feat: 解耦角色与模特并完善模特库

core/frontend/src/App.tsx

@@ -996,18 +996,18 @@ export function App() {
           const assetId = await submitAndPollAsset(() => api.generateTriview(pipelineProject.id, { portrait_asset_id: portraitAssetId }), "三视图已据立绘生成");
           return assetId ? { id: assetId } : null;
         }}
-        onGenerateActor={(prompt) => generateImages({ prompt, mode: "model", count: 1 })}
-        onUploadActor={(file) => {
+        onGenerateModel={(prompt) => generateImages({ prompt, mode: "model", count: 1 })}
+        onUploadModel={(file) => {
           const fd = new FormData();
           fd.append("file", file);
           fd.append("name", file.name);
           fd.append("asset_type", "image");
-          fd.append("category", "person");
-          // 返回上传后的 Asset(供添加人物工作台进右侧栏做三视图/命名)
+          fd.append("category", "model_portrait");
+          // 返回上传后的模特形象 Asset，保存模特时复用它创建 Model。
           return action(() => api.uploadAsset(fd), "");
         }}
-        // 流程步骤4 · 添加人物工作台命名:把名字写回该人物资产
-        onRenameActor={(assetId, name) => action(() => api.updateAsset(assetId, { name }), "")}
+        // 流程步骤4 · 添加模特工作台命名：同步写回形象资产名称。
+        onRenameModel={(assetId, name) => action(() => api.updateAsset(assetId, { name }), "")}
         onSkipStoryboard={() => action(() => api.skipStoryboard(pipelineProject.id), "已跳过故事板")}
         onSubmitVideo={(segmentId, prompt) => action(() => api.submitVideo(pipelineProject.id, { video_segment_id: segmentId, prompt }), "视频片段已提交,生成中…")}
         onSubmitAllVideos={(prompt) =>