3D 提交收到无任务状态的成功响应不再静默复位

- 新增 MODEL3D_SUBMISSION_MISSING_QUEUE_STATE_MESSAGE 提示文案
- 空 body 或缺 status 的 2xx 响应改判失败态并保留提示，不再直接回 idle
- 补用例断言不再触发排队链路且对话框进入失败态

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

@@ -14,6 +14,7 @@ import { readEditorModel3dPricingConfig } from '../ImageCanvasGenerationModel';
 import { isModel3dGenerationMode } from './Model3dGenerationFormModel';
 import {
   buildModel3dSubmissionPlan,
+  MODEL3D_SUBMISSION_MISSING_QUEUE_STATE_MESSAGE,
   model3dQueueStateFromResponse,
   resolveModel3dGenerationErrorMessage,
   resolveModel3dResultTitle,
@@ -106,9 +107,19 @@ export function useModel3dGenerationTask({
           idempotencyKey: planResult.plan.requestKey,
         });
         const queueState = model3dQueueStateFromResponse(response);
+        if (!queueState) {
+          // 2xx 但没有任务状态（空 body 或缺 status 的 payload）不能当成功静默复位：
+          // 用户既看不到任务也没有任何提示，服务端细节被丢掉。
+          updateCanvasGenerationDialogById(dialogId, (currentDialog) => ({
+            ...currentDialog,
+            status: 'failed',
+            composerOpen: true,
+            errorMessage: MODEL3D_SUBMISSION_MISSING_QUEUE_STATE_MESSAGE,
+          }));
+          return;
+        }
         if (
-          queueState &&
-          (await applyQueuedGeneration(
+          await applyQueuedGeneration(
             { queueState },
             projectId,
             applyProjectSnapshot,
@@ -116,7 +127,7 @@ export function useModel3dGenerationTask({
             onWalletBalanceMayHaveChanged,
             onGenerationWarning,
             dialogId,
-          ))
+          )
         ) {
           return;
         }