v0.249.0: i18n slice 1 release B — backup pages in English, Hungarian byte-identical (R-556)

Seven backup pages + the restore-progress JS converted against fixtures captured unconverted
(f8ebc47); recovery renders through executeTemplateLang; English retrieval claims registered;
the Fut comparison left unconverted (R-563).

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0159rPz1ZhFKsS53msqPYxtS

controller/internal/web/escrow_handlers.go

@@ -120,6 +120,7 @@ func (s *Server) escrowWizardPageHandler(w http.ResponseWriter, r *http.Request)
 	}
 	data := map[string]interface{}{
 		"Title":            "Helyreállítási kód",
+		"TitleKey":         "page.title.escrow", // i18n: the Hungarian title above is what hu renders
 		"CustomerName":     s.cfg.Customer.Name,
 		"Domain":           s.cfg.Customer.Domain,
 		"ActivePage":       "backups-remote",