发布媒体回填的 revoke 移出 state updater

- VersionMediaApplyTarget 增加 getCover/getScreenshots，覆盖前先 revoke 旧的本地预览
- 两个调用点用 ref 提供当前媒体；updater 只做纯计算，StrictMode 重放不再撤销仍在用的 blob URL

src/components/game-distribution/GamePublishPage.tsx

@@ -203,6 +203,8 @@ export function GamePublishPage({
           title: detail.game.title,
         });
         void applyVersionMediaDefaults(detail, {
+          getCover: () => coverImageRef.current,
+          getScreenshots: () => screenshotImagesRef.current,
           setCover: setCoverImage,
           setScreenshots: setScreenshotImages,
           isCancelled: () => cancelled,
@@ -285,6 +287,8 @@ export function GamePublishPage({
           setPriceInput('');
         }
         void applyVersionMediaDefaults(detail, {
+          getCover: () => coverImageRef.current,
+          getScreenshots: () => screenshotImagesRef.current,
           setCover: setCoverImage,
           setScreenshots: setScreenshotImages,
           isCancelled: () => cancelled,

src/components/game-distribution/GameWorkMetadataEditor.tsx

@@ -132,6 +132,8 @@ export function GameWorkMetadataEditor({
       .then((detail) => {
         if (cancelled) return;
         return applyVersionMediaDefaults(detail, {
+          getCover: () => coverImageRef.current,
+          getScreenshots: () => screenshotImagesRef.current,
           setCover: setCoverImage,
           setScreenshots: setScreenshotImages,
           isCancelled: () => cancelled,

src/components/game-distribution/gamePublishMediaDefaults.test.ts

@@ -44,6 +44,8 @@ describe('applyVersionMediaDefaults', () => {
     } as unknown as GameDistributionVersionDetail;
 
     await applyVersionMediaDefaults(detail, {
+      getCover: () => cover,
+      getScreenshots: () => screenshots,
       setCover: (updater) => {
         cover = updater(cover);
       },

src/components/game-distribution/gamePublishMediaDefaults.ts

@@ -7,6 +7,13 @@ import {
 } from './gamePublishAssets';
 
 type VersionMediaApplyTarget = {
+  /**
+   * 调用瞬间的当前封面。用 ref 读最新值而不是接收 updater：释放 blob URL 是副作用，放进
+   * `setState` 的 updater 里会被 StrictMode 双调用/重放，撤销到仍被渲染引用的 URL。
+   */
+  getCover: () => GamePublishImage | null;
+  /** 调用瞬间的当前截图，理由同 {@link getCover}。 */
+  getScreenshots: () => GamePublishImage[];
   setCover: (
     updater: (current: GamePublishImage | null) => GamePublishImage | null,
   ) => void;
@@ -48,19 +55,20 @@ export async function applyVersionMediaDefaults(
     .filter(Boolean);
   if (apply.isCancelled()) return;
   // 覆盖前先释放被替换掉的本地预览 blob URL：这一步之后旧对象不再有人引用，不 revoke 就泄漏。
-  apply.setCover((current) => {
-    revokeGamePublishImagePreview(current);
-    return coverObjectKey ? buildCover('') : null;
-  });
-  apply.setScreenshots((current) => {
-    for (const image of current) revokeGamePublishImagePreview(image);
-    return screenshotObjectKeys.map((objectKey, index) => ({
+  // revoke 在 dispatch 之前做，updater 只负责纯计算，重放不会撤销到仍在用的 URL。
+  revokeGamePublishImagePreview(apply.getCover());
+  for (const image of apply.getScreenshots()) {
+    revokeGamePublishImagePreview(image);
+  }
+  apply.setCover(() => (coverObjectKey ? buildCover('') : null));
+  apply.setScreenshots(() =>
+    screenshotObjectKeys.map((objectKey, index) => ({
       id: createGamePublishImageId(),
       objectKey,
       src: '',
       name: `截图 ${index + 1}`,
-    }));
-  });
+    })),
+  );
 
   const coverPreview = await resolveGamePublishImagePreview(
     coverObjectKey,