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/etc/platform.docker.yaml

@@ -19,6 +19,13 @@ Auth:
   PhoneLoginOnly: false
   RequirePhoneBound: false
 
+SMS:
+  Provider: off
+  CodeTTLSeconds: 300
+  ResendSeconds: 60
+  # 试运行关绑定短信；正式接短信后 Provider=dev|真实厂商 且 RequireForBind=true
+  RequireForBind: false
+
 License:
   Enabled: false
   Customer: ""
@@ -32,6 +39,12 @@ License:
 Agent:
   CapsuleSecret: "dev-agent-capsule-secret"
   RegisterSecret: "dev-only-change-me"
+  YuhengTicket:
+    Enabled: true
+    Secret: "dev-yuheng-ticket-secret-change-me"
+    Issuer: yuheng
+    Audience: aijianzhan
+    MaxAgeSec: 120
 
 Storage:
   Driver: local