fix: replace raw codes and internal IDs in the console with Chinese labels

Found in v0.2 visual QA (docs/plan/09-visual-qa.md):
- actor strings (admin_session:<uuid>, user:<uuid>, system) -> 管理员/系统/API Key
  in policy revisions, subscriptions, inbox, trash, business tasks, organize detail
- cache volume without key shows the downloader name instead of instance:<uuid>
- download timeline/plan: task and organize statuses, plan purpose, priority and
  status reason localized; audit gets labels for capability/files/site/feed actions
- organize record reason uses conflict detail (没有可入库的主视频) instead of
  blocked:no_main_video; slot/candidate reasons drop inflight:<uuid>
- identity decision summary no longer shows no_viable_candidate
- upstream test: 'Connection error.' classified as network, with a Chinese hint
- new policy draft prefills key default (placeholder looked like a value)
- dialog/sheet close sr-only text in Chinese

Co-Authored-By: Claude Opus 5.5 <[email protected]>

apps/web/app/lib/labels.ts

@@ -124,3 +124,35 @@ export function spanSec(r: { startedAt: string | null; finishedAt: string | null
   const end = r.finishedAt ? new Date(r.finishedAt).getTime() : Date.now();
   return (end - new Date(r.startedAt).getTime()) / 1000;
 }
+
+/** 服务端记录的操作者串(`admin_session:<id>` / `api_key:<id>` / `policy:<key>` / `system`)→ 界面文字,不露内部 ID */
+export function actorText(v: string | null | undefined): string {
+  if (!v) return "—";
+  const i = v.indexOf(":");
+  const kind = i < 0 ? v : v.slice(0, i);
+  const rest = i < 0 ? "" : v.slice(i + 1);
+  if (kind === "admin_session" || kind === "dev_admin" || kind === "user") return "管理员";
+  if (kind === "agent" || kind === "agent_run") return "Agent";
+  if (kind === "schedule" || kind === "scheduler") return "定时任务";
+  if (kind === "api_key") return "API Key";
+  if (kind === "policy") return `收录策略 ${rest}`;
+  if (v === "system") return "系统";
+  return v;
+}
+
+export const ACTOR_TYPES = [
+  { value: "user", label: "管理员" },
+  { value: "api_key", label: "API Key" },
+  { value: "agent", label: "Agent" },
+  { value: "system", label: "系统" },
+];
+export const actorTypeLabel = (t: string) => ACTOR_TYPES.find((a) => a.value === t)?.label ?? t;
+
+/** 下载计划 statusReason(`added`、`organize:succeeded` 等)→ 中文;不认识的原样显示 */
+const PLAN_REASON: Record<string, string> = {
+  added: "已添加到下载器",
+  "organize:succeeded": "整理成功",
+  "organize:partial": "部分整理成功",
+  "organize:failed": "整理失败",
+};
+export const planReasonText = (v: string | null | undefined) => (v ? (PLAN_REASON[v] ?? v) : null);