refactor(session): route construction through Session.create

packages/ui/permission/tests/permission.spec.ts

@@ -44,7 +44,7 @@ async function mounted(options: {
 }
 
 function freshSession(id: string): Session {
-  return new Session(SessionId(id))
+  return Session.create(SessionId(id))
 }
 
 async function mountedStore(options: { approvalDefault?: ApprovalPolicy | undefined } = {}): Promise<Context> {

packages/ui/user-approval/tests/approval.spec.ts

@@ -355,7 +355,7 @@ describe('approval policy (the approval/policy fold)', () => {
 
   /** Agent stand-in over a real Session; the opened turn satisfies request()'s enclosure precondition. */
   function sessionAgent(id: string): { agent: Agent; session: Session } {
-    const session = new Session(SessionId(id))
+    const session = Session.create(SessionId(id))
     session.append('turn/start', { turn: 1, trigger: { kind: 'message', source: { kind: 'user' } } })
     const agent = {
       id,

packages/ui/user-approval/tests/invariant.spec.ts

@@ -43,7 +43,7 @@ describe('approval invariants', () => {
 
   it('adopts a bare session first observed through publication', async () => {
     const ctx = await setup()
-    const session = new Session(SessionId('bare-approval-session'))
+    const session = Session.create(SessionId('bare-approval-session'))
     const id = ApprovalRequestId('bare-ask')
     const asked = {
       type: 'approval/asked', seq: 0, time: 0, data: { id, toolName: 'bash' },