fix: type-check presentation hierarchy projections

web/apps/console/src/presentation/SceneBody.tsx

@@ -241,6 +241,8 @@ const authoringPhaseForBeat = (beatId: string): AuthoringPhaseId => {
 const AuthoringScene = ({ scene, beat }: { scene: SceneDefinition; beat: SceneBeatDefinition }) => {
   const projection = projectPreparedAuthoringPhase(authoringPhaseForBeat(beat.id));
   const primaryCommand = projection.commands[0];
+  // The prepared recording is the factual source for this public-operation label.
+  if (!primaryCommand) throw new Error(`Authoring phase ${projection.phase} has no public operation`);
 
   return (
     <>

web/apps/console/src/presentation/presentation-coherence.ts

@@ -172,7 +172,7 @@ export const beatVisualContractFor = (
   beatId: string,
 ): SceneBeatVisualContract => {
   const key = `${sceneId}/${beatId}`;
-  const contract = beatContracts[key];
+  const contract = beatContracts[key as keyof typeof beatContracts];
   if (!contract) throw new Error(`No visual contract for ${key}`);
   return { sceneId, beatId, ...contract };
 };