][24], 5000)
-	}
-	return
-}
-
 // bazaarStats 集市包统计信息
 type bazaarStats struct {
 	Downloads int `json:"downloads"` // 下载次数
diff --git a/kernel/model/assets.go b/kernel/model/assets.go
index bcbc9413a..756a1542c 100644
--- a/kernel/model/assets.go
+++ b/kernel/model/assets.go
@@ -89,6 +89,7 @@ func HandleAssetsRemoveEvent(assetAbsPath string) {
 	if gulu.File.IsDir(assetAbsPath) {
 		return
 	}
+	// 跳过隐藏文件，如 WPS 的临时文件、Mac 的 .DS_Store
 	if filelock.IsHidden(assetAbsPath) {
 		return
 	}
diff --git a/kernel/model/assets_watcher_darwin.go b/kernel/model/assets_watcher_darwin.go
index 8d355af35..dfc9653e8 100644
--- a/kernel/model/assets_watcher_darwin.go
+++ b/kernel/model/assets_watcher_darwin.go
@@ -65,7 +65,6 @@ func watchAssets() {
 					return
 				}
 
-				//logging.LogInfof("assets changed: %s", event)
 				if watcher.Write == event.Op {
 					IncSync()
 				}
@@ -88,6 +87,7 @@ func watchAssets() {
 			}
 		}
 	}()
+
 	if err := assetsWatcher.Start(10 * time.Second); err != nil {
 		logging.LogErrorf("start assets watcher for folder [%s] failed: %s", assetsDir, err)
 		return
diff --git a/kernel/model/bazaar.go b/kernel/model/bazaar.go
index 376def7fd..61c7e3233 100644
--- a/kernel/model/bazaar.go
+++ b/kernel/model/bazaar.go
@@ -322,6 +322,7 @@ func GetBazaarPackageREADME(ctx context.Context, repoURL, repoHash, pkgType stri
 	return
 }
 
+// InstallBazaarPackage 安装集市包，themeMode 仅在 pkgType 为 "themes" 时生效
 func InstallBazaarPackage(pkgType, repoURL, repoHash, packageName string, themeMode int) error {
 	installPath, jsonFileName, err := getPackageInstallPath(pkgType, packageName)
 	if err != nil {
diff --git a/kernel/model/conf.go b/kernel/model/conf.go
index c82de59a6..699222f44 100644
--- a/kernel/model/conf.go
+++ b/kernel/model/conf.go
@@ -337,10 +337,11 @@ func InitConf() {
 			Conf.OpenHelp = true
 		}
 	} else {
-		if 0 < semver.Compare("v"+util.Ver, "v"+Conf.System.KernelVersion) {
+		cmp := semver.Compare("v"+util.Ver, "v"+Conf.System.KernelVersion)
+		if 0 < cmp {
 			logging.LogInfof("upgraded from version [%s] to [%s]", Conf.System.KernelVersion, util.Ver)
 			Conf.ShowChangelog = true
-		} else if 0 > semver.Compare("v"+util.Ver, "v"+Conf.System.KernelVersion) {
+		} else if 0 > cmp {
 			logging.LogInfof("downgraded from version [%s] to [%s]", Conf.System.KernelVersion, util.Ver)
 		}
 
@@ -1033,9 +1034,12 @@ const (
 	MaskedAccessAuthCode = "*******"
 )
 
+// GetMaskedConf 获取脱敏后的 Conf
 func GetMaskedConf() (ret *AppConf, err error) {
-	// 脱敏处理
-	data, err := gulu.JSON.MarshalIndentJSON(Conf, "", "  ")
+	// 序列化时持锁，避免与 loadThemes/LoadIcons 等写操作并发导致 slice 在编码过程中被改写而 panic https://github.com/siyuan-note/siyuan/issues/16978
+	Conf.m.Lock()
+	data, err := gulu.JSON.MarshalJSON(Conf)
+	Conf.m.Unlock()
 	if err != nil {
 		logging.LogErrorf("marshal conf failed: %s", err)
 		return
diff --git a/kernel/model/emojis_watcher_darwin.go b/kernel/model/emojis_watcher_darwin.go
index 419180dfe..494376112 100644
--- a/kernel/model/emojis_watcher_darwin.go
+++ b/kernel/model/emojis_watcher_darwin.go
@@ -40,9 +40,9 @@ func WatchEmojis() {
 }
 
 func watchEmojis() {
+	CloseWatchEmojis()
 	emojisDir := filepath.Join(util.DataDir, "emojis")
 
-	CloseWatchEmojis()
 	emojisWatcher = watcher.New()
 
 	if !gulu.File.IsDir(emojisDir) {
@@ -74,6 +74,7 @@ func watchEmojis() {
 			}
 		}
 	}()
+
 	if err := emojisWatcher.Start(10 * time.Second); err != nil {
 		logging.LogErrorf("start emojis watcher for folder [%s] failed: %s", emojisDir, err)
 		return
diff --git a/kernel/model/repository.go b/kernel/model/repository.go
index 52d2c624d..b348f8d12 100644
--- a/kernel/model/repository.go
+++ b/kernel/model/repository.go
@@ -749,6 +749,10 @@ func checkoutRepo(id string) {
 	CloseWatchEmojis()
 	defer WatchEmojis()
 
+	// 若主题支持同步，需关闭监听器
+	// CloseWatchThemes()
+	// defer WatchThemes()
+
 	// 恢复快照时自动暂停同步，避免刚刚恢复后的数据又被同步覆盖
 	syncEnabled := Conf.Sync.Enabled
 	Conf.Sync.Enabled = false