chore: establish learning module baseline

OpenMAIC/lib/agent/client/apply-slide-content.ts

@@ -0,0 +1,23 @@
+'use client';
+
+/**
+ * Apply a scene patch to the stage store while keeping the OPEN slide edit
+ * session in lockstep. Shared by both the `regenerate_scene` apply path and the
+ * "restore previous" button — without reseeding the open session, the canvas
+ * keeps rendering its stale `history.present` and the next edit clobbers the
+ * applied change.
+ */
+import { flushStageSave, useStageStore } from '@/lib/store/stage';
+import { useSlideEditSession } from '@/components/edit/surfaces/slide/slide-edit-session';
+import type { ScenePatch, SlideContent } from '@/lib/types/stage';
+
+/** Apply a scene patch to the stage store and keep the OPEN slide edit session
+ *  in lockstep (else the canvas renders stale history and clobbers the change). */
+export async function applyScenePatchInSync(sceneId: string, patch: ScenePatch): Promise<void> {
+  useStageStore.getState().updateScene(sceneId, patch);
+  const es = useSlideEditSession.getState();
+  if (patch.content && es.sceneId === sceneId) {
+    es.seed(sceneId, patch.content as SlideContent);
+  }
+  await flushStageSave();
+}