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/renderer/shared/RotatedImage.tsx

@@ -9,6 +9,8 @@ type RotatedImageProps = {
   rotationDeg: 0 | 90 | 180 | 270;
   mode: Mode;
   alt?: string;
+  loading?: React.ImgHTMLAttributes<HTMLImageElement>['loading'];
+  decoding?: React.ImgHTMLAttributes<HTMLImageElement>['decoding'];
   /** Высота/ширина полностью контролируются родителем. */
   style?: React.CSSProperties;
   /** Прямоугольник видимого контента (contain/cover) внутри контейнера. */
@@ -40,6 +42,8 @@ export function RotatedImage({
   rotationDeg,
   mode,
   alt = '',
+  loading,
+  decoding,
   style,
   onContentRectChange,
 }: RotatedImageProps) {
@@ -91,6 +95,8 @@ export function RotatedImage({
       <img
         alt={alt}
         src={url}
+        loading={loading}
+        decoding={decoding}
         className={styles.img}
         style={{
           width: w ?? '100%',