Live state machine visualization with alternatives

[20001LastOrder]

Show the current state, the transition taken, and the alternatives that were available but not taken. Explicit states make this cheap; free-form agents cannot offer it at all.

The main idea is that the agent should keep the options open and record the list of decisions made during the design and execution process. The state machine can be used to plan and track such activity

• Render the machine and current state from the event tap
• Surface candidate transitions per step, including the untaken ones
• Decide the surface: an agent platform plugin panel vs a standalone viewer