feat(npcs): drop binding; select NPCs on storyline export

Remove storyline/scene NPC binding and export chosen NPCs with relations/groups. Harden export modal so a missing npcs payload no longer blacks out the editor.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/renderer/editor/state/projectState.ts

@@ -148,10 +148,14 @@ type Actions = {
     npcResolutions?: NpcImportResolution[],
   ) => Promise<{ project: Project; report: StorylineImportMergeReport }>;
   importProjectFromPath: (filePath: string) => Promise<void>;
-  getProjectStorylines: (projectId: ProjectId, labels: StorylineLabels) => Promise<StorylineListItem[]>;
+  getProjectStorylines: (
+    projectId: ProjectId,
+    labels: StorylineLabels,
+  ) => Promise<{ storylines: StorylineListItem[]; npcs: { id: string; name: string }[] }>;
   exportProject: (
     projectId: ProjectId,
     storylineSelections: StorylineSelection[],
+    npcIds: string[],
     labels: StorylineLabels,
   ) => Promise<void>;
   deleteProject: (projectId: ProjectId) => Promise<void>;
@@ -869,18 +873,23 @@ export function useProjectState(licenseActive: boolean, opts?: ProjectStateOpts)
 
     const getProjectStorylines = async (projectId: ProjectId, labels: StorylineLabels) => {
       const res = await api.invoke(ipcChannels.project.getProjectStorylines, { projectId, labels });
-      return res.storylines;
+      return {
+        storylines: Array.isArray(res?.storylines) ? res.storylines : [],
+        npcs: Array.isArray(res?.npcs) ? res.npcs : [],
+      };
     };
 
     const exportProject = async (
       projectId: ProjectId,
       storylineSelections: StorylineSelection[],
+      npcIds: string[],
       labels: StorylineLabels,
     ) => {
       try {
         const res = await api.invoke(ipcChannels.project.exportZip, {
           projectId,
           storylineSelections,
+          npcIds,
           labels,
         });
         if (res.canceled) return;