diff --git a/src/components/image-editor/model3d-generation/useModel3dGenerationTask.test.tsx b/src/components/image-editor/model3d-generation/useModel3dGenerationTask.test.tsx
index b2398bb0e..ddd1b3065 100644
--- a/src/components/image-editor/model3d-generation/useModel3dGenerationTask.test.tsx
+++ b/src/components/image-editor/model3d-generation/useModel3dGenerationTask.test.tsx
@@ -276,6 +276,23 @@ describe('useModel3dGenerationTask', () => {
     expect(result.current.dialog.composerOpen).toBe(true);
   });
 
+  it('构造提交计划时抛的错也落到失败态，而不是漏成未捕获的 rejection', async () => {
+    // 老快照缺字段：resolveModel3dResultTitle 会读 dialog.prompt.trim()，在计划构造前就抛。
+    const { result } = renderTask({
+      dialog: createDialog({ prompt: undefined }),
+    });
+
+    await act(async () => {
+      await result.current.submitModel3dGeneration(
+        createDialog({ prompt: undefined }),
+      );
+    });
+
+    expect(result.current.dialog.status).toBe('failed');
+    expect(result.current.dialog.composerOpen).toBe(true);
+    expect(submitModel3dTextToModelRequestMock).not.toHaveBeenCalled();
+  });
+
   it('定价段缺失时不发请求，只把不可提交的原因写回面板', async () => {
     applyEditorGenerationPricingConfig({
       models: EDITOR_MODEL_MUD_POINT_CONFIG,
diff --git a/src/components/image-editor/model3d-generation/useModel3dGenerationTask.ts b/src/components/image-editor/model3d-generation/useModel3dGenerationTask.ts
index 506214383..1a8c19925 100644
--- a/src/components/image-editor/model3d-generation/useModel3dGenerationTask.ts
+++ b/src/components/image-editor/model3d-generation/useModel3dGenerationTask.ts
@@ -74,41 +74,43 @@ export function useModel3dGenerationTask({
       if (!dialogId || !isModel3dGenerationMode(dialog.mode)) {
         return;
       }
-      const placeholder = getGeneratingDialogPlaceholder(dialog);
-      const canvasCompletion =
-        projectId && placeholder
-          ? {
-              dialogId,
-              title: resolveModel3dResultTitle(dialog),
-              placeholder,
-            }
-          : null;
-      const planResult = buildModel3dSubmissionPlan({
-        dialog,
-        projectId,
-        canvasCompletion,
-        assetFolderId,
-        assetLabel: resolveModel3dResultTitle(dialog),
-        pricing: readEditorModel3dPricingConfig(),
-      });
-      if (!planResult.ok) {
+      // 整个提交编排都落在 try 里：取占位框、算标题、构造提交计划同样可能抛
+      // （注入的回调、老快照缺字段），漏出去就成了一次没有用户提示的未捕获 rejection。
+      try {
+        const placeholder = getGeneratingDialogPlaceholder(dialog);
+        const canvasCompletion =
+          projectId && placeholder
+            ? {
+                dialogId,
+                title: resolveModel3dResultTitle(dialog),
+                placeholder,
+              }
+            : null;
+        const planResult = buildModel3dSubmissionPlan({
+          dialog,
+          projectId,
+          canvasCompletion,
+          assetFolderId,
+          assetLabel: resolveModel3dResultTitle(dialog),
+          pricing: readEditorModel3dPricingConfig(),
+        });
+        if (!planResult.ok) {
+          updateCanvasGenerationDialogById(dialogId, (currentDialog) => ({
+            ...currentDialog,
+            status: 'failed',
+            composerOpen: true,
+            errorMessage: planResult.message,
+          }));
+          return;
+        }
         updateCanvasGenerationDialogById(dialogId, (currentDialog) => ({
           ...currentDialog,
-          status: 'failed',
-          composerOpen: true,
-          errorMessage: planResult.message,
+          // 兜底铸的代次要写回状态：否则老快照每次提交都换幂等键，去重保护失效。
+          model3dAttemptNonce: planResult.plan.attemptNonce,
+          status: 'generating',
+          composerOpen: false,
+          errorMessage: undefined,
         }));
-        return;
-      }
-      updateCanvasGenerationDialogById(dialogId, (currentDialog) => ({
-        ...currentDialog,
-        // 兜底铸的代次要写回状态：否则老快照每次提交都换幂等键，去重保护失效。
-        model3dAttemptNonce: planResult.plan.attemptNonce,
-        status: 'generating',
-        composerOpen: false,
-        errorMessage: undefined,
-      }));
-      try {
         const plan = planResult.plan;
         // 判别联合在这里收窄：文生与图生各走自己的客户端函数，端点与提交体的配对由类型保证。
         const response =