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/project/zipStore.legacyContract.test.ts

@@ -23,3 +23,19 @@ void test('zipStore: legacy migration moves or copy\\+rm so deleted projects are
   assert.match(src, /rmWithRetries\(fs\.rm, from, \{ force: true \}\)/);
   assert.match(src, /не «возрождались»/);
 });
+
+void test('zipStore: openProjectById flushes pending saveNow before cache reset', () => {
+  const src = fs.readFileSync(path.join(here, 'zipStore.ts'), 'utf8');
+  // When switching projects we rm cacheDir and unzip zip; ensure pending debounced pack is flushed first.
+  assert.match(src, /async openProjectById/);
+  assert.match(src, /if \(this\.openProject\)\s*\{\s*await this\.saveNow\(\);\s*\}/);
+  assert.match(src, /await fs\.rm\(cacheDir, \{ recursive: true, force: true \}\)/);
+  assert.match(src, /await unzipToDir\(zipPath, cacheDir\)/);
+});
+
+void test('zipStore: exportProjectZipToPath flushes saveNow for currently open project', () => {
+  const src = fs.readFileSync(path.join(here, 'zipStore.ts'), 'utf8');
+  assert.match(src, /async exportProjectZipToPath/);
+  assert.match(src, /if \(this\.openProject\?\.id === projectId\)\s*\{\s*await this\.saveNow\(\);\s*\}/);
+  assert.match(src, /await fs\.copyFile\(src, dest\)/);
+});