refactor(陶泥儿发布): 上一版本截图 objectKey 归一化抽成单一 helper

- adoptOnlineScreenshots 与 rewriteScreenshotsToOnline 各自重复 map(trim).filter(非空)
- 抽成模块级 onlineScreenshotObjectKeys，两处共用同一口径，新增调用点不再复制

apps/ai-game-creator-shell/src/view/project-development/export/state/useTaonierExport.ts

@@ -84,6 +84,15 @@ export type TaonierOnlineImage = {
   previewUrl: string;
 };
 
+/** 上一版本截图列表 → trim 后的非空 objectKey；「沿用」与「发布后回写」共用同一归一化口径。 */
+function onlineScreenshotObjectKeys(
+  images: readonly TaonierOnlineImage[],
+): string[] {
+  return images
+    .map((image) => image.objectKey.trim())
+    .filter((key) => key.length > 0);
+}
+
 /**
  * 线上值：live `GameDistributionGame` 行的只读投影。
  *
@@ -733,9 +742,7 @@ export function useTaonierExport({
    * 显示上一版本的预览。
    */
   const adoptOnlineScreenshots = useCallback((): void => {
-    const keys = (online?.screenshots ?? [])
-      .map((image) => image.objectKey.trim())
-      .filter((key) => key.length > 0);
+    const keys = onlineScreenshotObjectKeys(online?.screenshots ?? []);
     updateImageFields((previous) => ({
       coverPath: previous.coverPath,
       screenshotPaths: keys,
@@ -751,9 +758,7 @@ export function useTaonierExport({
    */
   const rewriteScreenshotsToOnline = useCallback(
     (values: TaonierOnlineValues): void => {
-      const keys = values.screenshots
-        .map((image) => image.objectKey.trim())
-        .filter((key) => key.length > 0);
+      const keys = onlineScreenshotObjectKeys(values.screenshots);
       if (keys.length === 0) return;
       updateImageFields((previous) => ({
         coverPath: previous.coverPath,