Function beginBrowserGoalStep

beginBrowserGoalStep(
    provider: IMetadataProvider,
    contextUser: UserInfo,
    coAgentRunID: string,
    goal: string,
): Promise<MJAIAgentRunStepEntity>
Creates the parent Tool step ("Browser goal: …") on the realtime co-agent run for a goal-driven browser run — a single top-level timeline node the computer-use prompt steps then nest under. Best-effort: returns null (so the goal still runs, just unlinked) when there's no co-agent run to attach to, or on any error. Uses the shared initAgentRunStep helper so the field shape matches every other agent-run step.
Parameters
- provider: IMetadataProvider
  The metadata provider.
- contextUser: UserInfo
  The acting user.
- coAgentRunID: string
  The realtime co-agent run id (the parent run), or undefined.
- goal: string
  The natural-language goal (becomes the step name).
Returns Promise<MJAIAgentRunStepEntity>
The saved parent step (to finalize + nest under), or null.
- Defined in packages/MJServer/src/agentSessions/remoteBrowserGoalEngine.ts:125