P9(4): remove local-core live-test trio — outbound speed test + egress probe, restart/stop xray endpoints

Per user decision 2026-10-21 (reverses the earlier keep call in
PANEL-LITE-SPEC.md, now amended): the lite panel never runs a local
core, so measuring/probing from the panel host is meaningless.

Backend:
- delete service/outbound probe implementation (probe_http.go and its
  tests) and the TestOutbound/TestOutbounds batch prober; outbound
  traffic accounting (AddTraffic/GetOutboundsTraffic/Reset) unchanged
- drop POST /panel/api/xray/testOutbound + testOutbounds routes and the
  outboundTestUrl setting (get/update plumbing removed; stored rows in
  existing DBs are inert)
- drop POST /panel/api/server/restartXrayService + stopXrayService
  routes/handlers and the node-sync allowlist entry; the service-level
  Stop/RestartXrayService stay for internal import/restore flows
- node-sync allowlist contract test updated to the new inventory

Frontend:
- remove test buttons/mode switch/test-all from outbounds tab, card
  list and table columns; delete TestResultPopover and CountryPill;
  drop the egress/country/latency columns fed by probe results
- remove outboundTestUrl state and save plumbing from useXraySetting
  and the Basics tab field; drop OutboundTestResult schemas
- delete the 15 now-dead i18n keys from all 13 locales (incl. the
  restart/stop keys orphaned since P6/P7 — i18n-dead-keys test green)
- tests: drop the test-URL hook test, re-probe the loopback index
  mapping through Move-to-top, regenerate API types (gen)

internal/web/controller/server.go

@@ -56,8 +56,6 @@ func (a *ServerController) initRouter(g *gin.RouterGroup) {
 	g.GET("/clientIps", a.getClientIps)
 	g.GET("/fail2banStatus", a.getFail2banStatus)
 
-	g.POST("/stopXrayService", a.stopXrayService)
-	g.POST("/restartXrayService", a.restartXrayService)
 	g.POST("/updatePanel", a.updatePanel)
 	g.POST("/setUpdateChannel", a.setUpdateChannel)
 	g.POST("/importDB", a.importDB)
@@ -165,40 +163,6 @@ func (a *ServerController) setUpdateChannel(c *gin.Context) {
 	jsonMsg(c, I18nWeb(c, "pages.index.updateChannelChanged"), err)
 }
 
-// stopXrayService stops the Xray service.
-func (a *ServerController) stopXrayService(c *gin.Context) {
-	err := a.serverService.StopXrayService()
-	if err != nil {
-		jsonMsg(c, I18nWeb(c, "pages.xray.stopError"), err)
-		websocket.BroadcastXrayState("error", err.Error())
-		return
-	}
-	jsonMsg(c, I18nWeb(c, "pages.xray.stopSuccess"), err)
-	websocket.BroadcastXrayState("stop", "")
-	websocket.BroadcastNotification(
-		I18nWeb(c, "pages.xray.stopSuccess"),
-		"Xray service has been stopped",
-		"warning",
-	)
-}
-
-// restartXrayService restarts the Xray service.
-func (a *ServerController) restartXrayService(c *gin.Context) {
-	err := a.serverService.RestartXrayService()
-	if err != nil {
-		jsonMsg(c, I18nWeb(c, "pages.xray.restartError"), err)
-		websocket.BroadcastXrayState("error", err.Error())
-		return
-	}
-	jsonMsg(c, I18nWeb(c, "pages.xray.restartSuccess"), err)
-	websocket.BroadcastXrayState("running", "")
-	websocket.BroadcastNotification(
-		I18nWeb(c, "pages.xray.restartSuccess"),
-		"Xray service has been restarted successfully",
-		"success",
-	)
-}
-
 // getConfigJson retrieves the Xray configuration as JSON.
 func (a *ServerController) getConfigJson(c *gin.Context) {
 	configJson, err := a.serverService.GetConfigJson()