feat(sidebar): move Routing/Outbounds to top-level items with clean URLs

- Move Routing out of the Xray Configs submenu; add Routing and Outbounds
  as top-level sidebar items below Hosts
- Give them their own clean routes (/routing, /outbound) instead of
  /xray#routing and /xray#outbound, registered in the React router and the
  Go SPA shell so direct links and refresh work
- XrayPage derives the active section from the pathname for those routes
- Add menu.routing and menu.outbounds translation keys across all locales

internal/web/controller/spa.go

@@ -40,6 +40,8 @@ func (a *XUIController) initRouter(g *gin.RouterGroup) {
 	g.GET("/nodes", a.panelSPA)
 	g.GET("/settings", a.panelSPA)
 	g.GET("/xray", a.panelSPA)
+	g.GET("/outbound", a.panelSPA)
+	g.GET("/routing", a.panelSPA)
 	g.GET("/api-docs", a.panelSPA)
 
 	// SPA pages built by Vite don't have a server-rendered <meta name="csrf-token">,