ITEM6 B4: frontend reshaping — xray page retired, stats switches to settings, template read paths closed

- Delete the xray settings page (routes/menu/title), geodata UI/service,
  XraySettingController/Service and routing-sync write paths; the stored
  xrayTemplateConfig row loses its last readers (GetXrayConfigTemplate now
  returns the embedded factory template; B1 already deleted the row).
- Settings GeneralTab gains the four trafficStatsSwitches switches
  (settings.trafficStatsSwitches, B1) with the dual warning copy; entity
  AllSetting carries the key end to end (TestTrafficStatsSwitchesPlumbing).
- Tag-directory consumers (panelOutbound, mtproto egress, node/host
  outbound pickers) move from POST /xray/ to GET /server/outboundDirectory.
- Shared Mux/Sockopt forms and balancer helpers relocated to lib/xray;
  converter preserves sniffing ips/domains exclusions into the panel
  sidecar instead of dropping them (B2 gap closed by retention).
- Freedom final-rules DB fix seeders retired; getDefaultJsonConfig
  endpoint removed (no in-repo consumer); locales pruned to referenced
  keys (pages.xray 331 -> 68) plus the five new settings keys.

internal/web/service/inbound.go

@@ -1397,13 +1397,6 @@ func (s *InboundService) DelInbound(id int) (bool, error) {
 	if postCommitApply != nil {
 		postCommitApply()
 	}
-	if loadErr == nil && ib.Tag != "" {
-		if routingChanged, syncErr := (&XraySettingService{}).RemoveInboundTagReferences(ib.Tag); syncErr != nil {
-			logger.Warning("DelInbound: sync routing on inbound delete failed:", syncErr)
-		} else if routingChanged {
-			needRestart = true
-		}
-	}
 	if !database.IsPostgres() {
 		var count int64
 		if err := db.Model(&model.Inbound{}).Count(&count).Error; err != nil {
@@ -1974,17 +1967,6 @@ func (s *InboundService) UpdateInbound(inbound *model.Inbound) (*model.Inbound,
 	if postCommitApply != nil {
 		postCommitApply()
 	}
-	// After the rename is committed, point any routing rules / loopback outbounds
-	// in xrayTemplateConfig at the new tag (oldInbound.Tag now holds the resolved
-	// new tag; tag holds the pre-edit one). Done post-commit so a sync failure
-	// can't roll back the inbound edit.
-	if tag != oldInbound.Tag {
-		if routingChanged, syncErr := (&XraySettingService{}).PropagateInboundTagRename(tag, oldInbound.Tag); syncErr != nil {
-			logger.Warning("UpdateInbound: sync routing on tag rename failed:", syncErr)
-		} else if routingChanged {
-			needRestart = true
-		}
-	}
 	return inbound, needRestart, nil
 }