提交计划去掉无人读取的 title 字段

- src/components/image-editor/model3d-generation/Model3dGenerationSubmission.ts：Model3dSubmissionPlanBase.title 没有任何消费方（调用方自己按 resolveModel3dResultTitle 重算），删除该字段与它的装配代码，避免把死数据当成权威标题

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

@@ -48,7 +48,6 @@ type Model3dSubmissionPlanBase = {
    */
   attemptNonce: string;
   requestKey: string;
-  title: string;
 };
 
 export type Model3dSubmissionPlan =
@@ -169,7 +168,6 @@ export function buildModel3dSubmissionPlan({
     ...(trimmedProjectId && canvasCompletion ? { canvasCompletion } : {}),
   };
   // 一个端点一个收口函数：端点字面量与提交体类型在同一处配对，判别联合据此收窄。
-  const title = resolveModel3dResultTitle(dialog);
   const finishTextToModel = (
     body: Model3dTextToModelRequest,
   ): { ok: true; plan: Model3dSubmissionPlan } => ({
@@ -182,7 +180,6 @@ export function buildModel3dSubmissionPlan({
         endpoint: 'text-to-model',
         body,
       }),
-      title,
       body,
     },
   });
@@ -198,7 +195,6 @@ export function buildModel3dSubmissionPlan({
         endpoint: 'image-to-model',
         body,
       }),
-      title,
       body,
     },
   });