feat(core): 基础资产 Agent 化 — 商品三视图(image_edit 参考主图)+ 人物立绘/三视图异步生成 + 演员库/详情

- 商品三视图:有真实商品主图时走 image_edit,以主图为参考锁包装一致(品牌字/配色/外形/Logo)
- 人物:据「某一版立绘」异步生成配套三视图(image_edit,worker 内跑),立绘/三视图各存版本可切换
- 基础资产出图改异步(run_base_asset_task / generate_triview_task),Web 层不被慢出图占住
- 前端:演员库浏览/新增、人物详情(立绘+三视图+版本切换/下载/查看大图)、按 busyKey 的单卡并发 loading(genBusy,替代全局 genBusyKey,各按钮互不阻塞)
- dev:本地连云端 MySQL 复用连接(CONN_MAX_AGE/health check/connect_timeout),仅 development 生效
- 含 projects 测试补充

tsc + py_compile + 26 后端测试通过。

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

core/frontend/src/api.ts

@@ -298,8 +298,9 @@ export const api = {
   generateVoiceover(projectId: string, payload: { items: Array<{ index: number; text: string }>; voice_type?: string; speed_ratio?: number }) {
     return request<{ voiceover: VoiceoverInfo }>(`/api/projects/${projectId}/generate-voiceover/`, { method: "POST", body: JSON.stringify(payload) });
   },
+  // 异步:提交后秒回 RESERVED 任务,再用 generateImageStatus 轮询取结果(慢出图在 worker 跑,Web 不被占住)
   generateBaseAsset(projectId: string, payload: { kind: "product" | "person" | "scene"; prompt: string; label?: string }) {
-    return request(`/api/projects/${projectId}/generate-base-asset/`, { method: "POST", body: JSON.stringify(payload) });
+    return request<{ task: { id: string; status: string } }>(`/api/projects/${projectId}/generate-base-asset/`, { method: "POST", body: JSON.stringify(payload) });
   },
   adoptBaseAsset(projectId: string, payload: { group_id: string; asset_id: string }) {
     return request(`/api/projects/${projectId}/adopt-base-asset/`, { method: "POST", body: JSON.stringify(payload) });
@@ -309,8 +310,9 @@ export const api = {
     return request(`/api/projects/${projectId}/attach-base-asset/`, { method: "POST", body: JSON.stringify(payload) });
   },
   // 流程步骤4 · 据某一版立绘资产生成它配套的三视图(image_edit 锁角色一致性,绑定该立绘 asset)
+  // 异步:提交后秒回 RESERVED 任务,再用 generateImageStatus 轮询取结果(慢 image_edit 在 worker 跑)
   generateTriview(projectId: string, payload: { portrait_asset_id: string }) {
-    return request<{ id: string }>(`/api/projects/${projectId}/generate-triview/`, { method: "POST", body: JSON.stringify(payload) });
+    return request<{ task: { id: string; status: string } }>(`/api/projects/${projectId}/generate-triview/`, { method: "POST", body: JSON.stringify(payload) });
   },
   // 轮询本团队真人资产的火山审核状态(绿盾 active / 红标 failed),刷新基础资产趴徽章
   pollReviews(projectId: string) {