画布没接住任务状态时按失败收口

- src/components/image-editor/model3d-generation/useModel3dGenerationTask.ts：applyQueuedGeneration 返回 false 时不再静默复位成 idle（用户会以为没提交过、再点一次就是又一次已扣费的外部生成），改为写回失败态与明确文案
- src/components/image-editor/model3d-generation/Model3dGenerationSubmission.ts：新增 MODEL3D_QUEUE_HANDOFF_FAILED_MESSAGE，与「服务端没返回任务状态」区分开
- src/components/image-editor/model3d-generation/useModel3dGenerationTask.test.tsx：原「回到空闲态」用例改为断言失败态

src/components/image-editor/model3d-generation/Model3dGenerationSubmission.ts

@@ -36,6 +36,8 @@ export const MODEL3D_GENERATION_TIMEOUT_MESSAGE =
   '3D 生成请求超时，请稍后重试。';
 export const MODEL3D_SUBMISSION_MISSING_QUEUE_STATE_MESSAGE =
   '3D 生成任务已提交，但服务端没有返回任务状态，请稍后重试。';
+export const MODEL3D_QUEUE_HANDOFF_FAILED_MESSAGE =
+  '3D 生成任务已提交，但画布没能接收任务状态，请刷新页面查看结果。';
 
 /**
  * 提交计划按端点做成判别联合：`endpoint` 同时决定提交地址与提交体契约。

src/components/image-editor/model3d-generation/useModel3dGenerationTask.test.tsx

@@ -23,7 +23,10 @@ import {
   createModel3dGenerationDraftFields,
   MODEL3D_PRICING_UNAVAILABLE_REASON,
 } from './Model3dGenerationFormModel';
-import { MODEL3D_SUBMISSION_MISSING_QUEUE_STATE_MESSAGE } from './Model3dGenerationSubmission';
+import {
+  MODEL3D_QUEUE_HANDOFF_FAILED_MESSAGE,
+  MODEL3D_SUBMISSION_MISSING_QUEUE_STATE_MESSAGE,
+} from './Model3dGenerationSubmission';
 import { useModel3dGenerationTask } from './useModel3dGenerationTask';
 
 const submitModel3dTextToModelRequestMock = vi.hoisted(() => vi.fn());
@@ -218,7 +221,7 @@ describe('useModel3dGenerationTask', () => {
     expect(request.idempotencyKey.startsWith(`${persistedNonce}-`)).toBe(true);
   });
 
-  it('排队链路没接手时回到可再次提交的空闲态', async () => {
+  it('排队链路没接手时不静默复位成空闲态', async () => {
     submitModel3dTextToModelRequestMock.mockResolvedValue({
       operationId: 'task-1',
       jobKind: 'model3d_text_to_model',
@@ -234,7 +237,10 @@ describe('useModel3dGenerationTask', () => {
       await result.current.submitModel3dGeneration(createDialog());
     });
 
-    expect(result.current.dialog.status).toBe('idle');
+    expect(result.current.dialog.status).toBe('failed');
+    expect(result.current.dialog.errorMessage).toBe(
+      MODEL3D_QUEUE_HANDOFF_FAILED_MESSAGE,
+    );
     expect(result.current.dialog.composerOpen).toBe(true);
   });
 

src/components/image-editor/model3d-generation/useModel3dGenerationTask.ts

@@ -17,6 +17,7 @@ import { readEditorModel3dPricingConfig } from '../ImageCanvasGenerationModel';
 import { isModel3dGenerationMode } from './Model3dGenerationFormModel';
 import {
   buildModel3dSubmissionPlan,
+  MODEL3D_QUEUE_HANDOFF_FAILED_MESSAGE,
   MODEL3D_SUBMISSION_MISSING_QUEUE_STATE_MESSAGE,
   model3dQueueStateFromResponse,
   resolveModel3dGenerationErrorMessage,
@@ -150,11 +151,13 @@ export function useModel3dGenerationTask({
         ) {
           return;
         }
+        // 画布没接住这份任务状态时不能静默复位成 idle：用户会以为没提交过，
+        // 再点一次就是又一次外部生成（已经扣过费）。按失败收口，让用户先去看结果。
         updateCanvasGenerationDialogById(dialogId, (currentDialog) => ({
           ...currentDialog,
-          status: 'idle',
+          status: 'failed',
           composerOpen: true,
-          errorMessage: undefined,
+          errorMessage: MODEL3D_QUEUE_HANDOFF_FAILED_MESSAGE,
         }));
       } catch (error) {
         // 超时等失败也可能意味着服务端已经扣费（与其它生成链路的