diff --git a/internal/logic/common/settings_registry.go b/internal/logic/common/settings_registry.go
index 8aa471e..45eec16 100644
--- a/internal/logic/common/settings_registry.go
+++ b/internal/logic/common/settings_registry.go
@@ -66,7 +66,7 @@ var Registry = []SettingDef{
 	{Key: "register_global_limit_per_minute", Type: SettingTypeInt, Default: "10", Category: "general",
 		Label: "全局每分钟注册限制", Description: "全系统每分钟最多注册次数（0表示不限制）", Validation: "min:0,max:100"},
 	{Key: "maintenance_mode", Type: SettingTypeBool, Default: "false", Category: "general",
-		Label: "维护模式", Description: "开启后控制台显示维护提示"},
+		Label: "维护模式", Description: "开启后控制台显示维护提示", IsPublic: true},
 	{Key: "maintenance_message", Type: SettingTypeString, Default: "", Category: "general",
 		Label: "维护提示信息", Description: "维护模式下显示的提示文字", IsPublic: true},
 	{Key: "maintenance_duration", Type: SettingTypeString, Default: "", Category: "general",
diff --git a/migrations/000009_sync_options_is_public.sql b/migrations/000009_v0_1_11_version.sql
similarity index 60%
rename from migrations/000009_sync_options_is_public.sql
rename to migrations/000009_v0_1_11_version.sql
index 5d93dcb..ccaad86 100644
--- a/migrations/000009_sync_options_is_public.sql
+++ b/migrations/000009_v0_1_11_version.sql
@@ -3,6 +3,14 @@
 -- Settings like turnstile_enabled/turnstile_site_key were marked IsPublic in the
 -- registry but the DB rows still had is_public=false, causing GetPublicOptions
 -- (WHERE is_public=true) to skip them and return stale defaults to the tenant frontend.
+--
+-- 变更记录：
+--   2026-06-13 追加 'maintenance_mode'。租户前端 MaintenanceBanner.vue 的
+--     `v-if="settings.maintenance_mode"` 依赖公开配置返回维护模式开关，但
+--     registry 此前未标 IsPublic、DB 行也未置 public，导致维护横幅即使管理员
+--     开启维护模式也永不显示。已在 settings_registry.go 同步标记 IsPublic=true。
+--     若该行在 DB 中尚不存在（管理员从未保存过维护配置），公开接口会通过
+--     registry 默认值（false）兜底返回，不影响功能。
 
 UPDATE sys_options SET is_public = true, updated_at = NOW()
 WHERE key IN (
@@ -10,6 +18,7 @@ WHERE key IN (
     'site_description',
     'register_enabled',
     'register_email_verification',
+    'maintenance_mode',
     'maintenance_message',
     'maintenance_duration',
     'api_maintenance_enabled',