Add deterministic traverse-starter UI flow

[enricopiovesan]

Purpose

Implement the end-to-end user flow: enter a note → send to Traverse runtime → render runtime-provided structured output. The UI must not compute any business fields itself.

Definition of Done

• User can enter a short note or starter input
• UI sends input to Traverse runtime
• UI renders runtime-provided structured result fields: title, tags, note type, suggested next action, workflow/event status
• UI does not compute these fields locally
• Feature is deterministic — no live AI/model access required

Constraints

The following fields are runtime-owned; the UI renders only:

• Deterministic tags
• Note type
• Suggested next action
• Workflow/event status

Dependencies

Depends on #3 (runtime event client boundary).