回退完美像素原尺寸恢复

直接持久化逻辑分辨率 PNG 并使用最终实际尺寸
升级手动完美像素算法版本并拦截跨版本重放孤儿对象
补充非整除网格和前端权威对账回归测试
同步完美像素契约、决策记录与排障说明

src/components/image-editor/useImageCanvasGenerationWorkflow.ts

@@ -2799,6 +2799,10 @@ export function useImageCanvasGenerationWorkflow({
           error instanceof ApiClientError &&
           (error.details as { resultPersistenceStarted?: unknown } | null)
             ?.resultPersistenceStarted === true;
+        const operationResultAlreadyExists =
+          error instanceof ApiClientError &&
+          (error.details as { operationResultAlreadyExists?: unknown } | null)
+            ?.operationResultAlreadyExists === true;
         const outcomeMayBePersisted =
           perfectPixelPostAttempted &&
           Boolean(perfectPixelDialogId) &&
@@ -2808,6 +2812,9 @@ export function useImageCanvasGenerationWorkflow({
           // 而此时 api-server 可能已经走完 OSS PUT 与落库。必须算作未知结果去对账。
           (!(error instanceof ApiClientError) ||
             persistenceMayHaveStarted ||
+            // 中文注释：跨算法版本护栏在本请求 PUT 前发现同 operation 已有权威结果；它不应
+            // 冒充 resultPersistenceStarted，但同样必须读取项目事实完成收口。
+            operationResultAlreadyExists ||
             isGatewayUnknownOutcomeError(error));
         let reconciledMessage: string | undefined;
         let keepPendingConfirmation = false;
@@ -3041,10 +3048,15 @@ export function useImageCanvasGenerationWorkflow({
           error instanceof ApiClientError &&
           (error.details as { resultPersistenceStarted?: unknown } | null)
             ?.resultPersistenceStarted === true;
+        const operationResultAlreadyExists =
+          error instanceof ApiClientError &&
+          (error.details as { operationResultAlreadyExists?: unknown } | null)
+            ?.operationResultAlreadyExists === true;
         const outcomeMayBePersisted =
           postAttempted &&
           (!(error instanceof ApiClientError) ||
             persistenceMayHaveStarted ||
+            operationResultAlreadyExists ||
             isGatewayUnknownOutcomeError(error));
         if (outcomeMayBePersisted) {
           const verdict = await reconcilePerfectPixelProject(