feat: add Yuheng ticket bind, trial SMS off, shared bindings

Ship ticket-exchange and bind/policy for Z13, keep trial binds SMS-free, allow shared company bindings, and align SyncPage plus sync docs.

Co-authored-by: Cursor <cursoragent@cursor.com>

platform/internal/svc/servicecontext.go

@@ -26,6 +26,7 @@ import (
 	"aijianzhan/platform/internal/storage"
 	"aijianzhan/platform/internal/tenantperm"
 	"aijianzhan/platform/internal/userstore"
+	"aijianzhan/platform/internal/yuhticket"
 
 	_ "github.com/lib/pq"
 )
@@ -49,6 +50,7 @@ type ServiceContext struct {
 	JWT        authx.JWTConfig
 	DBSync     *dbsync.Manager
 	BindCodes  bindcodestore.Store
+	YuhengJTI  *yuhticket.JTIStore
 	TenantPerm tenantperm.Store
 	SMS        *smsstore.Store
 	License    *license.Manager
@@ -189,6 +191,11 @@ func NewServiceContext(c config.Config) *ServiceContext {
 			} else {
 				ctx.BindCodes = bc
 			}
+			if jti, err := yuhticket.NewJTIStore(dir); err != nil {
+				log.Printf("yuheng ticket jti: %v", err)
+			} else {
+				ctx.YuhengJTI = jti
+			}
 		}
 	}