fix: game audio persistence and editor perf

- Keep game/campaign audio assets referenced (no prune)
- Flush pending project save on quit/switch/export to avoid losing campaignAudios
- Control: prevent game music restarts on scene changes; allow always-on controls; handle autoplay-after-scene-audio
- Editor: reduce ReactFlow churn with stable scene card map; lazy/async image decode
- Add contract/unit tests and update test script

Made-with: Cursor

app/main/index.ts

@@ -172,6 +172,27 @@ async function runStartupAfterHandlers(licenseService: LicenseService): Promise<
 
 async function main() {
   await app.whenReady();
+  /**
+   * `ZipProjectStore` пишет `project.json` в кэш синхронно с мутациями, а упаковку `.dnd.zip`
+   * откладывает (`queueSave`, ~250 мс). Без финального `saveNow()` при выходе на диске
+   * остаётся старый zip — при следующем открытии кэш пересоздаётся из него и теряются
+   * недавние поля (в т.ч. `campaignAudios`).
+   */
+  let appQuittingAfterPendingSave = false;
+  app.on('before-quit', (e) => {
+    if (appQuittingAfterPendingSave) return;
+    e.preventDefault();
+    appQuittingAfterPendingSave = true;
+    void projectStore
+      .saveNow()
+      .catch((err: unknown) => {
+        console.error('[before-quit] saveNow failed', err);
+      })
+      .finally(() => {
+        app.quit();
+      });
+  });
+
   const licenseService = new LicenseService(app.getPath('userData'));
   setLicenseAssert(() => {
     licenseService.assertForIpc();
@@ -286,6 +307,30 @@ async function main() {
     emitSessionState();
     return result;
   });
+  registerHandler(ipcChannels.project.importCampaignAudio, async () => {
+    const { canceled, filePaths } = await dialog.showOpenDialog({
+      properties: ['openFile', 'multiSelections'],
+      filters: [
+        {
+          name: 'Аудио',
+          extensions: ['mp3', 'wav', 'ogg', 'm4a', 'aac'],
+        },
+      ],
+    });
+    if (canceled || filePaths.length === 0) {
+      const project = projectStore.getOpenProject();
+      if (!project) throw new Error('No open project');
+      return { canceled: true as const, project, imported: [] };
+    }
+    const result = await projectStore.importCampaignAudioFiles(filePaths);
+    emitSessionState();
+    return { canceled: false as const, ...result };
+  });
+  registerHandler(ipcChannels.project.updateCampaignAudios, async ({ audios }) => {
+    const project = await projectStore.setCampaignAudios(audios);
+    emitSessionState();
+    return { project };
+  });
   registerHandler(ipcChannels.project.importScenePreview, async ({ sceneId }) => {
     const { canceled, filePaths } = await dialog.showOpenDialog({
       properties: ['openFile'],