feat(admin): Phase 6 AI任务监控+成本异常 — 全局任务列/筛/详情抽屉/失败重投

后端:adminpanel tasks(全局 AITask + status/type/team/anomaly 筛分页)+ detail(payload)+ retry(失败重投,
仅图像类 best-effort 否则 400);is_cost_anomaly(实际>预估×1.5)+ F() 异常筛;IsPlatformAdmin + 审计。
前端:adminApi tasks 系列;Admin 任务监控页(状态 tab + 仅成本异常 chip + 表格成本预估→实际+异常标 + 详情抽屉 payload + 失败重投)。
修真 bug:抽屉缺 .show 类停屏外,补上正常滑入。
测试:adminpanel 36 单测过(筛/异常/详情/重投 mock celery + 非失败/不支持/权限拒);
无头 e2e _admin-p6.mjs 6 断言过 + 0 console error(不点真重投);tsc+build 绿。

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

core/frontend/src/api.ts

@@ -1,6 +1,8 @@
 import type {
   AdminQualityWord,
   AdminReviewAsset,
+  AdminTask,
+  AdminTaskDetail,
   AdminTeam,
   AdminTeamDetail,
   AdminUser,
@@ -599,5 +601,22 @@ export const adminApi = {
       "/api/admin/asset-reviews/poll/",
       { method: "POST", body: JSON.stringify(assetIds ? { asset_ids: assetIds } : {}) }
     );
+  },
+  tasks(params?: { status?: string; task_type?: string; team?: string; anomaly?: string; page?: number; page_size?: number }) {
+    const qs = new URLSearchParams();
+    if (params?.status) qs.set("status", params.status);
+    if (params?.task_type) qs.set("task_type", params.task_type);
+    if (params?.team) qs.set("team", params.team);
+    if (params?.anomaly) qs.set("anomaly", params.anomaly);
+    if (params?.page) qs.set("page", String(params.page));
+    if (params?.page_size) qs.set("page_size", String(params.page_size));
+    const q = qs.toString();
+    return request<Paginated<AdminTask>>(`/api/admin/tasks/${q ? `?${q}` : ""}`);
+  },
+  taskDetail(id: string) {
+    return request<AdminTaskDetail>(`/api/admin/tasks/${id}/`);
+  },
+  retryTask(id: string) {
+    return request<{ retried: boolean; task_id: string }>(`/api/admin/tasks/${id}/retry/`, { method: "POST" });
   }
 };