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.

frontend/src/hooks/useClients.ts

@@ -304,7 +304,6 @@ export function useClients(options: UseClientsOptions = {}) {
     return Promise.all([
       queryClient.invalidateQueries({ queryKey: keys.clients.root() }),
       queryClient.invalidateQueries({ queryKey: keys.inbounds.root() }),
-      queryClient.invalidateQueries({ queryKey: keys.xray.config() }),
     ]);
   }, [queryClient]);