Moves debugMode, the scripted end-to-end simulation (simulationPilotSteps,
simulationDecisions, runFullSimulation and its helpers), the decision-trace
computeds the debug drawer renders, and debugState/debugNextStates out of
live-atc.vue.
The page keeps only the destructured bindings its debug template still
reads; once DebugPanel.vue exists it constructs this composable itself and
the page stops touching it entirely.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
