fix(web): expose Codex Fast and Plan on Create Session (#1017)

* fix(web): expose Codex Fast and Plan on Create Session

Wire serviceTier and collaborationMode through spawn so Create can set
the same Codex options chat Settings already supports (#1015).

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

* fix(cli): forward collaborationMode through machine spawn RPC

Create Session Plan was accepted by the hub but dropped in apiMachine
before buildCliArgs; also preserve collaborationMode on resume spawn.

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

* fix(cli): correct stopSession mock type in spawn RPC test

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

* fix(web): keep Fast mode across Create draft restore while models load

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

* fix(web): preserve pending Fast selection

* fix: apply Fast and Plan to imported Codex sessions

* test: narrow imported Codex session id

* fix: forward explicit Standard service tier

* fix: integrate create-session controls with current main

* test: close Codex RPC suite

* fix: preserve existing session spawn field

* fix(web): integrate Codex controls with current New Session form

* fix(web): reconcile draft types and submit state

* fix(hub): integrate spawn arguments with current resume flow

* test(cli): isolate spawn RPC suite

---------

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

hub/src/sync/syncEngine.ts

@@ -811,7 +811,8 @@ export class SyncEngine {
         effort?: string,
         permissionMode?: PermissionMode,
         serviceTier?: string,
-        existingSessionId?: string
+        existingSessionId?: string,
+        collaborationMode?: CodexCollaborationMode
     ): Promise<{ type: 'success'; sessionId: string } | { type: 'error'; message: string }> {
         return await this.rpcGateway.spawnSession(
             machineId,
@@ -826,7 +827,8 @@ export class SyncEngine {
             effort,
             permissionMode,
             serviceTier,
-            existingSessionId
+            existingSessionId,
+            collaborationMode
         )
     }
 
@@ -1300,7 +1302,8 @@ export class SyncEngine {
             session.effort ?? undefined,
             preferredPermissionMode,
             session.serviceTier ?? undefined,
-            access.sessionId
+            access.sessionId,
+            session.collaborationMode ?? undefined
         )
 
         if (spawnResult.type !== 'success') {