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/components/settings/pi-test.tsx

@@ -18,6 +18,15 @@ const ERROR_KIND: Record<string, string> = {
   other: "失败",
 };
 
+const SOURCE_TEXT: Record<string, string> = { "stored credential": "已存凭证" };
+
+/** 上游返回的多是英文原文:先给一句怎么办,原文留作排查 */
+const ERROR_HINT: Record<string, string> = {
+  network: "连不上上游,检查 Base URL、端口和网络",
+  auth: "凭证被拒,检查 API Key 或重新订阅登录",
+  model: "模型不可用,换一个模型 id",
+};
+
 export function PiTestPanel({ upstream, model }: { upstream: PiUpstream; model?: string | null }) {
   const test = useTestPiUpstream();
   const [result, setResult] = useState<PiUpstreamTestResult | null>(null);
@@ -60,10 +69,13 @@ export function PiTestPanel({ upstream, model }: { upstream: PiUpstream; model?:
           </StatusBadge>
           <span className="text-muted-foreground">
             {result.latencyMs} ms{result.model ? ` · ${result.model}` : ""}
-            {result.source ? ` · ${result.source}` : ""}
+            {result.source ? ` · ${SOURCE_TEXT[result.source] ?? result.source}` : ""}
           </span>
           {!result.ok && result.message ? (
-            <span className="w-full break-words text-destructive">{result.message}</span>
+            <span className="w-full break-words text-destructive">
+              {ERROR_HINT[result.errorKind ?? ""] ? `${ERROR_HINT[result.errorKind ?? ""]}。原始错误:` : ""}
+              {result.message}
+            </span>
           ) : null}
         </div>
       ) : null}