修复重复生成占位的对账判定

收集项目快照中全部同 ID 的生成占位原始记录。

通用队列链在任一重复占位未收口时执行第二次项目读取。

完美像素遇到重复操作占位时失败关闭为冲突。

补充两条缺陷定向测试并同步技术方案与决策记录。

src/components/image-editor/ImageCanvasEditorModel.ts

@@ -791,19 +791,20 @@ function isCanvasSettingsLayoutItem(
 }
 
 /**
- * 中文注释：从快照里取出指定 id 的生成占位原始记录，取不到返回 null。
+ * 中文注释：从快照里取出指定 id 的全部生成占位原始记录，取不到返回空数组。
  *
  * 用原始 record 而不是 hydrate：调用方要判的是服务端写了什么，hydrate 会给缺失字段补默认值
  * （例如 status 缺失时补 `idle`），把「服务端没写」和「服务端写了 idle」混成一种。
  */
-export function findCanvasGenerationDialogRecord(
+export function findCanvasGenerationDialogRecords(
   project: EditorProjectSnapshot,
   dialogId: string | null | undefined,
-): Record<string, unknown> | null {
+): Record<string, unknown>[] {
   const normalizedDialogId = dialogId?.trim();
   if (!normalizedDialogId) {
-    return null;
+    return [];
   }
+  const matchingDialogs: Record<string, unknown>[] = [];
   for (const item of project.layers) {
     if (item.itemType !== 'generation-dialog') {
       continue;
@@ -814,10 +815,10 @@ export function findCanvasGenerationDialogRecord(
         ? ((item as { dialog?: unknown }).dialog as Record<string, unknown>)
         : null;
     if (dialog?.id === normalizedDialogId) {
-      return dialog;
+      matchingDialogs.push(dialog);
     }
   }
-  return null;
+  return matchingDialogs;
 }
 
 /**

src/components/image-editor/useImageCanvasGenerationSubmissionWorkflow.test.tsx

@@ -2009,7 +2009,7 @@ describe('useImageCanvasGenerationSubmissionWorkflow', () => {
     );
   });
 
-  it('reloads a queued project snapshot again when the completion dialog is still unresolved', async () => {
+  it('reloads a queued project snapshot when a later duplicate completion dialog is unresolved', async () => {
     vi.useFakeTimers();
     try {
       const applyProjectSnapshot = vi.fn();
@@ -2020,6 +2020,16 @@ describe('useImageCanvasGenerationSubmissionWorkflow', () => {
         title: '队列项目',
         viewport: { x: 0, y: 0, scale: 1 },
         layers: [
+          {
+            layerId: 'generation-dialog-background-removal-completed',
+            resourceId: 'generation-dialog-background-removal-completed',
+            itemType: 'generation-dialog',
+            dialog: {
+              id: 'dialog-background-removal',
+              status: 'idle',
+              generatedLayerId: 'layer-background-removal-result',
+            },
+          },
           {
             layerId: 'generation-dialog-background-removal',
             resourceId: 'generation-dialog-background-removal',

src/components/image-editor/useImageCanvasGenerationSubmissionWorkflow.ts

@@ -30,7 +30,7 @@ import {
   loadEditorProject,
 } from '../../services/image-editor/editorProjectClient';
 import {
-  findCanvasGenerationDialogRecord,
+  findCanvasGenerationDialogRecords,
   isUnresolvedCanvasGenerationDialogRecord,
 } from './ImageCanvasEditorModel';
 import type {
@@ -456,8 +456,8 @@ function projectHasUnresolvedGenerationDialog(
   project: EditorProjectSnapshot,
   dialogId: string | null | undefined,
 ) {
-  return isUnresolvedCanvasGenerationDialogRecord(
-    findCanvasGenerationDialogRecord(project, dialogId),
+  return findCanvasGenerationDialogRecords(project, dialogId).some(
+    isUnresolvedCanvasGenerationDialogRecord,
   );
 }
 

src/components/image-editor/useImageCanvasGenerationWorkflow.test.tsx

@@ -1254,6 +1254,34 @@ describe('useImageCanvasGenerationWorkflow', () => {
     ).toMatchObject({ kind: 'pending', project });
   });
 
+  it('rejects duplicate perfect-pixel dialog ids even when the first record appears applied', () => {
+    const operationId = 'perfect-pixel-duplicate-dialog';
+    const project = createPerfectPixelProject(operationId, 'applied');
+    project.layers.push({
+      itemType: 'generation-dialog',
+      layerId: `generation-dialog:${operationId}:duplicate`,
+      resourceId: `generation-dialog:${operationId}:duplicate`,
+      dialog: {
+        id: operationId,
+        mode: 'quick-edit',
+        prompt: '完美像素',
+        status: 'generating',
+        composerOpen: false,
+      },
+    });
+
+    expect(
+      inspectPerfectPixelProjectSnapshot(project, {
+        operationId,
+        taskId: `pixel-art-snap-${operationId}`,
+      }),
+    ).toMatchObject({
+      kind: 'conflict',
+      project,
+      message: '权威项目中存在重复的完美像素占位，无法自动确认结果。',
+    });
+  });
+
   it('requires a matching task resource before a missing dialog can prove asset-only success', () => {
     const operationId = 'perfect-pixel-missing-dialog';
     const matchingProject = createPerfectPixelProject(

src/components/image-editor/useImageCanvasGenerationWorkflow.ts

@@ -29,7 +29,7 @@ import {
 } from '../../services/image-editor/editorProjectClient';
 import { resizeCropExpandFrame } from './ImageCanvasCropExpandModel';
 import {
-  findCanvasGenerationDialogRecord,
+  findCanvasGenerationDialogRecords,
   isUnresolvedCanvasGenerationDialogRecord,
   PERFECT_PIXEL_RECONCILIATION_WINDOW_MS,
 } from './ImageCanvasEditorModel';
@@ -267,7 +267,7 @@ export function inspectPerfectPixelProjectSnapshot(
   const matchingResources = project.resources.filter(
     (resource) => resource.taskId?.trim() === operation.taskId,
   );
-  const dialog = findCanvasGenerationDialogRecord(
+  const matchingDialogs = findCanvasGenerationDialogRecords(
     project,
     operation.operationId,
   );
@@ -279,6 +279,14 @@ export function inspectPerfectPixelProjectSnapshot(
       message: '权威项目中存在重复的完美像素任务资源，无法自动确认结果。',
     };
   }
+  if (matchingDialogs.length > 1) {
+    return {
+      kind: 'conflict',
+      project,
+      message: '权威项目中存在重复的完美像素占位，无法自动确认结果。',
+    };
+  }
+  const dialog = matchingDialogs[0] ?? null;
   const resource = matchingResources[0] ?? null;
   if (!resource) {
     if (!dialog || isUnresolvedCanvasGenerationDialogRecord(dialog)) {