feat(risk-control): add content moderation audit

backend/internal/service/setting_service.go

@@ -456,6 +456,7 @@ func (s *SettingService) GetPublicSettings(ctx context.Context) (*PublicSettings
 		SettingKeyChannelMonitorDefaultIntervalSeconds,
 		SettingKeyAvailableChannelsEnabled,
 		SettingKeyAffiliateEnabled,
+		SettingKeyRiskControlEnabled,
 	}
 
 	settings, err := s.settingRepo.GetMultiple(ctx, keys)
@@ -545,6 +546,8 @@ func (s *SettingService) GetPublicSettings(ctx context.Context) (*PublicSettings
 		AvailableChannelsEnabled: settings[SettingKeyAvailableChannelsEnabled] == "true",
 
 		AffiliateEnabled: settings[SettingKeyAffiliateEnabled] == "true",
+
+		RiskControlEnabled: settings[SettingKeyRiskControlEnabled] == "true",
 	}, nil
 }
 
@@ -692,6 +695,7 @@ type PublicSettingsInjectionPayload struct {
 	ChannelMonitorDefaultIntervalSeconds int  `json:"channel_monitor_default_interval_seconds"`
 	AvailableChannelsEnabled             bool `json:"available_channels_enabled"`
 	AffiliateEnabled                     bool `json:"affiliate_enabled"`
+	RiskControlEnabled                   bool `json:"risk_control_enabled"`
 }
 
 // GetPublicSettingsForInjection returns public settings in a format suitable for HTML injection.
@@ -745,6 +749,7 @@ func (s *SettingService) GetPublicSettingsForInjection(ctx context.Context) (any
 		ChannelMonitorDefaultIntervalSeconds: settings.ChannelMonitorDefaultIntervalSeconds,
 		AvailableChannelsEnabled:             settings.AvailableChannelsEnabled,
 		AffiliateEnabled:                     settings.AffiliateEnabled,
+		RiskControlEnabled:                   settings.RiskControlEnabled,
 	}, nil
 }
 
@@ -1232,6 +1237,9 @@ func (s *SettingService) buildSystemSettingsUpdates(ctx context.Context, setting
 	// Affiliate (邀请返利) feature switch
 	updates[SettingKeyAffiliateEnabled] = strconv.FormatBool(settings.AffiliateEnabled)
 
+	// 风控中心功能开关
+	updates[SettingKeyRiskControlEnabled] = strconv.FormatBool(settings.RiskControlEnabled)
+
 	// Claude Code version check
 	updates[SettingKeyMinClaudeCodeVersion] = settings.MinClaudeCodeVersion
 	updates[SettingKeyMaxClaudeCodeVersion] = settings.MaxClaudeCodeVersion
@@ -1903,6 +1911,9 @@ func (s *SettingService) InitializeDefaultSettings(ctx context.Context) error {
 		// Affiliate (邀请返利) feature (default disabled; opt-in)
 		SettingKeyAffiliateEnabled: "false",
 
+		// 风控中心功能（默认关闭，显式启用）
+		SettingKeyRiskControlEnabled: "false",
+
 		// Claude Code version check (default: empty = disabled)
 		SettingKeyMinClaudeCodeVersion: "",
 		SettingKeyMaxClaudeCodeVersion: "",
@@ -2242,6 +2253,9 @@ func (s *SettingService) parseSettings(settings map[string]string) *SystemSettin
 	// Affiliate (邀请返利) feature (default: disabled; strict true)
 	result.AffiliateEnabled = settings[SettingKeyAffiliateEnabled] == "true"
 
+	// 风控中心功能（默认关闭，严格 true 才启用）
+	result.RiskControlEnabled = settings[SettingKeyRiskControlEnabled] == "true"
+
 	// Claude Code version check
 	result.MinClaudeCodeVersion = settings[SettingKeyMinClaudeCodeVersion]
 	result.MaxClaudeCodeVersion = settings[SettingKeyMaxClaudeCodeVersion]