Introduces a plan/execute mode system for the AI agent. In plan mode the
agent is read-only — it analyzes footage, asks clarifying questions, and
submits a structured step-by-step plan. The user reviews and approves
before the agent switches to execute mode to apply edits.
New tools: submit_plan, ask_user, request_plan_approval, update_plan_step.
UI: plan panel checklist, mode transition modal, question prompt with
options, and Enter/Shift+Enter mode toggle in chat input.
Luis Esteban Acevedo Ladino